diff options
author | Hollis Blanchard <hollisb@us.ibm.com> | 2008-07-25 14:54:52 -0400 |
---|---|---|
committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 04:15:16 -0400 |
commit | 83aae4a8098eb8a40a2e9dab3714354182143b4f (patch) | |
tree | 872381c8aa610e3c1053008e967728f121fa55cb /arch/powerpc/include/asm/kvm_host.h | |
parent | 20754c2495a791b5b429c0da63394c86ade978e7 (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/asm/kvm_host.h')
-rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index dc3a7562bae4..4338b03da8f9 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 { | |||
82 | /* Pages which are referenced in the shadow TLB. */ | 82 | /* Pages which are referenced in the shadow TLB. */ |
83 | struct page *shadow_pages[PPC44x_TLB_SIZE]; | 83 | struct page *shadow_pages[PPC44x_TLB_SIZE]; |
84 | 84 | ||
85 | /* Track which TLB entries we've modified in the current exit. */ | ||
86 | u8 shadow_tlb_mod[PPC44x_TLB_SIZE]; | ||
87 | |||
85 | u32 host_stack; | 88 | u32 host_stack; |
86 | u32 host_pid; | 89 | u32 host_pid; |
87 | u32 host_dbcr0; | 90 | u32 host_dbcr0; |