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Date: Mon, 16 Nov 2015 14:50:48 -0800 From: Laura Abbott <labbott@...hat.com> To: Ard Biesheuvel <ard.biesheuvel@...aro.org>, Laura Abbott <labbott@...oraproject.org> Cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCHv2] arm64: Fix R/O permissions in mark_rodata_ro On 11/14/2015 11:38 PM, Ard Biesheuvel wrote: > On 12 November 2015 at 21:21, Laura Abbott <labbott@...oraproject.org> wrote: >> The permissions in mark_rodata_ro trigger a build error >> with STRICT_MM_TYPECHECKS. Fix this by introducing >> PAGE_KERNEL_ROX for the same reasons as PAGE_KERNEL_RO. > > Forgive the bikeshedding but perhaps PAGE_KERNEL_EXEC_RO is more consistent? > powerpc was using PAGE_KERNEL_ROX so I went with that. Blame powerpc ;) >> From Ard: >> >> "PAGE_KERNEL_EXEC has PTE_WRITE set as well, making the range >> writeable under the ARMv8.1 DBM feature, that manages the >> dirty bit in hardware (writing to a page with the PTE_RDONLY >> and PTE_WRITE bits both set will clear the PTE_RDONLY bit in that case)" >> >> Signed-off-by: Laura Abbott <labbott@...oraproject.org> > > Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org> > Thanks, Laura -- 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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