From eec4b140c924b4c650e9a89e01d223266490e325 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 5 May 2010 16:04:44 +0200 Subject: [PATCH] KVM: SVM: Allow EFER.LMSLE to be set with nested svm This patch enables setting of efer bit 13 which is allowed in all SVM capable processors. This is necessary for the SLES11 version of Xen 4.0 to boot with nested svm. Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- arch/x86/include/asm/msr-index.h | 2 ++ arch/x86/kvm/svm.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 8c7ae43..509a421 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -20,6 +20,7 @@ #define _EFER_LMA 10 /* Long mode active (read-only) */ #define _EFER_NX 11 /* No execute enable */ #define _EFER_SVME 12 /* Enable virtualization */ +#define _EFER_LMSLE 13 /* Long Mode Segment Limit Enable */ #define _EFER_FFXSR 14 /* Enable Fast FXSAVE/FXRSTOR */ #define EFER_SCE (1<<_EFER_SCE) @@ -27,6 +28,7 @@ #define EFER_LMA (1<<_EFER_LMA) #define EFER_NX (1<<_EFER_NX) #define EFER_SVME (1<<_EFER_SVME) +#define EFER_LMSLE (1<<_EFER_LMSLE) #define EFER_FFXSR (1<<_EFER_FFXSR) /* Intel MSRs. Some also available on other CPUs */ diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 685cfff..41fe038 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -640,7 +640,7 @@ static __init int svm_hardware_setup(void) if (nested) { printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); - kvm_enable_efer_bits(EFER_SVME); + kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE); } for_each_possible_cpu(cpu) { -- 2.7.4