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Message-Id: <1292967460-15709-5-git-send-email-konrad.wilk@oracle.com> Date: Tue, 21 Dec 2010 16:37:34 -0500 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: linux-kernel@...r.kernel.org, jeremy@...p.org, hpa@...or.com Cc: Jan Beulich <JBeulich@...ell.com>, xen-devel@...ts.xensource.com, Konrad Rzeszutek Wilk <konrad@...nel.org>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> Subject: [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@...cle.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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