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[2003:c9:3f4c:c600:a5cd:f10d:e606:b5e2]) by smtp.gmail.com with ESMTPSA id a7-20020a05620a124700b0078d667d1085sm1128144qkl.84.2024.05.03.04.01.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 May 2024 04:01:32 -0700 (PDT) Date: Fri, 3 May 2024 13:01:27 +0200 (CEST) From: Sebastian Ott To: Oliver Upton cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Marc Zyngier , James Morse , Suzuki K Poulose , Catalin Marinas , Will Deacon Subject: Re: [PATCH v2 0/6] KVM: arm64: emulation for CTR_EL0 In-Reply-To: Message-ID: References: <20240426104950.7382-1-sebott@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240503_040139_565188_7DBC6F41 X-CRM114-Status: GOOD ( 13.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Oliver, On Wed, 1 May 2024, Oliver Upton wrote: > On Fri, Apr 26, 2024 at 12:49:44PM +0200, Sebastian Ott wrote: >> Hej folks, >> >> I'm looking into supporting migration between 2 Ampere Altra (Max) >> machines (using Neoverse-N1). They are almost identical regarding >> their feature id register state except for CTR_EL0.DIC which is set >> on one machine but not the other. >> >> CTR_EL0 is currently marked as invariant and migrating a VM between >> those 2 machines using qemu fails. > > I left some feedback on the series, but in addition to that would it be > possible to augment the set_id_regs selftest to exercise the CTR_EL0 > mutability? Yes, sure! Thanks, Sebastian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel