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Merge branch 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Browse Source 
* 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Remove port 80 passthrough
  KVM: Make EFER reads safe when EFER does not exist
  KVM: Fix NX support reporting
  KVM: SVM: Fix cross vendor migration issue with unusable bit
This commit is contained in:
Linus Torvalds 2009-05-13 16:32:30 -07:00
commit f6cab83d77
2 changed files with 8 additions and 6 deletions
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8
arch/x86/kvm/svm.c
View File

@ -411,7 +411,6 @@ static __init int svm_hardware_setup(void)
iopm_va = page_address(iopm_pages); iopm_va = page_address(iopm_pages);
memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
if (boot_cpu_has(X86_FEATURE_NX)) if (boot_cpu_has(X86_FEATURE_NX))
@ -796,6 +795,11 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
/* AMD's VMCB does not have an explicit unusable field, so emulate it
* for cross vendor migration purposes by "not present"
*/
var->unusable = !var->present || (var->type == 0);
switch (seg) { switch (seg) {
case VCPU_SREG_CS: case VCPU_SREG_CS:
/* /*
@ -827,8 +831,6 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
var->type |= 0x1; var->type |= 0x1;
break; break;
} }
var->unusable = !var->present;
} }
static int svm_get_cpl(struct kvm_vcpu *vcpu) static int svm_get_cpl(struct kvm_vcpu *vcpu)

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

@ -1121,9 +1121,9 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
static int is_efer_nx(void) static int is_efer_nx(void)
{ {
u64 efer; unsigned long long efer = 0;
rdmsrl(MSR_EFER, efer); rdmsrl_safe(MSR_EFER, &efer);
return efer & EFER_NX; return efer & EFER_NX;
} }
@ -1259,7 +1259,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) |
bit(X86_FEATURE_SYSCALL) | bit(X86_FEATURE_SYSCALL) |
(bit(X86_FEATURE_NX) && is_efer_nx()) | (is_efer_nx() ? bit(X86_FEATURE_NX) : 0) |
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
bit(X86_FEATURE_LM) | bit(X86_FEATURE_LM) |
#endif #endif