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OpenCloudOS-Kernel/arch/powerpc/kvm/book3s_paired_singles.c

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KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright Novell Inc 2010
*
* Authors: Alexander Graf <agraf@suse.de>
*/
#include <asm/kvm.h>
#include <asm/kvm_ppc.h>
#include <asm/disassemble.h>
#include <asm/kvm_book3s.h>
#include <asm/kvm_fpu.h>
#include <asm/reg.h>
#include <asm/cacheflush.h>
powerpc/kvm: Fallout from system.h disintegration Add a missing include to fix build Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-04-02 01:35:53 +08:00
#include <asm/switch_to.h>
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
#include <linux/vmalloc.h>
/* #define DEBUG */
#ifdef DEBUG
#define dprintk printk
#else
#define dprintk(...) do { } while(0);
#endif
#define OP_LFS 48
#define OP_LFSU 49
#define OP_LFD 50
#define OP_LFDU 51
#define OP_STFS 52
#define OP_STFSU 53
#define OP_STFD 54
#define OP_STFDU 55
#define OP_PSQ_L 56
#define OP_PSQ_LU 57
#define OP_PSQ_ST 60
#define OP_PSQ_STU 61
#define OP_31_LFSX 535
#define OP_31_LFSUX 567
#define OP_31_LFDX 599
#define OP_31_LFDUX 631
#define OP_31_STFSX 663
#define OP_31_STFSUX 695
#define OP_31_STFX 727
#define OP_31_STFUX 759
#define OP_31_LWIZX 887
#define OP_31_STFIWX 983
#define OP_59_FADDS 21
#define OP_59_FSUBS 20
#define OP_59_FSQRTS 22
#define OP_59_FDIVS 18
#define OP_59_FRES 24
#define OP_59_FMULS 25
#define OP_59_FRSQRTES 26
#define OP_59_FMSUBS 28
#define OP_59_FMADDS 29
#define OP_59_FNMSUBS 30
#define OP_59_FNMADDS 31
#define OP_63_FCMPU 0
#define OP_63_FCPSGN 8
#define OP_63_FRSP 12
#define OP_63_FCTIW 14
#define OP_63_FCTIWZ 15
#define OP_63_FDIV 18
#define OP_63_FADD 21
#define OP_63_FSQRT 22
#define OP_63_FSEL 23
#define OP_63_FRE 24
#define OP_63_FMUL 25
#define OP_63_FRSQRTE 26
#define OP_63_FMSUB 28
#define OP_63_FMADD 29
#define OP_63_FNMSUB 30
#define OP_63_FNMADD 31
#define OP_63_FCMPO 32
#define OP_63_MTFSB1 38 // XXX
#define OP_63_FSUB 20
#define OP_63_FNEG 40
#define OP_63_MCRFS 64
#define OP_63_MTFSB0 70
#define OP_63_FMR 72
#define OP_63_MTFSFI 134
#define OP_63_FABS 264
#define OP_63_MFFS 583
#define OP_63_MTFSF 711
#define OP_4X_PS_CMPU0 0
#define OP_4X_PSQ_LX 6
#define OP_4XW_PSQ_STX 7
#define OP_4A_PS_SUM0 10
#define OP_4A_PS_SUM1 11
#define OP_4A_PS_MULS0 12
#define OP_4A_PS_MULS1 13
#define OP_4A_PS_MADDS0 14
#define OP_4A_PS_MADDS1 15
#define OP_4A_PS_DIV 18
#define OP_4A_PS_SUB 20
#define OP_4A_PS_ADD 21
#define OP_4A_PS_SEL 23
#define OP_4A_PS_RES 24
#define OP_4A_PS_MUL 25
#define OP_4A_PS_RSQRTE 26
#define OP_4A_PS_MSUB 28
#define OP_4A_PS_MADD 29
#define OP_4A_PS_NMSUB 30
#define OP_4A_PS_NMADD 31
#define OP_4X_PS_CMPO0 32
#define OP_4X_PSQ_LUX 38
#define OP_4XW_PSQ_STUX 39
#define OP_4X_PS_NEG 40
#define OP_4X_PS_CMPU1 64
#define OP_4X_PS_MR 72
#define OP_4X_PS_CMPO1 96
#define OP_4X_PS_NABS 136
#define OP_4X_PS_ABS 264
#define OP_4X_PS_MERGE00 528
#define OP_4X_PS_MERGE01 560
#define OP_4X_PS_MERGE10 592
#define OP_4X_PS_MERGE11 624
#define SCALAR_NONE 0
#define SCALAR_HIGH (1 << 0)
#define SCALAR_LOW (1 << 1)
#define SCALAR_NO_PS0 (1 << 2)
#define SCALAR_NO_PS1 (1 << 3)
#define GQR_ST_TYPE_MASK 0x00000007
#define GQR_ST_TYPE_SHIFT 0
#define GQR_ST_SCALE_MASK 0x00003f00
#define GQR_ST_SCALE_SHIFT 8
#define GQR_LD_TYPE_MASK 0x00070000
#define GQR_LD_TYPE_SHIFT 16
#define GQR_LD_SCALE_MASK 0x3f000000
#define GQR_LD_SCALE_SHIFT 24
#define GQR_QUANTIZE_FLOAT 0
#define GQR_QUANTIZE_U8 4
#define GQR_QUANTIZE_U16 5
#define GQR_QUANTIZE_S8 6
#define GQR_QUANTIZE_S16 7
#define FPU_LS_SINGLE 0
#define FPU_LS_DOUBLE 1
#define FPU_LS_SINGLE_LOW 2
static inline void kvmppc_sync_qpr(struct kvm_vcpu *vcpu, int rt)
{
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&vcpu->arch.fpr[rt], &vcpu->arch.qpr[rt]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
}
static void kvmppc_inject_pf(struct kvm_vcpu *vcpu, ulong eaddr, bool is_store)
{
