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Commit 6f00e68f authored by Avi Kivity's avatar Avi Kivity Committed by Linus Torvalds
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[PATCH] KVM: Emulate IA32_MISC_ENABLE msr 



This allows netbsd 3.1 i386 to get further along installing.

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bce66ca4

drivers/kvm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -242,6 +242,7 @@ struct kvm_vcpu { 
	u64 pdptrs[4]; /* pae */

	u64 shadow_efer;

	u64 apic_base;

	u64 ia32_misc_enable_msr;

	int nmsrs;

	struct vmx_msr_entry *guest_msrs;

	struct vmx_msr_entry *host_msrs;

drivers/kvm/kvm_main.c

+16 −1
Original line number Diff line number Diff line
@@ -1226,6 +1226,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) 
	case MSR_IA32_APICBASE:

		data = vcpu->apic_base;

		break;

	case MSR_IA32_MISC_ENABLE:

		data = vcpu->ia32_misc_enable_msr;

		break;

#ifdef CONFIG_X86_64

	case MSR_EFER:

		data = vcpu->shadow_efer;
@@ -1297,6 +1300,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) 
	case MSR_IA32_APICBASE:

		vcpu->apic_base = data;

		break;

	case MSR_IA32_MISC_ENABLE:

		vcpu->ia32_misc_enable_msr = data;

		break;

	default:

		printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);

		return 1;
@@ -1600,6 +1606,10 @@ static u32 msrs_to_save[] = { 


static unsigned num_msrs_to_save;



static u32 emulated_msrs[] = {

	MSR_IA32_MISC_ENABLE,

};



static __init void kvm_init_msr_list(void)

{

	u32 dummy[2];
@@ -1925,7 +1935,7 @@ static long kvm_dev_ioctl(struct file *filp, 
		if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))

			goto out;

		n = msr_list.nmsrs;

		msr_list.nmsrs = num_msrs_to_save;

		msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);

		if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))

			goto out;

		r = -E2BIG;
@@ -1935,6 +1945,11 @@ static long kvm_dev_ioctl(struct file *filp, 
		if (copy_to_user(user_msr_list->indices, &msrs_to_save,

				 num_msrs_to_save * sizeof(u32)))

			goto out;

		if (copy_to_user(user_msr_list->indices

				 + num_msrs_to_save * sizeof(u32),

				 &emulated_msrs,

				 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))

			goto out;

		r = 0;

		break;

	}