diff options
| author | Ben Hutchings <ben@decadent.org.uk> | 2019-10-19 20:10:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-16 12:29:52 +0300 |
| commit | 9dc6bc3f22f08099a27c38c68983fbc419e879f3 (patch) | |
| tree | cbc8ae471b05401b14d4a5ab3b14ddf4447ecf89 /arch/x86/kvm/mmu.c | |
| parent | 515fa37a3e550ac7f291fb295b4e6174b6bbbd85 (diff) | |
| download | linux-9dc6bc3f22f08099a27c38c68983fbc419e879f3.tar.xz | |
KVM: x86: Add is_executable_pte()
Extracted from commit d3e328f2cb01 "kvm: x86: mmu: Verify that
restored PTE has needed perms in fast page fault".
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index a1edd19a1665..96a0601a47c4 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -338,6 +338,11 @@ static int is_last_spte(u64 pte, int level) return 0; } +static bool is_executable_pte(u64 spte) +{ + return (spte & (shadow_x_mask | shadow_nx_mask)) == shadow_x_mask; +} + static kvm_pfn_t spte_to_pfn(u64 pte) { return (pte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT; |