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authorHollis Blanchard <hollisb@us.ibm.com>2008-07-25 13:54:52 -0500
committerAvi Kivity <avi@qumranet.com>2008-10-15 10:15:16 +0200
commit83aae4a8098eb8a40a2e9dab3714354182143b4f (patch)
tree872381c8aa610e3c1053008e967728f121fa55cb /arch/powerpc/include
parent20754c2495a791b5b429c0da63394c86ade978e7 (diff)
KVM: ppc: Write only modified shadow entries into the TLB on exit
Track which TLB entries need to be written, instead of overwriting everything below the high water mark. Typically only a single guest TLB entry will be modified in a single exit. Guest boot time performance improvement: about 15%. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/kvm_host.h3
-rw-r--r--arch/powerpc/include/asm/kvm_ppc.h3
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index dc3a7562bae..4338b03da8f 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -82,6 +82,9 @@ struct kvm_vcpu_arch {
/* Pages which are referenced in the shadow TLB. */
struct page *shadow_pages[PPC44x_TLB_SIZE];
+ /* Track which TLB entries we've modified in the current exit. */
+ u8 shadow_tlb_mod[PPC44x_TLB_SIZE];
+
u32 host_stack;
u32 host_pid;
u32 host_dbcr0;
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index a8b06879226..8e7e4295990 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -65,6 +65,9 @@ extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, gva_t eaddr,
gva_t eend, u32 asid);
extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
+/* XXX Book E specific */
+extern void kvmppc_tlbe_set_modified(struct kvm_vcpu *vcpu, unsigned int i);
+
extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);
static inline void kvmppc_queue_exception(struct kvm_vcpu *vcpu, int exception)