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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/vmx.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/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e19c7a5473d5..aabe3334d064 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1184,6 +1184,11 @@ static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) vmcs_write64(TSC_OFFSET, offset + adjustment); } +static u64 vmx_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) +{ + return target_tsc - native_read_tsc(); +} + /* * Reads an msr value (of 'msr_index') into 'pdata'. * Returns 0 on success, non-0 otherwise. @@ -4510,6 +4515,7 @@ static struct kvm_x86_ops vmx_x86_ops = { .set_tsc_khz = vmx_set_tsc_khz, .write_tsc_offset = vmx_write_tsc_offset, .adjust_tsc_offset = vmx_adjust_tsc_offset, + .compute_tsc_offset = vmx_compute_tsc_offset, .set_tdp_cr3 = vmx_set_cr3, |