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Tue, 05 May 2020 08:59:20 -0700 (PDT) Date: Tue, 5 May 2020 16:59:16 +0100 From: Andrew Scull To: Marc Zyngier Subject: Re: [PATCH 05/26] arm64: Document SW reserved PTE/PMD bits in Stage-2 descriptors Message-ID: <20200505155916.GB237572@google.com> References: <20200422120050.3693593-1-maz@kernel.org> <20200422120050.3693593-6-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200422120050.3693593-6-maz@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200505_085923_049940_89A95A4A X-CRM114-Status: GOOD ( 14.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, Andre Przywara , kvmarm@lists.cs.columbia.edu, George Cherian , "Zengtao \(B\)" , Catalin Marinas , Will Deacon , Dave Martin , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Apr 22, 2020 at 01:00:29PM +0100, Marc Zyngier wrote: > Advertise bits [58:55] as reserved for SW in the S2 descriptors. > > Signed-off-by: Marc Zyngier > --- > arch/arm64/include/asm/pgtable-hwdef.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h > index 6bf5e650da788..7eab0d23cdb52 100644 > --- a/arch/arm64/include/asm/pgtable-hwdef.h > +++ b/arch/arm64/include/asm/pgtable-hwdef.h > @@ -177,10 +177,12 @@ > #define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */ > #define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */ > #define PTE_S2_XN (_AT(pteval_t, 2) << 53) /* XN[1:0] */ > +#define PTE_S2_SW_RESVD (_AT(pteval_t, 15) << 55) /* Reserved for SW */ > > #define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */ > #define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */ > #define PMD_S2_XN (_AT(pmdval_t, 2) << 53) /* XN[1:0] */ > +#define PMD_S2_SW_RESVD (_AT(pmdval_t, 15) << 55) /* Reserved for SW */ > > #define PUD_S2_RDONLY (_AT(pudval_t, 1) << 6) /* HAP[2:1] */ > #define PUD_S2_RDWR (_AT(pudval_t, 3) << 6) /* HAP[2:1] */ > -- > 2.26.1 > > _______________________________________________ > kvmarm mailing list > kvmarm@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm This is consistent with "Attribute fields in stage 1 VMSAv8-64 Block and Page descriptors" Reviewed-by: Andrew Scull _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel