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Wed, 28 Dec 2022 04:49:20 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Ilya Leoshkevich , Richard Henderson , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH 1a/4] accel/tcg: Fix tb_invalidate_phys_page_unwind Date: Wed, 28 Dec 2022 13:49:17 +0100 Message-Id: <20221228124918.80011-1-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221224151821.464455-2-richard.henderson@linaro.org> References: <20221224151821.464455-2-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=philmd@linaro.org; helo=mail-wm1-x329.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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org When called from syscall(), we are not within a TB and pc == 0. We can skip the check for invalidating the current TB. Signed-off-by: Richard Henderson [PMD: Split patch in 2] Signed-off-by: Philippe Mathieu-Daudé --- accel/tcg/tb-maint.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/accel/tcg/tb-maint.c b/accel/tcg/tb-maint.c index 1b8e860647..c9b8d3c6c3 100644 --- a/accel/tcg/tb-maint.c +++ b/accel/tcg/tb-maint.c @@ -1024,8 +1024,18 @@ void tb_invalidate_phys_page(tb_page_addr_t addr) */ bool tb_invalidate_phys_page_unwind(tb_page_addr_t addr, uintptr_t pc) { - assert(pc != 0); -#ifdef TARGET_HAS_PRECISE_SMC + /* + * Without precise smc semantics, or when outside of a TB, + * we can skip to invalidate. + */ +#ifndef TARGET_HAS_PRECISE_SMC + pc = 0; +#endif + if (!pc) { + tb_invalidate_phys_page(addr); + return false; + } + assert_memory_lock(); { TranslationBlock *current_tb = tcg_tb_lookup(pc); @@ -1058,9 +1068,6 @@ bool tb_invalidate_phys_page_unwind(tb_page_addr_t addr, uintptr_t pc) return true; } } -#else - tb_invalidate_phys_page(addr); -#endif /* TARGET_HAS_PRECISE_SMC */ return false; } #else