Implement PWALK_SET_DIRTY in the page walker. This flag allows controlling, whether the page walker will set the dirty bit after a successful page walk. If the page walk fails for any reason, the dirty flag is not set.
Signed-off-by: Nikolas Wipper nikwip@amazon.de --- arch/x86/kvm/mmu/paging_tmpl.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index eed6e2c653ba..b6897f7fbf52 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -318,6 +318,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker, const int user_fault = access & PFERR_USER_MASK; const int fetch_fault = access & PFERR_FETCH_MASK; const int set_accessed = flags & PWALK_SET_ACCESSED; + const int set_dirty = flags & PWALK_SET_DIRTY; u16 errcode = 0; gpa_t real_gpa; gfn_t gfn; @@ -471,7 +472,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
if (unlikely(set_accessed && !accessed_dirty)) { ret = FNAME(update_accessed_dirty_bits)(vcpu, mmu, walker, addr, - write_fault); + write_fault && set_dirty); if (unlikely(ret < 0)) goto error; else if (ret)