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authorAhmed S. Darwish <darwish.07@gmail.com>2008-02-09 23:24:09 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-02-09 23:24:09 +0100
commit31f4b46ec6f889533c06537dea96bb0d20fa625b (patch)
tree2d0f8e0fd534d5c6968fb722075f0f3733ff0ca3
parent261f0ce5ccdd17dc240d8453ca5ffc4688b92700 (diff)
downloadop-kernel-dev-31f4b46ec6f889533c06537dea96bb0d20fa625b.zip
op-kernel-dev-31f4b46ec6f889533c06537dea96bb0d20fa625b.tar.gz
lguest: accept guest _PAGE_PWT page table entries
Beginning from commit 4138cc3418f5, ioremap_nocache() sets the _PAGE_PWT flag. Lguest doesn't accept a guest pte with a _PWT flag and reports a "bad page table entry" in that case. Accept guest _PAGE_PWT page table entries. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/lguest/page_tables.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index 74b4cf2..275f23c 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -178,8 +178,8 @@ static void release_pte(pte_t pte)
static void check_gpte(struct lg_cpu *cpu, pte_t gpte)
{
- if ((pte_flags(gpte) & (_PAGE_PWT|_PAGE_PSE))
- || pte_pfn(gpte) >= cpu->lg->pfn_limit)
+ if ((pte_flags(gpte) & _PAGE_PSE) ||
+ pte_pfn(gpte) >= cpu->lg->pfn_limit)
kill_guest(cpu, "bad page table entry");
}
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