u64 dsisr;
KVM: PPC: Convert MSR to shared page One of the most obvious registers to share with the guest directly is the MSR. The MSR contains the "interrupts enabled" flag which the guest has to toggle in critical sections. So in order to bring the overhead of interrupt en- and disabling down, let's put msr into the shared page. Keep in mind that even though you can fully read its contents, writing to it doesn't always update all state. There are a few safe fields that don't require hypervisor interaction. See the documentation for a list of MSR bits that are safe to be set from inside the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 20:47:43 +08:00
struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
KVM: PPC: Convert MSR to shared page One of the most obvious registers to share with the guest directly is the MSR. The MSR contains the "interrupts enabled" flag which the guest has to toggle in critical sections. So in order to bring the overhead of interrupt en- and disabling down, let's put msr into the shared page. Keep in mind that even though you can fully read its contents, writing to it doesn't always update all state. There are a few safe fields that don't require hypervisor interaction. See the documentation for a list of MSR bits that are safe to be set from inside the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 20:47:43 +08:00
shared->msr = kvmppc_set_field(shared->msr, 33, 36, 0);
shared->msr = kvmppc_set_field(shared->msr, 42, 47, 0);
KVM: PPC: Convert DAR to shared page. The DAR register contains the address a data page fault occured at. This register behaves pretty much like a simple data storage register that gets written to on data faults. There is no hypervisor interaction required on read or write. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 20:47:45 +08:00
shared->dar = eaddr;
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
/* Page Fault */
dsisr = kvmppc_set_field(0, 33, 33, 1);
if (is_store)
KVM: PPC: Convert DSISR to shared page The DSISR register contains information about a data page fault. It is fully read/write from inside the guest context and we don't need to worry about interacting based on writes of this register. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 20:47:44 +08:00
shared->dsisr = kvmppc_set_field(dsisr, 38, 38, 1);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
}
static int kvmppc_emulate_fpr_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
int rs, ulong addr, int ls_type)
{
int emulated = EMULATE_FAIL;
int r;
char tmp[8];
int len = sizeof(u32);
if (ls_type == FPU_LS_DOUBLE)
len = sizeof(u64);
/* read from memory */
r = kvmppc_ld(vcpu, &addr, len, tmp, true);
vcpu->arch.paddr_accessed = addr;
if (r < 0) {
kvmppc_inject_pf(vcpu, addr, false);
goto done_load;
} else if (r == EMULATE_DO_MMIO) {
KVM: PPC: Rename MMIO register identifiers We need the KVM_REG namespace for generic register settings now, so let's rename the existing users to something different, enabling us to reuse the namespace for more visible interfaces. While at it, also move these private constants to a private header. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-07 09:07:38 +08:00
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FPR | rs,
len, 1);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
goto done_load;
}
emulated = EMULATE_DONE;
/* put in registers */
switch (ls_type) {
case FPU_LS_SINGLE:
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_fd((u32*)tmp, &vcpu->arch.fpr[rs]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
vcpu->arch.qpr[rs] = *((u32*)tmp);
break;
case FPU_LS_DOUBLE:
vcpu->arch.fpr[rs] = *((u64*)tmp);
break;
}
dprintk(KERN_INFO "KVM: FPR_LD [0x%llx] at 0x%lx (%d)\n", *(u64*)tmp,
addr, len);
done_load:
return emulated;
}
static int kvmppc_emulate_fpr_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
int rs, ulong addr, int ls_type)
{
int emulated = EMULATE_FAIL;
int r;
char tmp[8];
u64 val;
int len;
switch (ls_type) {
case FPU_LS_SINGLE:
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&vcpu->arch.fpr[rs], (u32*)tmp);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
val = *((u32*)tmp);
len = sizeof(u32);
break;
case FPU_LS_SINGLE_LOW:
*((u32*)tmp) = vcpu->arch.fpr[rs];
val = vcpu->arch.fpr[rs] & 0xffffffff;
len = sizeof(u32);
break;
case FPU_LS_DOUBLE:
*((u64*)tmp) = vcpu->arch.fpr[rs];
val = vcpu->arch.fpr[rs];
len = sizeof(u64);
break;
default:
val = 0;
len = 0;
}
r = kvmppc_st(vcpu, &addr, len, tmp, true);
vcpu->arch.paddr_accessed = addr;
if (r < 0) {
kvmppc_inject_pf(vcpu, addr, true);
} else if (r == EMULATE_DO_MMIO) {
emulated = kvmppc_handle_store(run, vcpu, val, len, 1);
} else {
emulated = EMULATE_DONE;
}
dprintk(KERN_INFO "KVM: FPR_ST [0x%llx] at 0x%lx (%d)\n",
val, addr, len);
return emulated;
}
static int kvmppc_emulate_psq_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
int rs, ulong addr, bool w, int i)
{
int emulated = EMULATE_FAIL;
int r;
float one = 1.0;
u32 tmp[2];
/* read from memory */
if (w) {
r = kvmppc_ld(vcpu, &addr, sizeof(u32), tmp, true);
memcpy(&tmp[1], &one, sizeof(u32));
} else {
r = kvmppc_ld(vcpu, &addr, sizeof(u32) * 2, tmp, true);
}
vcpu->arch.paddr_accessed = addr;
if (r < 0) {
kvmppc_inject_pf(vcpu, addr, false);
goto done_load;
} else if ((r == EMULATE_DO_MMIO) && w) {
KVM: PPC: Rename MMIO register identifiers We need the KVM_REG namespace for generic register settings now, so let's rename the existing users to something different, enabling us to reuse the namespace for more visible interfaces. While at it, also move these private constants to a private header. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-07 09:07:38 +08:00
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FPR | rs,
4, 1);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
vcpu->arch.qpr[rs] = tmp[1];
goto done_load;
} else if (r == EMULATE_DO_MMIO) {
KVM: PPC: Rename MMIO register identifiers We need the KVM_REG namespace for generic register settings now, so let's rename the existing users to something different, enabling us to reuse the namespace for more visible interfaces. While at it, also move these private constants to a private header. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-07 09:07:38 +08:00
emulated = kvmppc_handle_load(run, vcpu, KVM_MMIO_REG_FQPR | rs,
8, 1);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
goto done_load;
}
emulated = EMULATE_DONE;
/* put in registers */
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_fd(&tmp[0], &vcpu->arch.fpr[rs]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
vcpu->arch.qpr[rs] = tmp[1];
dprintk(KERN_INFO "KVM: PSQ_LD [0x%x, 0x%x] at 0x%lx (%d)\n", tmp[0],
tmp[1], addr, w ? 4 : 8);
done_load:
return emulated;
}
static int kvmppc_emulate_psq_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
int rs, ulong addr, bool w, int i)
{
int emulated = EMULATE_FAIL;
int r;
u32 tmp[2];
int len = w ? sizeof(u32) : sizeof(u64);
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&vcpu->arch.fpr[rs], &tmp[0]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
tmp[1] = vcpu->arch.qpr[rs];
r = kvmppc_st(vcpu, &addr, len, tmp, true);
vcpu->arch.paddr_accessed = addr;
if (r < 0) {
kvmppc_inject_pf(vcpu, addr, true);
} else if ((r == EMULATE_DO_MMIO) && w) {
emulated = kvmppc_handle_store(run, vcpu, tmp[0], 4, 1);
} else if (r == EMULATE_DO_MMIO) {
u64 val = ((u64)tmp[0] << 32) | tmp[1];
emulated = kvmppc_handle_store(run, vcpu, val, 8, 1);
} else {
emulated = EMULATE_DONE;
}
dprintk(KERN_INFO "KVM: PSQ_ST [0x%x, 0x%x] at 0x%lx (%d)\n",
tmp[0], tmp[1], addr, len);
return emulated;
}
/*
* Cuts out inst bits with ordering according to spec.
* That means the leftmost bit is zero. All given bits are included.
*/
static inline u32 inst_get_field(u32 inst, int msb, int lsb)
{
return kvmppc_get_field(inst, msb + 32, lsb + 32);
}
/*
* Replaces inst bits with ordering according to spec.
*/
static inline u32 inst_set_field(u32 inst, int msb, int lsb, int value)
{
return kvmppc_set_field(inst, msb + 32, lsb + 32, value);
}
bool kvmppc_inst_is_paired_single(struct kvm_vcpu *vcpu, u32 inst)
{
if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
return false;
switch (get_op(inst)) {
case OP_PSQ_L:
case OP_PSQ_LU:
case OP_PSQ_ST:
case OP_PSQ_STU:
case OP_LFS:
case OP_LFSU:
case OP_LFD:
case OP_LFDU:
case OP_STFS:
case OP_STFSU:
case OP_STFD:
case OP_STFDU:
return true;
case 4:
/* X form */
switch (inst_get_field(inst, 21, 30)) {
case OP_4X_PS_CMPU0:
case OP_4X_PSQ_LX:
case OP_4X_PS_CMPO0:
case OP_4X_PSQ_LUX:
case OP_4X_PS_NEG:
case OP_4X_PS_CMPU1:
case OP_4X_PS_MR:
case OP_4X_PS_CMPO1:
case OP_4X_PS_NABS:
case OP_4X_PS_ABS:
case OP_4X_PS_MERGE00:
case OP_4X_PS_MERGE01:
case OP_4X_PS_MERGE10:
case OP_4X_PS_MERGE11:
return true;
}
/* XW form */
switch (inst_get_field(inst, 25, 30)) {
case OP_4XW_PSQ_STX:
case OP_4XW_PSQ_STUX:
return true;
}
/* A form */
switch (inst_get_field(inst, 26, 30)) {
case OP_4A_PS_SUM1:
case OP_4A_PS_SUM0:
case OP_4A_PS_MULS0:
case OP_4A_PS_MULS1:
case OP_4A_PS_MADDS0:
case OP_4A_PS_MADDS1:
case OP_4A_PS_DIV:
case OP_4A_PS_SUB:
case OP_4A_PS_ADD:
case OP_4A_PS_SEL:
case OP_4A_PS_RES:
case OP_4A_PS_MUL:
case OP_4A_PS_RSQRTE:
case OP_4A_PS_MSUB:
case OP_4A_PS_MADD:
case OP_4A_PS_NMSUB:
case OP_4A_PS_NMADD:
return true;
}
break;
case 59:
switch (inst_get_field(inst, 21, 30)) {
case OP_59_FADDS:
case OP_59_FSUBS:
case OP_59_FDIVS:
case OP_59_FRES:
case OP_59_FRSQRTES:
return true;
}
switch (inst_get_field(inst, 26, 30)) {
case OP_59_FMULS:
case OP_59_FMSUBS:
case OP_59_FMADDS:
case OP_59_FNMSUBS:
case OP_59_FNMADDS:
return true;
}
break;
case 63:
switch (inst_get_field(inst, 21, 30)) {
case OP_63_MTFSB0:
case OP_63_MTFSB1:
case OP_63_MTFSF:
case OP_63_MTFSFI:
case OP_63_MCRFS:
case OP_63_MFFS:
case OP_63_FCMPU:
case OP_63_FCMPO:
case OP_63_FNEG:
case OP_63_FMR:
case OP_63_FABS:
case OP_63_FRSP:
case OP_63_FDIV:
case OP_63_FADD:
case OP_63_FSUB:
case OP_63_FCTIW:
case OP_63_FCTIWZ:
case OP_63_FRSQRTE:
case OP_63_FCPSGN:
return true;
}
switch (inst_get_field(inst, 26, 30)) {
case OP_63_FMUL:
case OP_63_FSEL:
case OP_63_FMSUB:
case OP_63_FMADD:
case OP_63_FNMSUB:
case OP_63_FNMADD:
return true;
}
break;
case 31:
switch (inst_get_field(inst, 21, 30)) {
case OP_31_LFSX:
case OP_31_LFSUX:
case OP_31_LFDX:
case OP_31_LFDUX:
case OP_31_STFSX:
case OP_31_STFSUX:
case OP_31_STFX:
case OP_31_STFUX:
case OP_31_STFIWX:
return true;
}
break;
}
return false;
}
static int get_d_signext(u32 inst)
{
int d = inst & 0x8ff;
if (d & 0x800)
return -(d & 0x7ff);
return (d & 0x7ff);
}
static int kvmppc_ps_three_in(struct kvm_vcpu *vcpu, bool rc,
int reg_out, int reg_in1, int reg_in2,
int reg_in3, int scalar,
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
void (*func)(u64 *fpscr,
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
u32 *dst, u32 *src1,
u32 *src2, u32 *src3))
{
u32 *qpr = vcpu->arch.qpr;
u64 *fpr = vcpu->arch.fpr;
u32 ps0_out;
u32 ps0_in1, ps0_in2, ps0_in3;
u32 ps1_in1, ps1_in2, ps1_in3;
/* RC */
WARN_ON(rc);
/* PS0 */
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&fpr[reg_in1], &ps0_in1);
kvm_cvt_df(&fpr[reg_in2], &ps0_in2);
kvm_cvt_df(&fpr[reg_in3], &ps0_in3);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
if (scalar & SCALAR_LOW)
ps0_in2 = qpr[reg_in2];
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2, &ps0_in3);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "PS3 ps0 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n",
ps0_in1, ps0_in2, ps0_in3, ps0_out);
if (!(scalar & SCALAR_NO_PS0))
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_fd(&ps0_out, &fpr[reg_out]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
/* PS1 */
ps1_in1 = qpr[reg_in1];
ps1_in2 = qpr[reg_in2];
ps1_in3 = qpr[reg_in3];
if (scalar & SCALAR_HIGH)
ps1_in2 = ps0_in2;
if (!(scalar & SCALAR_NO_PS1))
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in1, &ps1_in2, &ps1_in3);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "PS3 ps1 -> f(0x%x, 0x%x, 0x%x) = 0x%x\n",
ps1_in1, ps1_in2, ps1_in3, qpr[reg_out]);
return EMULATE_DONE;
}
static int kvmppc_ps_two_in(struct kvm_vcpu *vcpu, bool rc,
int reg_out, int reg_in1, int reg_in2,
int scalar,
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
void (*func)(u64 *fpscr,
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
u32 *dst, u32 *src1,
u32 *src2))
{
u32 *qpr = vcpu->arch.qpr;
