[PATCH 15/27] KVM: PPC: Expose magic page support to guest
From: Alexander Graf <hidden>
Date: 2010-07-01 10:43:07
Also in:
kvm
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> --- arch/powerpc/include/asm/kvm_para.h | 2 ++ arch/powerpc/kvm/powerpc.c | 11 +++++++++++ 2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/kvm_para.h b/arch/powerpc/include/asm/kvm_para.h
index 82131fc..3cae15d 100644
--- a/arch/powerpc/include/asm/kvm_para.h
+++ b/arch/powerpc/include/asm/kvm_para.h@@ -43,6 +43,8 @@ struct kvm_vcpu_arch_shared { #define KVM_SC_MAGIC_R0 0x4b564d52 /* "KVMR" */ #define KVM_SC_MAGIC_R3 0x554c455a /* "ULEZ" */ +#define KVM_FEATURE_MAGIC_PAGE 1 + #ifdef __KERNEL__ static inline int kvm_para_available(void)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 1ebb29e..0be119a 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c@@ -60,8 +60,19 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) } switch (nr) { + case KVM_HC_PPC_MAP_MAGIC_PAGE: + { + vcpu->arch.magic_page_pa = param1; + vcpu->arch.magic_page_ea = param2; + + r = 0; + break; + } case KVM_HC_FEATURES: r = 0; +#if !defined(CONFIG_KVM_440) /* XXX missing bits on 440 */ + r |= (1 << KVM_FEATURE_MAGIC_PAGE); +#endif break; default: r = -KVM_ENOSYS;
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1.6.0.2