| Message ID | 1408637291-18533-4-git-send-email-rkrcmar@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 08/21/2014 09:38 PM, Radim Kr?má? wrote: > Change PLE window into per-VCPU variable, seeded from module parameter, > to allow greater flexibility. > > Brings in a small overhead on every vmentry. > > Signed-off-by: Radim Kr?má? <rkrcmar@redhat.com> with intelligent update in patch 7 Reviewed-by: Raghavendra KT <raghavendra.kt@linux.vnet.ibm.com> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 2b306f9..18e0e52 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -484,6 +484,9 @@ struct vcpu_vmx { /* Support for a guest hypervisor (nested VMX) */ struct nested_vmx nested; + + /* Dynamic PLE window. */ + int ple_window; }; enum segment_cache_field { @@ -4402,7 +4405,7 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) if (ple_gap) { vmcs_write32(PLE_GAP, ple_gap); - vmcs_write32(PLE_WINDOW, ple_window); + vmx->ple_window = ple_window; } vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); @@ -7387,6 +7390,9 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) if (vmx->emulation_required) return; + if (ple_gap) + vmcs_write32(PLE_WINDOW, vmx->ple_window); + if (vmx->nested.sync_shadow_vmcs) { copy_vmcs12_to_shadow(vmx); vmx->nested.sync_shadow_vmcs = false;
Change PLE window into per-VCPU variable, seeded from module parameter, to allow greater flexibility. Brings in a small overhead on every vmentry. Signed-off-by: Radim Kr?má? <rkrcmar@redhat.com> --- arch/x86/kvm/vmx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)