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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-03-25 09:44:50 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-11 07:57:05 -0400 |
| commit | 857e40999e35906baa367a79137019912cfb5434 (patch) | |
| tree | eacae3e4ccffd38b3e6a55b9bc6afdc7ae2c5e9a /arch/x86/kvm/svm.c | |
| parent | 4051b18801f5b47bb0369feefdc80e57819d0ddf (diff) | |
| download | lwn-857e40999e35906baa367a79137019912cfb5434.tar.gz lwn-857e40999e35906baa367a79137019912cfb5434.zip | |
KVM: X86: Delegate tsc-offset calculation to architecture code
With TSC scaling in SVM the tsc-offset needs to be
calculated differently. This patch propagates this
calculation into the architecture specific modules so that
this complexity can be handled there.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index a39fde4f5fe8..8c4549bef4ed 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -943,6 +943,15 @@ static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) mark_dirty(svm->vmcb, VMCB_INTERCEPTS); } +static u64 svm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) +{ + u64 tsc; + + tsc = svm_scale_tsc(vcpu, native_read_tsc()); + + return target_tsc - tsc; +} + static void init_vmcb(struct vcpu_svm *svm) { struct vmcb_control_area *control = &svm->vmcb->control; @@ -4194,6 +4203,7 @@ static struct kvm_x86_ops svm_x86_ops = { .set_tsc_khz = svm_set_tsc_khz, .write_tsc_offset = svm_write_tsc_offset, .adjust_tsc_offset = svm_adjust_tsc_offset, + .compute_tsc_offset = svm_compute_tsc_offset, .set_tdp_cr3 = set_tdp_cr3, |