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-rw-r--r--Documentation/virtual/kvm/ppc-pv.txt8
-rw-r--r--arch/powerpc/include/asm/kvm_ppc.h1
-rw-r--r--arch/powerpc/kvm/booke.c11
-rw-r--r--arch/powerpc/kvm/e500_tlb.c22
-rw-r--r--arch/powerpc/kvm/powerpc.c3
5 files changed, 40 insertions, 5 deletions
diff --git a/Documentation/virtual/kvm/ppc-pv.txt b/Documentation/virtual/kvm/ppc-pv.txt
index 3ab969c5904..2b7ce190cde 100644
--- a/Documentation/virtual/kvm/ppc-pv.txt
+++ b/Documentation/virtual/kvm/ppc-pv.txt
@@ -68,9 +68,11 @@ page that contains parts of supervisor visible register state. The guest can
map this shared page using the KVM hypercall KVM_HC_PPC_MAP_MAGIC_PAGE.
With this hypercall issued the guest always gets the magic page mapped at the
-desired location in effective and physical address space. For now, we always
-map the page to -4096. This way we can access it using absolute load and store
-functions. The following instruction reads the first field of the magic page:
+desired location. The first parameter indicates the effective address when the
+MMU is enabled. The second parameter indicates the address in real mode, if
+applicable to the target. For now, we always map the page to -4096. This way we
+can access it using absolute load and store functions. The following
+instruction reads the first field of the magic page:
ld rX, -4096(0)
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 9345238edec..c662f140283 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -109,6 +109,7 @@ extern void kvmppc_booke_exit(void);
extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
+extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
/*
* Cuts out inst bits with ordering according to spec.
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 0ecbecb2f7c..4538956daec 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -472,6 +472,17 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
gpa_t gpaddr;
gfn_t gfn;
+#ifdef CONFIG_KVM_E500
+ if (!(vcpu->arch.shared->msr & MSR_PR) &&
+ (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
+ kvmppc_map_magic(vcpu);
+ kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
+ r = RESUME_GUEST;
+
+ break;
+ }
+#endif
+
/* Check the guest TLB. */
gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
if (gtlb_index < 0) {
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index 7f808c52e64..c09e642ee53 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -76,7 +76,8 @@ static inline unsigned int tlb0_get_next_victim(
static inline unsigned int tlb1_max_shadow_size(void)
{
- return tlb1_entry_num - tlbcam_index;
+ /* reserve one entry for magic page */
+ return tlb1_entry_num - tlbcam_index - 1;
}
static inline int tlbe_is_writable(struct tlbe *tlbe)
@@ -142,6 +143,25 @@ static inline void write_host_tlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
}
}
+void kvmppc_map_magic(struct kvm_vcpu *vcpu)
+{
+ struct tlbe magic;
+ ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
+ pfn_t pfn;
+
+ pfn = (pfn_t)virt_to_phys((void *)shared_page) >> PAGE_SHIFT;
+ get_page(pfn_to_page(pfn));
+
+ magic.mas1 = MAS1_VALID | MAS1_TS |
+ MAS1_TSIZE(BOOK3E_PAGESZ_4K);
+ magic.mas2 = vcpu->arch.magic_page_ea | MAS2_M;
+ magic.mas3 = (pfn << PAGE_SHIFT) |
+ MAS3_SW | MAS3_SR | MAS3_UW | MAS3_UR;
+ magic.mas7 = pfn >> (32 - PAGE_SHIFT);
+
+ __write_host_tlbe(&magic, MAS0_TLBSEL(1) | MAS0_ESEL(tlbcam_index));
+}
+
void kvmppc_e500_tlb_load(struct kvm_vcpu *vcpu, int cpu)
{
}
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 616dd516ca1..24e2b64b6a4 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -73,7 +73,8 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
}
case HC_VENDOR_KVM | KVM_HC_FEATURES:
r = HC_EV_SUCCESS;
-#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
+#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
+ /* XXX Missing magic page on 44x */
r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif