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X-Spam-Score: -0.2 (/) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: These patches fix the system hang issue caused by using perf tool on T-HEAD c9xx related platforms. These patch solves two issues for T-HEAD c9xx pmu: When detecting features of PMU, MHPMCOUNTER3 is written to all 1s. This will cause an unexpected overflow interrupt before starting the PMU in T-HEAD [...] Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [inochiama[at]outlook.com] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: opensbi@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "opensbi" Errors-To: opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org These patches fix the system hang issue caused by using perf tool on T-HEAD c9xx related platforms. These patch solves two issues for T-HEAD c9xx pmu: When detecting features of PMU, MHPMCOUNTER3 is written to all 1s. This will cause an unexpected overflow interrupt before starting the PMU in T-HEAD cores. Another thing is the T-HEAD c9xx pmu is not a standart pmu, especially in interrupt process and access delegation. For interrupt process, the T-HEAD pmu uses MCOUNTERINTEN and MCOUNTEROF to control and identify the interrupt. For access delegation. It needs to set MCOUNTERWEN to allow S-mode to access related CSRs. Changed from V1: 1. fix the hang issue when using perf with high profile frequency. 2. optimze the performance of irq process of T-HEAD c9xx pmu. Inochi Amaoto (3): lib: sbi_pmu: ensure update hpm counter before starting counting platform: generic: allwinner: fix OF process for T-HEAD c9xx pmu lib: sbi_pmu: keep overflow interrupt of stopped hpm counter disabled lib/sbi/sbi_pmu.c | 17 +++++++++++------ platform/generic/allwinner/sun20i-d1.c | 25 +++++++++++++++---------- 2 files changed, 26 insertions(+), 16 deletions(-) Tested-by: Samuel Holland --- 2.41.0