From 4051b18801f5b47bb0369feefdc80e57819d0ddf Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Fri, 25 Mar 2011 09:44:49 +0100 Subject: KVM: X86: Implement call-back to propagate virtual_tsc_khz This patch implements a call-back into the architecture code to allow the propagation of changes to the virtual tsc_khz of the vcpu. On SVM it updates the tsc_ratio variable, on VMX it does nothing. Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- arch/x86/kvm/vmx.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/x86/kvm/vmx.c') diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 3dfefe3bcd05..e19c7a5473d5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1160,6 +1160,16 @@ static u64 guest_read_tsc(void) return host_tsc + tsc_offset; } +/* + * Empty call-back. Needs to be implemented when VMX enables the SET_TSC_KHZ + * ioctl. In this case the call-back should update internal vmx state to make + * the changes effective. + */ +static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) +{ + /* Nothing to do here */ +} + /* * writes 'offset' into guest's timestamp counter offset register */ @@ -4497,6 +4507,7 @@ static struct kvm_x86_ops vmx_x86_ops = { .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, + .set_tsc_khz = vmx_set_tsc_khz, .write_tsc_offset = vmx_write_tsc_offset, .adjust_tsc_offset = vmx_adjust_tsc_offset, -- cgit v1.2.2