[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-stable] [PULL 06/14] target-i386: Don't forbid NX bit on PAE PDEs
From: |
Paolo Bonzini |
Subject: |
[Qemu-stable] [PULL 06/14] target-i386: Don't forbid NX bit on PAE PDEs and PTEs |
Date: |
Thu, 28 Aug 2014 16:09:05 +0200 |
From: William Grant <address@hidden>
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 <address@hidden>
Cc: address@hidden
Signed-off-by: Paolo Bonzini <address@hidden>
---
target-i386/helper.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 47b982b..30cb0d0 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;
--
1.8.3.1
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-stable] [PULL 06/14] target-i386: Don't forbid NX bit on PAE PDEs and PTEs,
Paolo Bonzini <=