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OpenCloudOS-Kernel/arch/powerpc/kvm/e500_tlb.c

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/*
* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, yu.liu@freescale.com
*
* Description:
* This file is based on arch/powerpc/kvm/44x_tlb.c,
* by Hollis Blanchard <hollisb@us.ibm.com>.
*
* 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.
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/highmem.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_e500.h>
#include "../mm/mmu_decl.h"
#include "e500_tlb.h"
#include "trace.h"
#define to_htlb1_esel(esel) (tlb1_entry_num - (esel) - 1)
static unsigned int tlb1_entry_num;
void kvmppc_dump_tlbs(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
struct tlbe *tlbe;
int i, tlbsel;
printk("| %8s | %8s | %8s | %8s | %8s |\n",
"nr", "mas1", "mas2", "mas3", "mas7");
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
printk("Guest TLB%d:\n", tlbsel);
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
if (tlbe->mas1 & MAS1_VALID)
printk(" G[%d][%3d] | %08X | %08X | %08X | %08X |\n",
tlbsel, i, tlbe->mas1, tlbe->mas2,
tlbe->mas3, tlbe->mas7);
}
}
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
printk("Shadow TLB%d:\n", tlbsel);
for (i = 0; i < vcpu_e500->shadow_tlb_size[tlbsel]; i++) {
tlbe = &vcpu_e500->shadow_tlb[tlbsel][i];
if (tlbe->mas1 & MAS1_VALID)
printk(" S[%d][%3d] | %08X | %08X | %08X | %08X |\n",
tlbsel, i, tlbe->mas1, tlbe->mas2,
tlbe->mas3, tlbe->mas7);
}
}
}
static inline unsigned int tlb0_get_next_victim(
struct kvmppc_vcpu_e500 *vcpu_e500)
{
unsigned int victim;
victim = vcpu_e500->guest_tlb_nv[0]++;
if (unlikely(vcpu_e500->guest_tlb_nv[0] >= KVM_E500_TLB0_WAY_NUM))
vcpu_e500->guest_tlb_nv[0] = 0;
return victim;
}
static inline unsigned int tlb1_max_shadow_size(void)
{
return tlb1_entry_num - tlbcam_index;
}
static inline int tlbe_is_writable(struct tlbe *tlbe)
{
return tlbe->mas3 & (MAS3_SW|MAS3_UW);
}
static inline u32 e500_shadow_mas3_attrib(u32 mas3, int usermode)
{
/* Mask off reserved bits. */
mas3 &= MAS3_ATTRIB_MASK;
if (!usermode) {
/* Guest is in supervisor mode,
* so we need to translate guest
* supervisor permissions into user permissions. */
mas3 &= ~E500_TLB_USER_PERM_MASK;
mas3 |= (mas3 & E500_TLB_SUPER_PERM_MASK) << 1;
}
return mas3 | E500_TLB_SUPER_PERM_MASK;
}
static inline u32 e500_shadow_mas2_attrib(u32 mas2, int usermode)
{
#ifdef CONFIG_SMP
return (mas2 & MAS2_ATTRIB_MASK) | MAS2_M;
#else
return mas2 & MAS2_ATTRIB_MASK;
#endif
}
/*
* writing shadow tlb entry to host TLB
*/
static inline void __write_host_tlbe(struct tlbe *stlbe)
{
mtspr(SPRN_MAS1, stlbe->mas1);
mtspr(SPRN_MAS2, stlbe->mas2);
mtspr(SPRN_MAS3, stlbe->mas3);
mtspr(SPRN_MAS7, stlbe->mas7);
__asm__ __volatile__ ("tlbwe\n" : : );
}
static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
local_irq_disable();
if (tlbsel == 0) {
__write_host_tlbe(stlbe);
} else {
unsigned register mas0;
mas0 = mfspr(SPRN_MAS0);
mtspr(SPRN_MAS0, MAS0_TLBSEL(1) | MAS0_ESEL(to_htlb1_esel(esel)));
__write_host_tlbe(stlbe);
mtspr(SPRN_MAS0, mas0);
}
local_irq_enable();
}
void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int i;
unsigned register mas0;
/* Load all valid TLB1 entries to reduce guest tlb miss fault */
local_irq_disable();
mas0 = mfspr(SPRN_MAS0);
for (i = 0; i < tlb1_max_shadow_size(); i++) {
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
if (get_tlb_v(stlbe)) {
mtspr(SPRN_MAS0, MAS0_TLBSEL(1)
| MAS0_ESEL(to_htlb1_esel(i)));
__write_host_tlbe(stlbe);
}
}
mtspr(SPRN_MAS0, mas0);
local_irq_enable();
}
void kvmppc_e500_tlb_put(struct kvm_vcpu *vcpu)
{
_tlbil_all();
}
/* Search the guest TLB for a matching entry. */
static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
gva_t eaddr, int tlbsel, unsigned int pid, int as)
{
int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++) {
struct tlbe *tlbe = &vcpu_e500->guest_tlb[tlbsel][i];
unsigned int tid;
if (eaddr < get_tlb_eaddr(tlbe))
continue;
if (eaddr > get_tlb_end(tlbe))
continue;
tid = get_tlb_tid(tlbe);
if (tid && (tid != pid))
continue;
if (!get_tlb_v(tlbe))
continue;
if (get_tlb_ts(tlbe) != as && as != -1)
continue;
return i;
}
return -1;
}
static void kvmppc_e500_shadow_release(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
struct page *page = vcpu_e500->shadow_pages[tlbsel][esel];
if (page) {
vcpu_e500->shadow_pages[tlbsel][esel] = NULL;
if (get_tlb_v(stlbe)) {
if (tlbe_is_writable(stlbe))
kvm_release_page_dirty(page);
else
kvm_release_page_clean(page);
}
}
}
static void kvmppc_e500_stlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
stlbe->mas1 = 0;
trace_kvm_stlb_inval(index_of(tlbsel, esel));
}
static void kvmppc_e500_tlb1_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
gva_t eaddr, gva_t eend, u32 tid)
{
unsigned int pid = tid & 0xff;
unsigned int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < vcpu_e500->guest_tlb_size[1]; i++) {
struct tlbe *stlbe = &vcpu_e500->shadow_tlb[1][i];
unsigned int tid;
if (!get_tlb_v(stlbe))
continue;
if (eend < get_tlb_eaddr(stlbe))
continue;
if (eaddr > get_tlb_end(stlbe))
continue;
tid = get_tlb_tid(stlbe);
if (tid && (tid != pid))
continue;
kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
write_host_tlbe(vcpu_e500, 1, i);
}
}
static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
unsigned int eaddr, int as)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
unsigned int victim, pidsel, tsized;
int tlbsel;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = (vcpu_e500->mas4 >> 28) & 0x1;
victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
pidsel = (vcpu_e500->mas4 >> 16) & 0xf;
tsized = (vcpu_e500->mas4 >> 7) & 0x1f;
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
| MAS1_TID(vcpu_e500->pid[pidsel])
| MAS1_TSIZE(tsized);
vcpu_e500->mas2 = (eaddr & MAS2_EPN)
| (vcpu_e500->mas4 & MAS2_ATTRIB_MASK);
vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
vcpu_e500->mas6 = (vcpu_e500->mas6 & MAS6_SPID1)
| (get_cur_pid(vcpu) << 16)
| (as ? MAS6_SAS : 0);
vcpu_e500->mas7 = 0;
}
static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500,
u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe, int tlbsel, int esel)
{
struct page *new_page;
struct tlbe *stlbe;
hpa_t hpaddr;
stlbe = &vcpu_e500->shadow_tlb[tlbsel][esel];
/* Get reference to new page. */
new_page = gfn_to_page(vcpu_e500->vcpu.kvm, gfn);
if (is_error_page(new_page)) {
printk(KERN_ERR "Couldn't get guest page for gfn %lx!\n",
(long)gfn);
kvm_release_page_clean(new_page);
return;
}
hpaddr = page_to_phys(new_page);
/* Drop reference to old page. */
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, esel);
vcpu_e500->shadow_pages[tlbsel][esel] = new_page;
/* Force TS=1 IPROT=0 TSIZE=4KB for all guest mappings. */
stlbe->mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K)
| MAS1_TID(get_tlb_tid(gtlbe)) | MAS1_TS | MAS1_VALID;
stlbe->mas2 = (gvaddr & MAS2_EPN)
| e500_shadow_mas2_attrib(gtlbe->mas2,
vcpu_e500->vcpu.arch.shared->msr & MSR_PR);
stlbe->mas3 = (hpaddr & MAS3_RPN)
| e500_shadow_mas3_attrib(gtlbe->mas3,
vcpu_e500->vcpu.arch.shared->msr & MSR_PR);
stlbe->mas7 = (hpaddr >> 32) & MAS7_RPN;
trace_kvm_stlb_write(index_of(tlbsel, esel), stlbe->mas1, stlbe->mas2,
stlbe->mas3, stlbe->mas7);
}
/* XXX only map the one-one case, for now use TLB0 */
static int kvmppc_e500_stlbe_map(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *gtlbe;
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
kvmppc_e500_shadow_map(vcpu_e500, get_tlb_eaddr(gtlbe),
get_tlb_raddr(gtlbe) >> PAGE_SHIFT,
gtlbe, tlbsel, esel);
return esel;
}
/* Caller must ensure that the specified guest TLB entry is safe to insert into
* the shadow TLB. */
/* XXX for both one-one and one-to-many , for now use TLB1 */
static int kvmppc_e500_tlb1_map(struct kvmppc_vcpu_e500 *vcpu_e500,
u64 gvaddr, gfn_t gfn, struct tlbe *gtlbe)
{
unsigned int victim;
victim = vcpu_e500->guest_tlb_nv[1]++;
if (unlikely(vcpu_e500->guest_tlb_nv[1] >= tlb1_max_shadow_size()))
vcpu_e500->guest_tlb_nv[1] = 0;
kvmppc_e500_shadow_map(vcpu_e500, gvaddr, gfn, gtlbe, 1, victim);
return victim;
}
/* Invalidate all guest kernel mappings when enter usermode,
* so that when they fault back in they will get the
* proper permission bits. */
void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode)
{
if (usermode) {
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int i;
/* XXX Replace loop with fancy data structures. */
for (i = 0; i < tlb1_max_shadow_size(); i++)
kvmppc_e500_stlbe_invalidate(vcpu_e500, 1, i);
_tlbil_all();
}
}
static int kvmppc_e500_gtlbe_invalidate(struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel, int esel)
{
struct tlbe *gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
if (unlikely(get_tlb_iprot(gtlbe)))
return -1;
if (tlbsel == 1) {
kvmppc_e500_tlb1_invalidate(vcpu_e500, get_tlb_eaddr(gtlbe),
get_tlb_end(gtlbe),
get_tlb_tid(gtlbe));
} else {
kvmppc_e500_stlbe_invalidate(vcpu_e500, tlbsel, esel);
}
gtlbe->mas1 = 0;
return 0;
}
int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
{
int esel;
if (value & MMUCSR0_TLB0FI)
for (esel = 0; esel < vcpu_e500->guest_tlb_size[0]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
if (value & MMUCSR0_TLB1FI)
for (esel = 0; esel < vcpu_e500->guest_tlb_size[1]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
_tlbil_all();
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
unsigned int ia;
int esel, tlbsel;
gva_t ea;
ea = ((ra) ? kvmppc_get_gpr(vcpu, ra) : 0) + kvmppc_get_gpr(vcpu, rb);
ia = (ea >> 2) & 0x1;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = (ea >> 3) & 0x1;
if (ia) {
/* invalidate all entries */
for (esel = 0; esel < vcpu_e500->guest_tlb_size[tlbsel]; esel++)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
} else {
ea &= 0xfffff000;
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
get_cur_pid(vcpu), -1);
if (esel >= 0)
kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
}
_tlbil_all();
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel, esel;
struct tlbe *gtlbe;
tlbsel = get_tlb_tlbsel(vcpu_e500);
esel = get_tlb_esel(vcpu_e500, tlbsel);
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
vcpu_e500->mas0 &= ~MAS0_NV(~0);
vcpu_e500->mas0 |= MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = gtlbe->mas1;
vcpu_e500->mas2 = gtlbe->mas2;
vcpu_e500->mas3 = gtlbe->mas3;
vcpu_e500->mas7 = gtlbe->mas7;
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int as = !!get_cur_sas(vcpu_e500);
unsigned int pid = get_cur_spid(vcpu_e500);
int esel, tlbsel;
struct tlbe *gtlbe = NULL;
gva_t ea;
ea = kvmppc_get_gpr(vcpu, rb);
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
if (esel >= 0) {
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
break;
}
}
if (gtlbe) {
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = gtlbe->mas1;
vcpu_e500->mas2 = gtlbe->mas2;
vcpu_e500->mas3 = gtlbe->mas3;
vcpu_e500->mas7 = gtlbe->mas7;
} else {
int victim;
/* since we only have two TLBs, only lower bit is used. */
tlbsel = vcpu_e500->mas4 >> 28 & 0x1;
victim = (tlbsel == 0) ? tlb0_get_next_victim(vcpu_e500) : 0;
vcpu_e500->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
| MAS0_NV(vcpu_e500->guest_tlb_nv[tlbsel]);
vcpu_e500->mas1 = (vcpu_e500->mas6 & MAS6_SPID0)
| (vcpu_e500->mas6 & (MAS6_SAS ? MAS1_TS : 0))
| (vcpu_e500->mas4 & MAS4_TSIZED(~0));
vcpu_e500->mas2 &= MAS2_EPN;
vcpu_e500->mas2 |= vcpu_e500->mas4 & MAS2_ATTRIB_MASK;
vcpu_e500->mas3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
vcpu_e500->mas7 = 0;
}
return EMULATE_DONE;
}
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
u64 eaddr;
u64 raddr;
u32 tid;
struct tlbe *gtlbe;
int tlbsel, esel, stlbsel, sesel;
tlbsel = get_tlb_tlbsel(vcpu_e500);
esel = get_tlb_esel(vcpu_e500, tlbsel);
gtlbe = &vcpu_e500->guest_tlb[tlbsel][esel];
if (get_tlb_v(gtlbe) && tlbsel == 1) {
eaddr = get_tlb_eaddr(gtlbe);
tid = get_tlb_tid(gtlbe);
kvmppc_e500_tlb1_invalidate(vcpu_e500, eaddr,
get_tlb_end(gtlbe), tid);
}
gtlbe->mas1 = vcpu_e500->mas1;
gtlbe->mas2 = vcpu_e500->mas2;
gtlbe->mas3 = vcpu_e500->mas3;
gtlbe->mas7 = vcpu_e500->mas7;
trace_kvm_gtlb_write(vcpu_e500->mas0, gtlbe->mas1, gtlbe->mas2,
gtlbe->mas3, gtlbe->mas7);
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
if (tlbe_is_host_safe(vcpu, gtlbe)) {
switch (tlbsel) {
case 0:
/* TLB0 */
gtlbe->mas1 &= ~MAS1_TSIZE(~0);
gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
stlbsel = 0;
sesel = kvmppc_e500_stlbe_map(vcpu_e500, 0, esel);
break;
case 1:
/* TLB1 */
eaddr = get_tlb_eaddr(gtlbe);
raddr = get_tlb_raddr(gtlbe);
/* Create a 4KB mapping on the host.
* If the guest wanted a large page,
* only the first 4KB is mapped here and the rest
* are mapped on the fly. */
stlbsel = 1;
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr,
raddr >> PAGE_SHIFT, gtlbe);
break;
default:
BUG();
}
write_host_tlbe(vcpu_e500, stlbsel, sesel);
}
return EMULATE_DONE;
}
int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
{
unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
}
int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
{
unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
}
void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
{
unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
}
void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
{
unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
}
gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
gva_t eaddr)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
struct tlbe *gtlbe =
&vcpu_e500->guest_tlb[tlbsel_of(index)][esel_of(index)];
u64 pgmask = get_tlb_bytes(gtlbe) - 1;
return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
}
void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel, i;
for (tlbsel = 0; tlbsel < 2; tlbsel++)
for (i = 0; i < vcpu_e500->guest_tlb_size[tlbsel]; i++)
kvmppc_e500_shadow_release(vcpu_e500, tlbsel, i);
/* discard all guest mapping */
_tlbil_all();
}
void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
unsigned int index)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int tlbsel = tlbsel_of(index);
int esel = esel_of(index);
int stlbsel, sesel;
switch (tlbsel) {
case 0:
stlbsel = 0;
sesel = esel;
break;
case 1: {
gfn_t gfn = gpaddr >> PAGE_SHIFT;
struct tlbe *gtlbe
= &vcpu_e500->guest_tlb[tlbsel][esel];
stlbsel = 1;
sesel = kvmppc_e500_tlb1_map(vcpu_e500, eaddr, gfn, gtlbe);
break;
}
default:
BUG();
break;
}
write_host_tlbe(vcpu_e500, stlbsel, sesel);
}
int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
gva_t eaddr, unsigned int pid, int as)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
int esel, tlbsel;
for (tlbsel = 0; tlbsel < 2; tlbsel++) {
esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
if (esel >= 0)
return index_of(tlbsel, esel);
}
return -1;
}
void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *vcpu_e500)
{
struct tlbe *tlbe;
/* Insert large initial mapping for guest. */
tlbe = &vcpu_e500->guest_tlb[1][0];
tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_256M);
tlbe->mas2 = 0;
tlbe->mas3 = E500_TLB_SUPER_PERM_MASK;
tlbe->mas7 = 0;
/* 4K map for serial output. Used by kernel wrapper. */
tlbe = &vcpu_e500->guest_tlb[1][1];
tlbe->mas1 = MAS1_VALID | MAS1_TSIZE(BOOK3E_PAGESZ_4K);
tlbe->mas2 = (0xe0004500 & 0xFFFFF000) | MAS2_I | MAS2_G;
tlbe->mas3 = (0xe0004500 & 0xFFFFF000) | E500_TLB_SUPER_PERM_MASK;
tlbe->mas7 = 0;
}
int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
{
tlb1_entry_num = mfspr(SPRN_TLB1CFG) & 0xFFF;
vcpu_e500->guest_tlb_size[0] = KVM_E500_TLB0_SIZE;
vcpu_e500->guest_tlb[0] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->guest_tlb[0] == NULL)
goto err_out;
vcpu_e500->shadow_tlb_size[0] = KVM_E500_TLB0_SIZE;
vcpu_e500->shadow_tlb[0] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->shadow_tlb[0] == NULL)
goto err_out_guest0;
vcpu_e500->guest_tlb_size[1] = KVM_E500_TLB1_SIZE;
vcpu_e500->guest_tlb[1] =
kzalloc(sizeof(struct tlbe) * KVM_E500_TLB1_SIZE, GFP_KERNEL);
if (vcpu_e500->guest_tlb[1] == NULL)
goto err_out_shadow0;
vcpu_e500->shadow_tlb_size[1] = tlb1_entry_num;
vcpu_e500->shadow_tlb[1] =
kzalloc(sizeof(struct tlbe) * tlb1_entry_num, GFP_KERNEL);
if (vcpu_e500->shadow_tlb[1] == NULL)
goto err_out_guest1;
vcpu_e500->shadow_pages[0] = (struct page **)
kzalloc(sizeof(struct page *) * KVM_E500_TLB0_SIZE, GFP_KERNEL);
if (vcpu_e500->shadow_pages[0] == NULL)
goto err_out_shadow1;
vcpu_e500->shadow_pages[1] = (struct page **)
kzalloc(sizeof(struct page *) * tlb1_entry_num, GFP_KERNEL);
if (vcpu_e500->shadow_pages[1] == NULL)
goto err_out_page0;
/* Init TLB configuration register */
vcpu_e500->tlb0cfg = mfspr(SPRN_TLB0CFG) & ~0xfffUL;
vcpu_e500->tlb0cfg |= vcpu_e500->guest_tlb_size[0];
vcpu_e500->tlb1cfg = mfspr(SPRN_TLB1CFG) & ~0xfffUL;
vcpu_e500->tlb1cfg |= vcpu_e500->guest_tlb_size[1];
return 0;
err_out_page0:
kfree(vcpu_e500->shadow_pages[0]);
err_out_shadow1:
kfree(vcpu_e500->shadow_tlb[1]);
err_out_guest1:
kfree(vcpu_e500->guest_tlb[1]);
err_out_shadow0:
kfree(vcpu_e500->shadow_tlb[0]);
err_out_guest0:
kfree(vcpu_e500->guest_tlb[0]);
err_out:
return -1;
}
void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
{
kfree(vcpu_e500->shadow_pages[1]);
kfree(vcpu_e500->shadow_pages[0]);
kfree(vcpu_e500->shadow_tlb[1]);
kfree(vcpu_e500->guest_tlb[1]);
kfree(vcpu_e500->shadow_tlb[0]);
kfree(vcpu_e500->guest_tlb[0]);
}
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