summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/svm/nested.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kvm/svm/nested.c')
-rw-r--r--arch/x86/kvm/svm/nested.c52
1 files changed, 42 insertions, 10 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 510b833cbd39..f8b7bc04b3e7 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -238,6 +238,18 @@ static bool nested_svm_check_bitmap_pa(struct kvm_vcpu *vcpu, u64 pa, u32 size)
kvm_vcpu_is_legal_gpa(vcpu, addr + size - 1);
}
+static bool nested_svm_check_tlb_ctl(struct kvm_vcpu *vcpu, u8 tlb_ctl)
+{
+ /* Nested FLUSHBYASID is not supported yet. */
+ switch(tlb_ctl) {
+ case TLB_CONTROL_DO_NOTHING:
+ case TLB_CONTROL_FLUSH_ALL_ASID:
+ return true;
+ default:
+ return false;
+ }
+}
+
static bool nested_vmcb_check_controls(struct kvm_vcpu *vcpu,
struct vmcb_control_area *control)
{
@@ -257,6 +269,9 @@ static bool nested_vmcb_check_controls(struct kvm_vcpu *vcpu,
IOPM_SIZE)))
return false;
+ if (CC(!nested_svm_check_tlb_ctl(vcpu, control->tlb_ctl)))
+ return false;
+
return true;
}
@@ -538,8 +553,17 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm)
if (nested_npt_enabled(svm))
nested_svm_init_mmu_context(vcpu);
- svm->vmcb->control.tsc_offset = vcpu->arch.tsc_offset =
- vcpu->arch.l1_tsc_offset + svm->nested.ctl.tsc_offset;
+ vcpu->arch.tsc_offset = kvm_calc_nested_tsc_offset(
+ vcpu->arch.l1_tsc_offset,
+ svm->nested.ctl.tsc_offset,
+ svm->tsc_ratio_msr);
+
+ svm->vmcb->control.tsc_offset = vcpu->arch.tsc_offset;
+
+ if (svm->tsc_ratio_msr != kvm_default_tsc_scaling_ratio) {
+ WARN_ON(!svm->tsc_scaling_enabled);
+ nested_svm_update_tsc_ratio_msr(vcpu);
+ }
svm->vmcb->control.int_ctl =
(svm->nested.ctl.int_ctl & int_ctl_vmcb12_bits) |
@@ -550,9 +574,6 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm)
svm->vmcb->control.event_inj = svm->nested.ctl.event_inj;
svm->vmcb->control.event_inj_err = svm->nested.ctl.event_inj_err;
- svm->vmcb->control.pause_filter_count = svm->nested.ctl.pause_filter_count;
- svm->vmcb->control.pause_filter_thresh = svm->nested.ctl.pause_filter_thresh;
-
nested_svm_transition_tlb_flush(vcpu);
/* Enter Guest-Mode */
@@ -810,11 +831,6 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
vmcb12->control.event_inj = svm->nested.ctl.event_inj;
vmcb12->control.event_inj_err = svm->nested.ctl.event_inj_err;
- vmcb12->control.pause_filter_count =
- svm->vmcb->control.pause_filter_count;
- vmcb12->control.pause_filter_thresh =
- svm->vmcb->control.pause_filter_thresh;
-
nested_svm_copy_common_state(svm->nested.vmcb02.ptr, svm->vmcb01.ptr);
svm_switch_vmcb(svm, &svm->vmcb01);
@@ -832,6 +848,12 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
}
+ if (svm->tsc_ratio_msr != kvm_default_tsc_scaling_ratio) {
+ WARN_ON(!svm->tsc_scaling_enabled);
+ vcpu->arch.tsc_scaling_ratio = vcpu->arch.l1_tsc_scaling_ratio;
+ svm_write_tsc_multiplier(vcpu, vcpu->arch.tsc_scaling_ratio);
+ }
+
svm->nested.ctl.nested_cr3 = 0;
/*
@@ -1219,6 +1241,16 @@ int nested_svm_exit_special(struct vcpu_svm *svm)
return NESTED_EXIT_CONTINUE;
}
+void nested_svm_update_tsc_ratio_msr(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ vcpu->arch.tsc_scaling_ratio =
+ kvm_calc_nested_tsc_multiplier(vcpu->arch.l1_tsc_scaling_ratio,
+ svm->tsc_ratio_msr);
+ svm_write_tsc_multiplier(vcpu, vcpu->arch.tsc_scaling_ratio);
+}
+
static int svm_get_nested_state(struct kvm_vcpu *vcpu,
struct kvm_nested_state __user *user_kvm_nested_state,
u32 user_data_size)