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| author | Ilias Stamatis <ilstam@amazon.com> | 2021-05-26 19:44:13 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-17 13:09:28 -0400 |
| commit | 307a94c721fed1aaaeee68115df6f7fb8193b23f (patch) | |
| tree | 5bc5f924803a7466af8b3682cbe8b5f5b5b9445e /arch/x86/kvm/svm/svm.c | |
| parent | 3c0f99366e34c1b45e4908e151089a8bf93fbe71 (diff) | |
| download | lwn-307a94c721fed1aaaeee68115df6f7fb8193b23f.tar.gz lwn-307a94c721fed1aaaeee68115df6f7fb8193b23f.zip | |
KVM: X86: Add functions for retrieving L2 TSC fields from common code
In order to implement as much of the nested TSC scaling logic as
possible in common code, we need these vendor callbacks for retrieving
the TSC offset and the TSC multiplier that L1 has set for L2.
Signed-off-by: Ilias Stamatis <ilstam@amazon.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210526184418.28881-7-ilstam@amazon.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 8c3918a11826..95ae2734760e 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1080,6 +1080,18 @@ static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) seg->base = 0; } +static u64 svm_get_l2_tsc_offset(struct kvm_vcpu *vcpu) +{ + struct vcpu_svm *svm = to_svm(vcpu); + + return svm->nested.ctl.tsc_offset; +} + +static u64 svm_get_l2_tsc_multiplier(struct kvm_vcpu *vcpu) +{ + return kvm_default_tsc_scaling_ratio; +} + static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) { struct vcpu_svm *svm = to_svm(vcpu); @@ -4524,6 +4536,8 @@ static struct kvm_x86_ops svm_x86_ops __initdata = { .has_wbinvd_exit = svm_has_wbinvd_exit, + .get_l2_tsc_offset = svm_get_l2_tsc_offset, + .get_l2_tsc_multiplier = svm_get_l2_tsc_multiplier, .write_l1_tsc_offset = svm_write_l1_tsc_offset, .load_mmu_pgd = svm_load_mmu_pgd, |