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authorJoerg Roedel <joerg.roedel@amd.com>2007-03-30 10:02:14 -0400
committerAvi Kivity <avi@qumranet.com>2007-05-03 03:52:28 -0400
commit80b7706e4cbaa51d65bd6fea83bd0e59856f50e9 (patch)
treec688c8b9cd07c2555facd657e8e8e3ed508b93be /drivers/kvm/svm.c
parentb8836737d92c139be770eae3d6574e33d1224caf (diff)
KVM: SVM: enable LBRV virtualization if available
This patch enables the virtualization of the last branch record MSRs on SVM if this feature is available in hardware. It also introduces a small and simple check feature for specific SVM extensions. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/svm.c')
-rw-r--r--drivers/kvm/svm.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 303e95957e7b..b7e1410e4007 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -44,6 +44,10 @@ MODULE_LICENSE("GPL");
44#define KVM_EFER_LMA (1 << 10) 44#define KVM_EFER_LMA (1 << 10)
45#define KVM_EFER_LME (1 << 8) 45#define KVM_EFER_LME (1 << 8)
46 46
47#define SVM_FEATURE_NPT (1 << 0)
48#define SVM_FEATURE_LBRV (1 << 1)
49#define SVM_DEATURE_SVML (1 << 2)
50
47unsigned long iopm_base; 51unsigned long iopm_base;
48unsigned long msrpm_base; 52unsigned long msrpm_base;
49 53
@@ -68,6 +72,7 @@ struct svm_cpu_data {
68}; 72};
69 73
70static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); 74static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
75static uint32_t svm_features;
71 76
72struct svm_init_data { 77struct svm_init_data {
73 int cpu; 78 int cpu;
@@ -82,6 +87,11 @@ static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
82 87
83#define MAX_INST_SIZE 15 88#define MAX_INST_SIZE 15
84 89
90static inline u32 svm_has(u32 feat)
91{
92 return svm_features & feat;
93}
94
85static unsigned get_addr_size(struct kvm_vcpu *vcpu) 95static unsigned get_addr_size(struct kvm_vcpu *vcpu)
86{ 96{
87 struct vmcb_save_area *sa = &vcpu->svm->vmcb->save; 97 struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
@@ -302,6 +312,7 @@ static void svm_hardware_enable(void *garbage)
302 svm_data->asid_generation = 1; 312 svm_data->asid_generation = 1;
303 svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; 313 svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
304 svm_data->next_asid = svm_data->max_asid + 1; 314 svm_data->next_asid = svm_data->max_asid + 1;
315 svm_features = cpuid_edx(SVM_CPUID_FUNC);
305 316
306 asm volatile ( "sgdt %0" : "=m"(gdt_descr) ); 317 asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
307 gdt = (struct desc_struct *)gdt_descr.address; 318 gdt = (struct desc_struct *)gdt_descr.address;
@@ -511,6 +522,8 @@ static void init_vmcb(struct vmcb *vmcb)
511 control->msrpm_base_pa = msrpm_base; 522 control->msrpm_base_pa = msrpm_base;
512 control->tsc_offset = 0; 523 control->tsc_offset = 0;
513 control->int_ctl = V_INTR_MASKING_MASK; 524 control->int_ctl = V_INTR_MASKING_MASK;
525 if (svm_has(SVM_FEATURE_LBRV))
526 control->lbr_ctl = 1ULL;
514 527
515 init_seg(&save->es); 528 init_seg(&save->es);
516 init_seg(&save->ss); 529 init_seg(&save->ss);