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h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=sdCtAt9wA/e4f07TlKewZZi1SYQl+7RGIW+cUQej1hrqiTwRFv/+KEa2N7OhIVs9r 200DDhzUuxLdRajcS7CmlxRs9YrUA0c49KuK0/gGxlFI4g0wBxvWpjGnDVqOaLtPl+ ikhkJbfNtCUVzvde/VNPBebq2vudbIY+rPF3I0uakspi3UYnr75MQ9t3d5KCjzekdx 0p92PTpVq4XxMBRDJ094NkQzeFuifuI0+Qe/TzfuP+zMRMon0R7VzyObGxAAOZQQKR XnrBclqp6IdKXVxbf4b0ompn4FweBPjI7PhBRWQ86OFPGO9RRLbWAvT8nNxGooMtoQ 3znf0xl+NF3/Q== Received: from disco-boy.misterjones.org ([217.182.43.188] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1qBi4E-006tCY-GZ; Tue, 20 Jun 2023 21:35:10 +0100 MIME-Version: 1.0 Date: Tue, 20 Jun 2023 21:35:10 +0100 From: Marc Zyngier To: neil.armstrong@linaro.org Cc: Joey Gouly , linux-arm-kernel@lists.infradead.org, Bjorn Andersson , nd@arm.com, broonie@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, mark.rutland@arm.com, oliver.upton@linux.dev, shuah@kernel.org, suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com, linux-arm-msm Subject: Re: [PATCH v4 16/20] arm64: enable Permission Indirection Extension (PIE) In-Reply-To: References: <20230606145859.697944-1-joey.gouly@arm.com> <20230606145859.697944-17-joey.gouly@arm.com> User-Agent: Roundcube Webmail/1.4.13 Message-ID: <1c70fa1065b313d314707f22386972e3@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 217.182.43.188 X-SA-Exim-Rcpt-To: neil.armstrong@linaro.org, joey.gouly@arm.com, linux-arm-kernel@lists.infradead.org, andersson@kernel.org, nd@arm.com, broonie@kernel.org, catalin.marinas@arm.com, james.morse@arm.com, mark.rutland@arm.com, oliver.upton@linux.dev, shuah@kernel.org, suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com, linux-arm-msm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230620_133515_106413_F0AE6A71 X-CRM114-Status: GOOD ( 12.55 ) 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 On 2023-06-20 20:16, Neil Armstrong wrote: > Hi Joey, > > On 06/06/2023 16:58, Joey Gouly wrote: >> Now that the necessary changes have been made, set the Permission >> Indirection >> registers and enable the Permission Indirection Extension. >> >> Signed-off-by: Joey Gouly >> Cc: Catalin Marinas >> Cc: Will Deacon >> Reviewed-by: Catalin Marinas > > This patch on linux-next causes a great amount of: > > X xxx.xxxxxx Emulated RAZ for ID register: ISS 0x36002f > > messages printed by the system firmware on the Qualcomm SM8550 SoC, > and the platform is barely usable. As others have said on this thread, this is a firmware bug. Not a lot we can do about that, unfortunately, apart from hiding the new feature behind a config option that you'd disable on this platform. Alternatively, disabling idle management on this machine should reduce the screaming greatly. M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel