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xen: mask out PWT too

The hypervisor doesn't allow PCD or PWT to be set on guest ptes, so
make sure they're masked out.  Also, fix up some previous mispatching.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Jeremy Fitzhardinge 17 年之前
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共有 1 个文件被更改,包括 1 次插入1 次删除
  1. 1 1
      arch/x86/xen/mmu.c

+ 1 - 1
arch/x86/xen/mmu.c

@@ -291,7 +291,7 @@ pte_t xen_make_pte(unsigned long pte)
 	if (pte & _PAGE_PRESENT)
 		pte = phys_to_machine(XPADDR(pte)).maddr;
 
-	pte &= ~_PAGE_PCD;
+	pte &= ~(_PAGE_PCD | _PAGE_PWT);
 
 	return (pte_t){ pte };
 }