u64 *fpr = vcpu->arch.fpr;
u32 ps0_out;
u32 ps0_in1, ps0_in2;
u32 ps1_out;
u32 ps1_in1, ps1_in2;
/* RC */
WARN_ON(rc);
/* PS0 */
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&fpr[reg_in1], &ps0_in1);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
if (scalar & SCALAR_LOW)
ps0_in2 = qpr[reg_in2];
else
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&fpr[reg_in2], &ps0_in2);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &ps0_out, &ps0_in1, &ps0_in2);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
if (!(scalar & SCALAR_NO_PS0)) {
dprintk(KERN_INFO "PS2 ps0 -> f(0x%x, 0x%x) = 0x%x\n",
ps0_in1, ps0_in2, ps0_out);
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_fd(&ps0_out, &fpr[reg_out]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
}
/* PS1 */
ps1_in1 = qpr[reg_in1];
ps1_in2 = qpr[reg_in2];
if (scalar & SCALAR_HIGH)
ps1_in2 = ps0_in2;
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &ps1_out, &ps1_in1, &ps1_in2);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
if (!(scalar & SCALAR_NO_PS1)) {
qpr[reg_out] = ps1_out;
dprintk(KERN_INFO "PS2 ps1 -> f(0x%x, 0x%x) = 0x%x\n",
ps1_in1, ps1_in2, qpr[reg_out]);
}
return EMULATE_DONE;
}
static int kvmppc_ps_one_in(struct kvm_vcpu *vcpu, bool rc,
int reg_out, int reg_in,
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
void (*func)(u64 *t,
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
u32 *dst, u32 *src1))
{
u32 *qpr = vcpu->arch.qpr;
u64 *fpr = vcpu->arch.fpr;
u32 ps0_out, ps0_in;
u32 ps1_in;
/* RC */
WARN_ON(rc);
/* PS0 */
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&fpr[reg_in], &ps0_in);
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &ps0_out, &ps0_in);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "PS1 ps0 -> f(0x%x) = 0x%x\n",
ps0_in, ps0_out);
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_fd(&ps0_out, &fpr[reg_out]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
/* PS1 */
ps1_in = qpr[reg_in];
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
func(&vcpu->arch.fpscr, &qpr[reg_out], &ps1_in);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "PS1 ps1 -> f(0x%x) = 0x%x\n",
ps1_in, qpr[reg_out]);
return EMULATE_DONE;
}
int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
KVM: PPC: Improve indirect svcpu accessors We already have some inline fuctions we use to access vcpu or svcpu structs, depending on whether we're on booke or book3s. Since we just put a few more registers into the svcpu, we also need to make sure the respective callbacks are available and get used. So this patch moves direct use of the now in the svcpu struct fields to inline function calls. While at it, it also moves the definition of those inline function calls to respective header files for booke and book3s, greatly improving readability. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-04-16 06:11:40 +08:00
u32 inst = kvmppc_get_last_inst(vcpu);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
enum emulation_result emulated = EMULATE_DONE;
int ax_rd = inst_get_field(inst, 6, 10);
int ax_ra = inst_get_field(inst, 11, 15);
int ax_rb = inst_get_field(inst, 16, 20);
int ax_rc = inst_get_field(inst, 21, 25);
short full_d = inst_get_field(inst, 16, 31);
u64 *fpr_d = &vcpu->arch.fpr[ax_rd];
u64 *fpr_a = &vcpu->arch.fpr[ax_ra];
u64 *fpr_b = &vcpu->arch.fpr[ax_rb];
u64 *fpr_c = &vcpu->arch.fpr[ax_rc];
bool rcomp = (inst & 1) ? true : false;
u32 cr = kvmppc_get_cr(vcpu);
#ifdef DEBUG
int i;
#endif
if (!kvmppc_inst_is_paired_single(vcpu, inst))
return EMULATE_FAIL;
KVM: PPC: Convert MSR to shared page One of the most obvious registers to share with the guest directly is the MSR. The MSR contains the "interrupts enabled" flag which the guest has to toggle in critical sections. So in order to bring the overhead of interrupt en- and disabling down, let's put msr into the shared page. Keep in mind that even though you can fully read its contents, writing to it doesn't always update all state. There are a few safe fields that don't require hypervisor interaction. See the documentation for a list of MSR bits that are safe to be set from inside the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-29 20:47:43 +08:00
if (!(vcpu->arch.shared->msr & MSR_FP)) {
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL);
return EMULATE_AGAIN;
}
kvmppc_giveup_ext(vcpu, MSR_FP);
preempt_disable();
enable_kernel_fp();
/* Do we need to clear FE0 / FE1 here? Don't think so. */
#ifdef DEBUG
for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) {
u32 f;
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&vcpu->arch.fpr[i], &f);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "FPR[%d] = 0x%x / 0x%llx QPR[%d] = 0x%x\n",
i, f, vcpu->arch.fpr[i], i, vcpu->arch.qpr[i]);
}
#endif
switch (get_op(inst)) {
case OP_PSQ_L:
{
ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
bool w = inst_get_field(inst, 16, 16) ? true : false;
int i = inst_get_field(inst, 17, 19);
addr += get_d_signext(inst);
emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
break;
}
case OP_PSQ_LU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
bool w = inst_get_field(inst, 16, 16) ? true : false;
int i = inst_get_field(inst, 17, 19);
addr += get_d_signext(inst);
emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_PSQ_ST:
{
ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
bool w = inst_get_field(inst, 16, 16) ? true : false;
int i = inst_get_field(inst, 17, 19);
addr += get_d_signext(inst);
emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
break;
}
case OP_PSQ_STU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
bool w = inst_get_field(inst, 16, 16) ? true : false;
int i = inst_get_field(inst, 17, 19);
addr += get_d_signext(inst);
emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case 4:
/* X form */
switch (inst_get_field(inst, 21, 30)) {
case OP_4X_PS_CMPU0:
/* XXX */
emulated = EMULATE_FAIL;
break;
case OP_4X_PSQ_LX:
{
ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
bool w = inst_get_field(inst, 21, 21) ? true : false;
int i = inst_get_field(inst, 22, 24);
addr += kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
break;
}
case OP_4X_PS_CMPO0:
/* XXX */
emulated = EMULATE_FAIL;
break;
case OP_4X_PSQ_LUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
bool w = inst_get_field(inst, 21, 21) ? true : false;
int i = inst_get_field(inst, 22, 24);
addr += kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_psq_load(run, vcpu, ax_rd, addr, w, i);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_4X_PS_NEG:
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
vcpu->arch.fpr[ax_rd] ^= 0x8000000000000000ULL;
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
vcpu->arch.qpr[ax_rd] ^= 0x80000000;
break;
case OP_4X_PS_CMPU1:
/* XXX */
emulated = EMULATE_FAIL;
break;
case OP_4X_PS_MR:
WARN_ON(rcomp);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
break;
case OP_4X_PS_CMPO1:
/* XXX */
emulated = EMULATE_FAIL;
break;
case OP_4X_PS_NABS:
WARN_ON(rcomp);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
vcpu->arch.fpr[ax_rd] |= 0x8000000000000000ULL;
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
vcpu->arch.qpr[ax_rd] |= 0x80000000;
break;
case OP_4X_PS_ABS:
WARN_ON(rcomp);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rb];
vcpu->arch.fpr[ax_rd] &= ~0x8000000000000000ULL;
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
vcpu->arch.qpr[ax_rd] &= ~0x80000000;
break;
case OP_4X_PS_MERGE00:
WARN_ON(rcomp);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_ra];
/* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
kvm_cvt_df(&vcpu->arch.fpr[ax_rb],
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
&vcpu->arch.qpr[ax_rd]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
break;
case OP_4X_PS_MERGE01:
WARN_ON(rcomp);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_ra];
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
break;
case OP_4X_PS_MERGE10:
WARN_ON(rcomp);
/* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
kvm_cvt_fd(&vcpu->arch.qpr[ax_ra],
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
&vcpu->arch.fpr[ax_rd]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
/* vcpu->arch.qpr[ax_rd] = vcpu->arch.fpr[ax_rb]; */
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
kvm_cvt_df(&vcpu->arch.fpr[ax_rb],
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
&vcpu->arch.qpr[ax_rd]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
break;
case OP_4X_PS_MERGE11:
WARN_ON(rcomp);
/* vcpu->arch.fpr[ax_rd] = vcpu->arch.qpr[ax_ra]; */
KVM: PPC: elide struct thread_struct instances from stack Instead of instantiating a whole thread_struct on the stack use only the required parts of it. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Tested-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-01 03:59:13 +08:00
kvm_cvt_fd(&vcpu->arch.qpr[ax_ra],
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
&vcpu->arch.fpr[ax_rd]);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rb];
break;
}
/* XW form */
switch (inst_get_field(inst, 25, 30)) {
case OP_4XW_PSQ_STX:
{
ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
bool w = inst_get_field(inst, 21, 21) ? true : false;
int i = inst_get_field(inst, 22, 24);
addr += kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
break;
}
case OP_4XW_PSQ_STUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra);
bool w = inst_get_field(inst, 21, 21) ? true : false;
int i = inst_get_field(inst, 22, 24);
addr += kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_psq_store(run, vcpu, ax_rd, addr, w, i);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
}
/* A form */
switch (inst_get_field(inst, 26, 30)) {
case OP_4A_PS_SUM1:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_rb, ax_ra, SCALAR_NO_PS0 | SCALAR_HIGH, fps_fadds);
vcpu->arch.fpr[ax_rd] = vcpu->arch.fpr[ax_rc];
break;
case OP_4A_PS_SUM0:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rb, SCALAR_NO_PS1 | SCALAR_LOW, fps_fadds);
vcpu->arch.qpr[ax_rd] = vcpu->arch.qpr[ax_rc];
break;
case OP_4A_PS_MULS0:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, SCALAR_HIGH, fps_fmuls);
break;
case OP_4A_PS_MULS1:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, SCALAR_LOW, fps_fmuls);
break;
case OP_4A_PS_MADDS0:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_HIGH, fps_fmadds);
break;
case OP_4A_PS_MADDS1:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_LOW, fps_fmadds);
break;
case OP_4A_PS_DIV:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rb, SCALAR_NONE, fps_fdivs);
break;
case OP_4A_PS_SUB:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rb, SCALAR_NONE, fps_fsubs);
break;
case OP_4A_PS_ADD:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rb, SCALAR_NONE, fps_fadds);
break;
case OP_4A_PS_SEL:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fsel);
break;
case OP_4A_PS_RES:
emulated = kvmppc_ps_one_in(vcpu, rcomp, ax_rd,
ax_rb, fps_fres);
break;
case OP_4A_PS_MUL:
emulated = kvmppc_ps_two_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, SCALAR_NONE, fps_fmuls);
break;
case OP_4A_PS_RSQRTE:
emulated = kvmppc_ps_one_in(vcpu, rcomp, ax_rd,
ax_rb, fps_frsqrte);
break;
case OP_4A_PS_MSUB:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fmsubs);
break;
case OP_4A_PS_MADD:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fmadds);
break;
case OP_4A_PS_NMSUB:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fnmsubs);
break;
case OP_4A_PS_NMADD:
emulated = kvmppc_ps_three_in(vcpu, rcomp, ax_rd,
ax_ra, ax_rc, ax_rb, SCALAR_NONE, fps_fnmadds);
break;
}
break;
/* Real FPU operations */
case OP_LFS:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
FPU_LS_SINGLE);
break;
}
case OP_LFSU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
FPU_LS_SINGLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_LFD:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
FPU_LS_DOUBLE);
break;
}
case OP_LFDU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd, addr,
FPU_LS_DOUBLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_STFS:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
FPU_LS_SINGLE);
break;
}
case OP_STFSU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
FPU_LS_SINGLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_STFD:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) + full_d;
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
FPU_LS_DOUBLE);
break;
}
case OP_STFDU:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) + full_d;
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd, addr,
FPU_LS_DOUBLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case 31:
switch (inst_get_field(inst, 21, 30)) {
case OP_31_LFSX:
{
ulong addr = ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0;
addr += kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
addr, FPU_LS_SINGLE);
break;
}
case OP_31_LFSUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
addr, FPU_LS_SINGLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_31_LFDX:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
addr, FPU_LS_DOUBLE);
break;
}
case OP_31_LFDUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_load(run, vcpu, ax_rd,
addr, FPU_LS_DOUBLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_31_STFSX:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
addr, FPU_LS_SINGLE);
break;
}
case OP_31_STFSUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
addr, FPU_LS_SINGLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_31_STFX:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
addr, FPU_LS_DOUBLE);
break;
}
case OP_31_STFUX:
{
ulong addr = kvmppc_get_gpr(vcpu, ax_ra) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
addr, FPU_LS_DOUBLE);
if (emulated == EMULATE_DONE)
kvmppc_set_gpr(vcpu, ax_ra, addr);
break;
}
case OP_31_STFIWX:
{
ulong addr = (ax_ra ? kvmppc_get_gpr(vcpu, ax_ra) : 0) +
kvmppc_get_gpr(vcpu, ax_rb);
emulated = kvmppc_emulate_fpr_store(run, vcpu, ax_rd,
addr,
FPU_LS_SINGLE_LOW);
break;
}
break;
}
break;
case 59:
switch (inst_get_field(inst, 21, 30)) {
case OP_59_FADDS:
fpd_fadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FSUBS:
fpd_fsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FDIVS:
fpd_fdivs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FRES:
fpd_fres(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FRSQRTES:
fpd_frsqrtes(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
}
switch (inst_get_field(inst, 26, 30)) {
case OP_59_FMULS:
fpd_fmuls(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FMSUBS:
fpd_fmsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FMADDS:
fpd_fmadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FNMSUBS:
fpd_fnmsubs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_59_FNMADDS:
fpd_fnmadds(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
}
break;
case 63:
switch (inst_get_field(inst, 21, 30)) {
case OP_63_MTFSB0:
case OP_63_MTFSB1:
case OP_63_MCRFS:
case OP_63_MTFSFI:
/* XXX need to implement */
break;
case OP_63_MFFS:
/* XXX missing CR */
*fpr_d = vcpu->arch.fpscr;
break;
case OP_63_MTFSF:
/* XXX missing fm bits */
/* XXX missing CR */
vcpu->arch.fpscr = *fpr_b;
break;
case OP_63_FCMPU:
{
u32 tmp_cr;
u32 cr0_mask = 0xf0000000;
u32 cr_shift = inst_get_field(inst, 6, 8) * 4;
fpd_fcmpu(&vcpu->arch.fpscr, &tmp_cr, fpr_a, fpr_b);
cr &= ~(cr0_mask >> cr_shift);
cr |= (cr & cr0_mask) >> cr_shift;
break;
}
case OP_63_FCMPO:
{
u32 tmp_cr;
u32 cr0_mask = 0xf0000000;
u32 cr_shift = inst_get_field(inst, 6, 8) * 4;
fpd_fcmpo(&vcpu->arch.fpscr, &tmp_cr, fpr_a, fpr_b);
cr &= ~(cr0_mask >> cr_shift);
cr |= (cr & cr0_mask) >> cr_shift;
break;
}
case OP_63_FNEG:
fpd_fneg(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
break;
case OP_63_FMR:
*fpr_d = *fpr_b;
break;
case OP_63_FABS:
fpd_fabs(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
break;
case OP_63_FCPSGN:
fpd_fcpsgn(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
break;
case OP_63_FDIV:
fpd_fdiv(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
break;
case OP_63_FADD:
fpd_fadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
break;
case OP_63_FSUB:
fpd_fsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_b);
break;
case OP_63_FCTIW:
fpd_fctiw(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
break;
case OP_63_FCTIWZ:
fpd_fctiwz(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
break;
case OP_63_FRSP:
fpd_frsp(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
kvmppc_sync_qpr(vcpu, ax_rd);
break;
case OP_63_FRSQRTE:
{
double one = 1.0f;
/* fD = sqrt(fB) */
fpd_fsqrt(&vcpu->arch.fpscr, &cr, fpr_d, fpr_b);
/* fD = 1.0f / fD */
fpd_fdiv(&vcpu->arch.fpscr, &cr, fpr_d, (u64*)&one, fpr_d);
break;
}
}
switch (inst_get_field(inst, 26, 30)) {
case OP_63_FMUL:
fpd_fmul(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c);
break;
case OP_63_FSEL:
fpd_fsel(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
break;
case OP_63_FMSUB:
fpd_fmsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
break;
case OP_63_FMADD:
fpd_fmadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
break;
case OP_63_FNMSUB:
fpd_fnmsub(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
break;
case OP_63_FNMADD:
fpd_fnmadd(&vcpu->arch.fpscr, &cr, fpr_d, fpr_a, fpr_c, fpr_b);
break;
}
break;
}
#ifdef DEBUG
for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) {
u32 f;
powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} Neither lfs nor stfs touch the fpscr, so remove the restore/save of it around them. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-21 19:43:20 +08:00
kvm_cvt_df(&vcpu->arch.fpr[i], &f);
KVM: PPC: Implement Paired Single emulation The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-19 18:00:44 +08:00
dprintk(KERN_INFO "FPR[%d] = 0x%x\n", i, f);
}
#endif
if (rcomp)
kvmppc_set_cr(vcpu, cr);
preempt_enable();
return emulated;
}