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authorJoerg Roedel <joerg.roedel@amd.com>2011-03-25 09:44:50 +0100
committerAvi Kivity <avi@redhat.com>2011-05-11 07:57:05 -0400
commit857e40999e35906baa367a79137019912cfb5434 (patch)
treeeacae3e4ccffd38b3e6a55b9bc6afdc7ae2c5e9a /arch/x86/kvm/svm.c
parent4051b18801f5b47bb0369feefdc80e57819d0ddf (diff)
downloadlinux-857e40999e35906baa367a79137019912cfb5434.tar.bz2
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.c10
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,