[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 04/10] xen/mmu: For 1-1 mapping, automatically set _PAGE_IOMAP.
This means that for PFNs (specifically: those in any E820 gaps or non-RAM E820 regions) that have 1-1 mapping we set the _PAGE_IOMAP flag. Later on we could remove the _PAGE_IOMAP code handling, but for right now lets keep this in to not introduce any bisection failures across this patchset. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> --- arch/x86/xen/mmu.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 4ba7e4e..bd02e7d 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -832,6 +832,9 @@ static pteval_t pte_pfn_to_mfn(pteval_t val) pteval_t flags = val & PTE_FLAGS_MASK; unsigned long mfn = pfn_to_mfn(pfn); + if (mfn == pfn) + flags |= _PAGE_IOMAP; + /* * If there's no mfn for the pfn, then just create an * empty non-present pte. Unfortunately this loses -- 1.7.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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