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[35.233.69.230]) by smtp.gmail.com with ESMTPSA id j203sm1510033wmj.40.2021.03.12.01.15.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Mar 2021 01:15:33 -0800 (PST) Date: Fri, 12 Mar 2021 09:15:30 +0000 From: Quentin Perret To: Will Deacon Subject: Re: [PATCH v4 27/34] KVM: arm64: Always zero invalid PTEs Message-ID: References: <20210310175751.3320106-1-qperret@google.com> <20210310175751.3320106-28-qperret@google.com> <20210311173338.GB31378@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210311173338.GB31378@willie-the-truck> Cc: android-kvm@google.com, catalin.marinas@arm.com, mate.toth-pal@arm.com, seanjc@google.com, tabba@google.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, maz@kernel.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Thursday 11 Mar 2021 at 17:33:38 (+0000), Will Deacon wrote: > On Wed, Mar 10, 2021 at 05:57:44PM +0000, Quentin Perret wrote: > > kvm_set_invalid_pte() currently only clears bit 0 from a PTE because > > stage2_map_walk_table_post() needs to be able to follow the anchor. In > > preparation for re-using bits 63-02 from invalid PTEs, make sure to zero > > Why do you exclude bit 1 from this range? Hmm, no good reason really. I wanted to play games with invalid table mappings at some point, but dropped the idea and forgot to update the commit message. My bad, I'll fix it up. Thanks, Quentin _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm