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Small fixes for x86, slightly larger fixes for PPC, and a forgotten s390 patch. 

The PPC fixes are important because they fix breakage that is new in 3.15.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Small fixes for x86, slightly larger fixes for PPC, and a forgotten
  s390 patch.  The PPC fixes are important because they fix breakage
  that is new in 3.15"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: s390: announce irqfd capability
  KVM: x86: disable master clock if TSC is reset during suspend
  KVM: vmx: disable APIC virtualization in nested guests
  KVM guest: Make pv trampoline code executable
  KVM: PPC: Book3S: ifdef on CONFIG_KVM_BOOK3S_32_HANDLER for 32bit
  KVM: PPC: Book3S HV: Add missing code for transaction reclaim on guest exit
  KVM: PPC: Book3S: HV: make _PAGE_NUMA take effect
This commit is contained in:
Linus Torvalds 2014-05-28 08:08:03 -07:00
parent 9e3d633178 a4e91d04b8
commit 4efdedca93
11 changed files with 139 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/virtual/kvm/api.txt
View File

@ -2126,7 +2126,7 @@ into the hash PTE second double word).
4.75 KVM_IRQFD
Capability: KVM_CAP_IRQFD
Architectures: x86
Architectures: x86 s390
Type: vm ioctl
Parameters: struct kvm_irqfd (in)
Returns: 0 on success, -1 on error

11
arch/powerpc/include/asm/sections.h
View File

@ -39,6 +39,17 @@ static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
(unsigned long)_stext < end;
}
static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end)
{
#ifdef CONFIG_KVM_GUEST
extern char kvm_tmp[];
return start < (unsigned long)kvm_tmp &&
(unsigned long)&kvm_tmp[1024 * 1024] < end;
#else
return 0;
#endif
}
#undef dereference_function_descriptor
static inline void *dereference_function_descriptor(void *ptr)
{

2
arch/powerpc/kernel/kvm.c
View File

@ -74,7 +74,7 @@
#define KVM_INST_MTSRIN 0x7c0001e4
static bool kvm_patching_worked = true;
static char kvm_tmp[1024 * 1024];
char kvm_tmp[1024 * 1024];
static int kvm_tmp_index;
static inline void kvm_patch_ins(u32 *inst, u32 new_inst)

6
arch/powerpc/kvm/book3s.c
View File

@ -886,7 +886,7 @@ static int kvmppc_book3s_init(void)
r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
if (r)
return r;
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
r = kvmppc_book3s_init_pr();
#endif
return r;
@ -895,7 +895,7 @@ static int kvmppc_book3s_init(void)
static void kvmppc_book3s_exit(void)
{
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
kvmppc_book3s_exit_pr();
#endif
kvm_exit();
@ -905,7 +905,7 @@ module_init(kvmppc_book3s_init);
module_exit(kvmppc_book3s_exit);
/* On 32bit this is our one and only kernel module */
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
MODULE_ALIAS_MISCDEV(KVM_MINOR);
MODULE_ALIAS("devname:kvm");
#endif

2
arch/powerpc/kvm/book3s_hv_rm_mmu.c
View File

@ -234,7 +234,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
pte_size = psize;
pte = lookup_linux_pte_and_update(pgdir, hva, writing,
&pte_size);
if (pte_present(pte)) {
if (pte_present(pte) && !pte_numa(pte)) {
if (writing && !pte_write(pte))
/* make the actual HPTE be read-only */
ptel = hpte_make_readonly(ptel);

104
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View File

@ -1323,6 +1323,110 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
mr r3, r9
bl kvmppc_save_fp
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
BEGIN_FTR_SECTION
b 2f
END_FTR_SECTION_IFCLR(CPU_FTR_TM)
/* Turn on TM. */
mfmsr r8
li r0, 1
rldimi r8, r0, MSR_TM_LG, 63-MSR_TM_LG
mtmsrd r8
ld r5, VCPU_MSR(r9)
rldicl. r5, r5, 64 - MSR_TS_S_LG, 62
beq 1f /* TM not active in guest. */
li r3, TM_CAUSE_KVM_RESCHED
/* Clear the MSR RI since r1, r13 are all going to be foobar. */
li r5, 0
mtmsrd r5, 1
/* All GPRs are volatile at this point. */
TRECLAIM(R3)
/* Temporarily store r13 and r9 so we have some regs to play with */
SET_SCRATCH0(r13)
GET_PACA(r13)
std r9, PACATMSCRATCH(r13)
ld r9, HSTATE_KVM_VCPU(r13)
/* Get a few more GPRs free. */
std r29, VCPU_GPRS_TM(29)(r9)
std r30, VCPU_GPRS_TM(30)(r9)
std r31, VCPU_GPRS_TM(31)(r9)
/* Save away PPR and DSCR soon so don't run with user values. */
mfspr r31, SPRN_PPR
HMT_MEDIUM
mfspr r30, SPRN_DSCR
ld r29, HSTATE_DSCR(r13)
mtspr SPRN_DSCR, r29
/* Save all but r9, r13 & r29-r31 */
reg = 0
.rept 29
.if (reg != 9) && (reg != 13)
std reg, VCPU_GPRS_TM(reg)(r9)
.endif
reg = reg + 1
.endr
/* ... now save r13 */
GET_SCRATCH0(r4)
std r4, VCPU_GPRS_TM(13)(r9)
/* ... and save r9 */
ld r4, PACATMSCRATCH(r13)
std r4, VCPU_GPRS_TM(9)(r9)
/* Reload stack pointer and TOC. */
ld r1, HSTATE_HOST_R1(r13)
ld r2, PACATOC(r13)
/* Set MSR RI now we have r1 and r13 back. */
li r5, MSR_RI
mtmsrd r5, 1
/* Save away checkpinted SPRs. */
std r31, VCPU_PPR_TM(r9)
std r30, VCPU_DSCR_TM(r9)
mflr r5
mfcr r6
mfctr r7
mfspr r8, SPRN_AMR
mfspr r10, SPRN_TAR
std r5, VCPU_LR_TM(r9)
stw r6, VCPU_CR_TM(r9)
std r7, VCPU_CTR_TM(r9)
std r8, VCPU_AMR_TM(r9)
std r10, VCPU_TAR_TM(r9)
/* Restore r12 as trap number. */
lwz r12, VCPU_TRAP(r9)
/* Save FP/VSX. */
addi r3, r9, VCPU_FPRS_TM
bl .store_fp_state
addi r3, r9, VCPU_VRS_TM
bl .store_vr_state
mfspr r6, SPRN_VRSAVE
stw r6, VCPU_VRSAVE_TM(r9)
1:
/*
* We need to save these SPRs after the treclaim so that the software
* error code is recorded correctly in the TEXASR. Also the user may
* change these outside of a transaction, so they must always be
* context switched.
*/
mfspr r5, SPRN_TFHAR
mfspr r6, SPRN_TFIAR
mfspr r7, SPRN_TEXASR
std r5, VCPU_TFHAR(r9)
std r6, VCPU_TFIAR(r9)
std r7, VCPU_TEXASR(r9)
2:
#endif
/* Increment yield count if they have a VPA */
ld r8, VCPU_VPA(r9) /* do they have a VPA? */
cmpdi r8, 0

