Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
linux
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>
authored by Ahmed S. Darwish and committed by Thomas Gleixner 31f4b46e 261f0ce5
+2
-2
drivers/lguest/page_tables.c
+2
-2
drivers/lguest/page_tables.c
···
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static void check_gpte(struct lg_cpu *cpu, pte_t gpte)
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{
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-
if ((pte_flags(gpte) & (_PAGE_PWT|_PAGE_PSE))
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|| pte_pfn(gpte) >= cpu->lg->pfn_limit)
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if ((pte_flags(gpte) & _PAGE_PSE) ||
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pte_pfn(gpte) >= cpu->lg->pfn_limit)
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kill_guest(cpu, "bad page table entry");
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}
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