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KVM: PPC: Expose magic page support to guest

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Now that we have the shared page in place and the MMU code knows about
the magic page, we can expose that capability to the guest!

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-07-29 14:47:55 +02:00 committed by Avi Kivity
parent e8508940a8
commit 5fc87407b5
2 changed files with 13 additions and 0 deletions
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2
arch/powerpc/include/asm/kvm_para.h
View File

@ -45,6 +45,8 @@ struct kvm_vcpu_arch_shared {
#define HC_EV_SUCCESS 0
#define HC_EV_UNIMPLEMENTED 12
#define KVM_FEATURE_MAGIC_PAGE 1
#ifdef __KERNEL__
#ifdef CONFIG_KVM_GUEST

11
arch/powerpc/kvm/powerpc.c
View File

@ -61,8 +61,19 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
}
switch (nr) {
case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
{
vcpu->arch.magic_page_pa = param1;
vcpu->arch.magic_page_ea = param2;
r = HC_EV_SUCCESS;
break;
}
case HC_VENDOR_KVM | KVM_HC_FEATURES:
r = HC_EV_SUCCESS;
#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
/* Second return value is in r4 */
kvmppc_set_gpr(vcpu, 4, r2);