6
arch/powerpc/kvm/book3s_pr.c
View File

@ -1153,7 +1153,7 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
goto free_vcpu;
vcpu->arch.book3s = vcpu_book3s;
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
vcpu->arch.shadow_vcpu =
kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
if (!vcpu->arch.shadow_vcpu)
@ -1198,7 +1198,7 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
uninit_vcpu:
kvm_vcpu_uninit(vcpu);
free_shadow_vcpu:
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
kfree(vcpu->arch.shadow_vcpu);
free_vcpu3s:
#endif
@ -1215,7 +1215,7 @@ static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
kvm_vcpu_uninit(vcpu);
#ifdef CONFIG_KVM_BOOK3S_32
#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
kfree(vcpu->arch.shadow_vcpu);
#endif
vfree(vcpu_book3s);

4
arch/powerpc/mm/hash_utils_64.c
View File

@ -207,6 +207,10 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
if (overlaps_kernel_text(vaddr, vaddr + step))
tprot &= ~HPTE_R_N;
/* Make kvm guest trampolines executable */
if (overlaps_kvm_tmp(vaddr, vaddr + step))
tprot &= ~HPTE_R_N;
/*
* If relocatable, check if it overlaps interrupt vectors that
* are copied down to real 0. For relocatable kernel

1
arch/s390/kvm/kvm-s390.c
View File

@ -158,6 +158,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_ONE_REG:
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_S390_CSS_SUPPORT:
case KVM_CAP_IRQFD:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_ENABLE_CAP_VM:

7
arch/x86/kvm/vmx.c
View File

@ -7778,7 +7778,8 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
exec_control = vmcs12->pin_based_vm_exec_control;
exec_control |= vmcs_config.pin_based_exec_ctrl;
exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
exec_control &= ~(PIN_BASED_VMX_PREEMPTION_TIMER |
PIN_BASED_POSTED_INTR);
vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, exec_control);
vmx->nested.preemption_timer_expired = false;
@ -7815,7 +7816,9 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
if (!vmx->rdtscp_enabled)
exec_control &= ~SECONDARY_EXEC_RDTSCP;
/* Take the following fields only from vmcs12 */
exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
SECONDARY_EXEC_APIC_REGISTER_VIRT);
if (nested_cpu_has(vmcs12,
CPU_BASED_ACTIVATE_SECONDARY_CONTROLS))
exec_control |= vmcs12->secondary_vm_exec_control;

6
arch/x86/kvm/x86.c
View File

@ -106,6 +106,8 @@ EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz);
static u32 tsc_tolerance_ppm = 250;
module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR);
static bool backwards_tsc_observed = false;
#define KVM_NR_SHARED_MSRS 16
struct kvm_shared_msrs_global {
@ -1486,7 +1488,8 @@ static void pvclock_update_vm_gtod_copy(struct kvm *kvm)
&ka->master_kernel_ns,
&ka->master_cycle_now);
ka->use_master_clock = host_tsc_clocksource & vcpus_matched;
ka->use_master_clock = host_tsc_clocksource && vcpus_matched
&& !backwards_tsc_observed;
if (ka->use_master_clock)
atomic_set(&kvm_guest_has_master_clock, 1);
@ -6945,6 +6948,7 @@ int kvm_arch_hardware_enable(void *garbage)
*/
if (backwards_tsc) {
u64 delta_cyc = max_tsc - local_tsc;
backwards_tsc_observed = true;
list_for_each_entry(kvm, &vm_list, vm_list) {
kvm_for_each_vcpu(i, vcpu, kvm) {
vcpu->arch.tsc_offset_adjustment += delta_cyc;