From e693d71b46e64536581bf4884434fc1b8797e96f Mon Sep 17 00:00:00 2001 From: Eli Collins Date: Sun, 1 Jun 2008 20:24:40 -0700 Subject: [PATCH] KVM: VMX: Clear CR4.VMXE in hardware_disable Clear CR4.VMXE in hardware_disable. There's no reason to leave it set after doing a VMXOFF. VMware Workstation 6.5 checks CR4.VMXE as a proxy for whether the CPU is in VMX mode, so leaving VMXE set means we'll refuse to power on. With this change the user can power on after unloading the kvm-intel module. I tested on kvm-67 and kvm-69. Signed-off-by: Eli Collins Signed-off-by: Avi Kivity --- arch/x86/kvm/vmx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 96445f34151..02efbe75f31 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1036,6 +1036,7 @@ static void hardware_enable(void *garbage) static void hardware_disable(void *garbage) { asm volatile (ASM_VMX_VMXOFF : : : "cc"); + write_cr4(read_cr4() & ~X86_CR4_VMXE); } static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, -- 2.41.1