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Wed, 10 Dec 2025 06:50:12 -0800 (PST) Received: from [127.0.1.1] ([2a10:d582:31e:0:62e8:705f:f7a:c7b0]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47a82d7f778sm56595235e9.11.2025.12.10.06.50.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Dec 2025 06:50:12 -0800 (PST) From: Jim MacArthur Subject: [PATCH v6 0/4] Basic ASID2 support Date: Wed, 10 Dec 2025 14:50:10 +0000 Message-Id: <20251210-jmac-asid2-v6-0-d3b3acab98c7@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAKKIOWkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyzHQUlJIzE vPSU3UzU4B8JSMDI1NDI0MD3azcxGTdxOLMFCPdRAujpERjU0MTc4sUJaCGgqLUtMwKsGHRsbW 1AA7tFXNcAAAA To: qemu-devel@nongnu.org Cc: Jim MacArthur , Richard Henderson , =?utf-8?q?Alex_Benn=C3=A9e?= , Gustavo Romero X-Mailer: b4 0.13.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32f; envelope-from=jim.macarthur@linaro.org; helo=mail-wm1-x32f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Enable the ID_AA64MMFR4_EL1 register, add the ASID2 field for cpu_max, then enable writes to FNG1, FNG0, and A2 bits of TCR2_EL1. Any change of ASID still causes a TLB flush. Changes since V5: - Patch 2: - More specific TLB flush. Now only flushes the TLBs relevant to the written register, and then only if A2 changes. Thanks to Richard Henderson for advice on TLB flushing. Signed-off-by: Jim MacArthur --- Jim MacArthur (4): target/arm: Enable ID_AA64MMFR4_EL1 register target/arm: Allow writes to FNG1, FNG0, A2 target/arm/tcg/cpu64.c: Enable ASID2 for cpu_max tests: Add test for ASID2 and write/read of feature bits docs/system/arm/emulation.rst | 1 + target/arm/cpu-features.h | 7 ++++ target/arm/cpu-sysregs.h.inc | 1 + target/arm/helper.c | 32 ++++++++++++----- target/arm/internals.h | 5 +++ target/arm/tcg/cpu64.c | 4 +++ tests/tcg/aarch64/system/asid2.c | 76 ++++++++++++++++++++++++++++++++++++++++ 7 files changed, 118 insertions(+), 8 deletions(-) --- base-commit: 9c23f2a7b0b45277693a14074b1aaa827eecdb92 change-id: 20251210-jmac-asid2-a82ba351478d Best regards, -- Jim MacArthur