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KVM: VMX: unify SECONDARY_VM_EXEC_CONTROL update 

Unify the update in vmx_cpuid_update()

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
[Rewrite to use vmcs_set_secondary_exec_control. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiao Guangrong 2015-09-09 14:05:55 +08:00 committed by Paolo Bonzini
parent 8b97265a15
commit feda805fe7
1 changed files with 25 additions and 10 deletions
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35
arch/x86/kvm/vmx.c
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@ -8668,23 +8668,38 @@ static int vmx_get_lpage_level(void)
return PT_PDPE_LEVEL;
}
static void vmcs_set_secondary_exec_control(u32 new_ctl)
{
/*
* These bits in the secondary execution controls field
* are dynamic, the others are mostly based on the hypervisor
* architecture and the guest's CPUID. Do not touch the
* dynamic bits.
*/
u32 mask =
SECONDARY_EXEC_SHADOW_VMCS |
SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
u32 cur_ctl = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
(new_ctl & ~mask) | (cur_ctl & mask));
}
static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
{
struct kvm_cpuid_entry2 *best;
struct vcpu_vmx *vmx = to_vmx(vcpu);
u32 exec_control;
u32 secondary_exec_ctl = vmx_secondary_exec_control(vmx);
vmx->rdtscp_enabled = false;
if (vmx_rdtscp_supported()) {
exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
vmx->rdtscp_enabled = true;
else {
exec_control &= ~SECONDARY_EXEC_RDTSCP;
vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
exec_control);
}
else
secondary_exec_ctl &= ~SECONDARY_EXEC_RDTSCP;
if (nested) {
if (vmx->rdtscp_enabled)
@ -8701,14 +8716,14 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
if (vmx_invpcid_supported() &&
(!best || !(best->ebx & bit(X86_FEATURE_INVPCID)) ||
!guest_cpuid_has_pcid(vcpu))) {
exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
secondary_exec_ctl &= ~SECONDARY_EXEC_ENABLE_INVPCID;
if (best)
best->ebx &= ~bit(X86_FEATURE_INVPCID);
}
vmcs_set_secondary_exec_control(secondary_exec_ctl);
if (static_cpu_has(X86_FEATURE_PCOMMIT) && nested) {
if (guest_cpuid_has_pcommit(vcpu))
vmx->nested.nested_vmx_secondary_ctls_high |=