KVM: PPC: Expose magic page support to guest
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>
diff --git a/arch/powerpc/include/asm/kvm_para.h b/arch/powerpc/include/asm/kvm_para.h
index 0653b0d..7438ab3 100644
--- a/arch/powerpc/include/asm/kvm_para.h
+++ b/arch/powerpc/include/asm/kvm_para.h
@@ -45,6 +45,8 @@
#define HC_EV_SUCCESS 0
#define HC_EV_UNIMPLEMENTED 12
+#define KVM_FEATURE_MAGIC_PAGE 1
+
#ifdef __KERNEL__
#ifdef CONFIG_KVM_GUEST
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index a4cf4b4..fecfe04 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -61,8 +61,19 @@
}
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);