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[Qemu-devel] [PATCH 09/11] PPC64: Fix NX bit
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 09/11] PPC64: Fix NX bit |
Date: |
Fri, 6 Mar 2009 16:36:03 +0100 |
This patch fixes two issues with the NX bit:
1) The guarded bit has nothing to do with NX.
2) ctx->nx only got ORed, but never reset. So when one page in the
lifetime of the VM was ever NX, all later pages were too.
Signed-off-by: Alexander Graf <address@hidden>
---
target-ppc/helper.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 7fe3f8f..58b7fe2 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -226,8 +226,7 @@ static always_inline int _pte_check (mmu_ctx_t *ctx, int
is_64b,
ptem = pte0 & PTE64_PTEM_MASK;
mmask = PTE64_CHECK_MASK;
pp = (pte1 & 0x00000003) | ((pte1 >> 61) & 0x00000004);
- ctx->nx |= (pte1 >> 2) & 1; /* No execute bit */
- ctx->nx |= (pte1 >> 3) & 1; /* Guarded bit */
+ ctx->nx = (pte1 >> 2) & 1; /* No execute bit */
} else
#endif
{
--
1.6.0.2
- [Qemu-devel] [PATCH 00/11] PPC64 Linux bringup patches v3, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 01/11] PPC64: Implement slbmte, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 02/11] PPC64: Implement large pages, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 03/11] PPC64: Implment tlbiel, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 04/11] Activate uninorth AGP bridge, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 05/11] PPC64: Nop some SPRs on 970fx, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 06/11] PPC64: Enable 64bit mode on interrupts, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 07/11] PPC64: Implement mtfsf.L encoding, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 08/11] PPC64: Fix RFI(d), Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 09/11] PPC64: Fix NX bit,
Alexander Graf <=
- [Qemu-devel] [PATCH 10/11] PPC64: Keep SLB in-CPU, Alexander Graf, 2009/03/06
- [Qemu-devel] [PATCH 11/11] PPC64: Disable BAT for 970, Alexander Graf, 2009/03/06
- Re: [Qemu-devel] [PATCH 10/11] PPC64: Keep SLB in-CPU, Hollis Blanchard, 2009/03/06
- Re: [Qemu-devel] [PATCH 09/11] PPC64: Fix NX bit, Hollis Blanchard, 2009/03/06
- Re: [Qemu-devel] [PATCH 09/11] PPC64: Fix NX bit, Alexander Graf, 2009/03/06
[Qemu-devel] Re: [PATCH 01/11] PPC64: Implement slbmte, Blue Swirl, 2009/03/07
[Qemu-devel] Re: [PATCH 00/11] PPC64 Linux bringup patches v3, Blue Swirl, 2009/03/07