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Diffstat (limited to 'arch/powerpc/kvm/44x_tlb.c')
-rw-r--r--arch/powerpc/kvm/44x_tlb.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c
index 2981ebea3d1..ff16d0e3843 100644
--- a/arch/powerpc/kvm/44x_tlb.c
+++ b/arch/powerpc/kvm/44x_tlb.c
@@ -73,6 +73,25 @@ static inline void kvmppc_44x_tlbie(unsigned int index)
);
}
+static inline void kvmppc_44x_tlbre(unsigned int index,
+ struct kvmppc_44x_tlbe *tlbe)
+{
+ asm volatile(
+ "tlbre %[word0], %[index], 0\n"
+ "mfspr %[tid], %[sprn_mmucr]\n"
+ "andi. %[tid], %[tid], 0xff\n"
+ "tlbre %[word1], %[index], 1\n"
+ "tlbre %[word2], %[index], 2\n"
+ : [word0] "=r"(tlbe->word0),
+ [word1] "=r"(tlbe->word1),
+ [word2] "=r"(tlbe->word2),
+ [tid] "=r"(tlbe->tid)
+ : [index] "r"(index),
+ [sprn_mmucr] "i"(SPRN_MMUCR)
+ : "cc"
+ );
+}
+
static inline void kvmppc_44x_tlbwe(unsigned int index,
struct kvmppc_44x_tlbe *stlbe)
{
@@ -116,6 +135,44 @@ static u32 kvmppc_44x_tlb_shadow_attrib(u32 attrib, int usermode)
return attrib;
}
+/* Load shadow TLB back into hardware. */
+void kvmppc_44x_tlb_load(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
+ int i;
+
+ for (i = 0; i <= tlb_44x_hwater; i++) {
+ struct kvmppc_44x_tlbe *stlbe = &vcpu_44x->shadow_tlb[i];
+
+ if (get_tlb_v(stlbe) && get_tlb_ts(stlbe))
+ kvmppc_44x_tlbwe(i, stlbe);
+ }
+}
+
+static void kvmppc_44x_tlbe_set_modified(struct kvmppc_vcpu_44x *vcpu_44x,
+ unsigned int i)
+{
+ vcpu_44x->shadow_tlb_mod[i] = 1;
+}
+
+/* Save hardware TLB to the vcpu, and invalidate all guest mappings. */
+void kvmppc_44x_tlb_put(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
+ int i;
+
+ for (i = 0; i <= tlb_44x_hwater; i++) {
+ struct kvmppc_44x_tlbe *stlbe = &vcpu_44x->shadow_tlb[i];
+
+ if (vcpu_44x->shadow_tlb_mod[i])
+ kvmppc_44x_tlbre(i, stlbe);
+
+ if (get_tlb_v(stlbe) && get_tlb_ts(stlbe))
+ kvmppc_44x_tlbie(i);
+ }
+}
+
+
/* Search the guest TLB for a matching entry. */
int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr, unsigned int pid,
unsigned int as)
@@ -283,6 +340,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr, u64 asid,
ref->tid = stlbe.tid;
/* Insert shadow mapping into hardware TLB. */
+ kvmppc_44x_tlbe_set_modified(vcpu_44x, victim);
kvmppc_44x_tlbwe(victim, &stlbe);
KVMTRACE_5D(STLB_WRITE, vcpu, victim, stlbe.tid, stlbe.word0, stlbe.word1,
stlbe.word2, handler);