From b64b3763a5b3868e85330c891e1a30189dcde9b1 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 31 May 2007 18:24:09 +0300 Subject: KVM: MMU: Don't cache guest access bits in the shadow page table This was once used to avoid accessing the guest pte when upgrading the shadow pte from read-only to read-write. But usually we need to set the guest pte dirty or accessed bits anyway, so this wasn't really exploited. Signed-off-by: Avi Kivity --- drivers/kvm/mmu.c | 8 -------- 1 file changed, 8 deletions(-) (limited to 'drivers/kvm/mmu.c') diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index b47391f..986d012 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -97,14 +97,6 @@ static int dbg = 1; #define PT_SHADOW_PS_MARK (1ULL << PT_FIRST_AVAIL_BITS_SHIFT) #define PT_SHADOW_IO_MARK (1ULL << PT_FIRST_AVAIL_BITS_SHIFT) -#define PT_SHADOW_WRITABLE_SHIFT (PT_FIRST_AVAIL_BITS_SHIFT + 1) -#define PT_SHADOW_WRITABLE_MASK (1ULL << PT_SHADOW_WRITABLE_SHIFT) - -#define PT_SHADOW_USER_SHIFT (PT_SHADOW_WRITABLE_SHIFT + 1) -#define PT_SHADOW_USER_MASK (1ULL << (PT_SHADOW_USER_SHIFT)) - -#define PT_SHADOW_BITS_OFFSET (PT_SHADOW_WRITABLE_SHIFT - PT_WRITABLE_SHIFT) - #define VALID_PAGE(x) ((x) != INVALID_PAGE) #define PT64_LEVEL_BITS 9 -- cgit v1.1