diff options
| author | William Grant <wgrant@ubuntu.com> | 2014-08-24 15:13:48 +1000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-08-25 18:53:42 +0200 |
| commit | 1844e68ecabbdfdf0228774bcd5cf0f63ffc2e57 (patch) | |
| tree | f72eb352cf25eb7ff4bfe5312e28a547c98cb3e7 /target-i386 | |
| parent | 3431648272d317ed768fe46183c7a1cea4803732 (diff) | |
| download | qemu-1844e68ecabbdfdf0228774bcd5cf0f63ffc2e57.zip | |
target-i386: Don't forbid NX bit on PAE PDEs and PTEs
Commit e8f6d00c30ed88910d0d985f4b2bf41654172ceb ("target-i386: raise
page fault for reserved physical address bits") added a check that the
NX bit is not set on PAE PDPEs, but it also added it to rsvd_mask for
the rest of the function. This caused any PDEs or PTEs with NX set to be
erroneously rejected, making PAE guests with NX support unusable.
Signed-off-by: William Grant <wgrant@ubuntu.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/helper.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/target-i386/helper.c b/target-i386/helper.c index 47b982b437..30cb0d0143 100644 --- a/target-i386/helper.c +++ b/target-i386/helper.c @@ -615,8 +615,8 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr, if (!(pdpe & PG_PRESENT_MASK)) { goto do_fault; } - rsvd_mask |= PG_HI_USER_MASK | PG_NX_MASK; - if (pdpe & rsvd_mask) { + rsvd_mask |= PG_HI_USER_MASK; + if (pdpe & (rsvd_mask | PG_NX_MASK)) { goto do_fault_rsvd; } ptep = PG_NX_MASK | PG_USER_MASK | PG_RW_MASK; |