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Message-ID: <20150724162654.GB21177@arm.com> Date: Fri, 24 Jul 2015 17:26:54 +0100 From: Will Deacon <will.deacon@....com> To: Catalin Marinas <Catalin.Marinas@....com> Cc: "Jonathan (Zhixiong) Zhang" <zjzhang@...eaurora.org>, "fu.wei@...aro.org" <fu.wei@...aro.org>, "al.stone@...aro.org" <al.stone@...aro.org>, "bp @ alien8 . de Matt Fleming" <matt.fleming@...el.com>, "rjw@...ysocki.net" <rjw@...ysocki.net>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org> Subject: Re: [PATCH V7 3/5] arm64: mm: add PROT_DEVICE_nGnRnE and PROT_NORMAL_WT On Fri, Jul 24, 2015 at 05:15:00PM +0100, Catalin Marinas wrote: > On Tue, Jul 21, 2015 at 10:59:18PM +0100, Jonathan (Zhixiong) Zhang wrote: > > * > > * n = AttrIndx[2:0] > > * n MAIR > > @@ -303,12 +303,14 @@ ENTRY(__cpu_setup) > > * DEVICE_GRE 010 00001100 > > * NORMAL_NC 011 01000100 > > * NORMAL 100 11111111 > > + * NORMAL_WT 101 10111011 > > I don't think the write allocation hint makes much sense for WT memory > (though it shouldn't cause issues either). Just use 10101010. The EFI spec actually specifies the 1011 1011 encoding, so I think we should follow that. Will -- 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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