The kvm mmu attempts to cache global translations, however it misses on
global huge page translation (which is what most global pages are).
By caching global huge page translations, boot time of fc5 i386 on i386
is reduced from ~35 seconds to ~24 seconds.
Signed-off-by: Avi Kivity <[email protected]>
Index: linux-2.6/drivers/kvm/paging_tmpl.h
===================================================================
--- linux-2.6.orig/drivers/kvm/paging_tmpl.h
+++ linux-2.6/drivers/kvm/paging_tmpl.h
@@ -105,7 +105,7 @@ static void FNAME(set_pde)(struct kvm_vc
if (PTTYPE == 32 && is_cpuid_PSE36())
gaddr |= (guest_pde & PT32_DIR_PSE36_MASK) <<
(32 - PT32_DIR_PSE36_SHIFT);
- *shadow_pte = (guest_pde & PT_NON_PTE_COPY_MASK) |
+ *shadow_pte = (guest_pde & (PT_NON_PTE_COPY_MASK | PT_GLOBAL_MASK)) |
((guest_pde & PT_DIR_PAT_MASK) >>
(PT_DIR_PAT_SHIFT - PT_PAT_SHIFT));
set_pte_common(vcpu, shadow_pte, gaddr,
-
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