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Sun, 04 May 2025 13:57:16 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: foss@percivaleng.com Subject: [PATCH 01/12] accel/tcg: Add TCGCPUOps.pointer_wrap Date: Sun, 4 May 2025 13:57:02 -0700 Message-ID: <20250504205714.3432096-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250504205714.3432096-1-richard.henderson@linaro.org> References: <20250504205714.3432096-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::631; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x631.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1746392320365116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- include/accel/tcg/cpu-ops.h | 7 +++++++ accel/tcg/cputlb.c | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/include/accel/tcg/cpu-ops.h b/include/accel/tcg/cpu-ops.h index cd22e5d5b9..83b2c2c864 100644 --- a/include/accel/tcg/cpu-ops.h +++ b/include/accel/tcg/cpu-ops.h @@ -222,6 +222,13 @@ struct TCGCPUOps { bool (*tlb_fill)(CPUState *cpu, vaddr address, int size, MMUAccessType access_type, int mmu_idx, bool probe, uintptr_t retaddr); + /** + * @pointer_wrap: + * + * We have incremented @base to @result, resulting in a page change. + * For the current cpu state, adjust @result for possible overflow. + */ + vaddr (*pointer_wrap)(CPUState *cpu, int mmu_idx, vaddr result, vaddr = base); /** * @do_transaction_failed: Callback for handling failed memory transac= tions * (ie bus faults or external aborts; not MMU faults) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 5f6d7c601c..c394293d33 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1773,6 +1773,12 @@ static bool mmu_lookup(CPUState *cpu, vaddr addr, Me= mOpIdx oi, l->page[1].size =3D l->page[0].size - size0; l->page[0].size =3D size0; =20 + if (cpu->cc->tcg_ops->pointer_wrap) { + l->page[1].addr =3D cpu->cc->tcg_ops->pointer_wrap(cpu, l->mmu= _idx, + l->page[1].ad= dr, + addr); + } + /* * Lookup both pages, recognizing exceptions from either. If the * second lookup potentially resized, refresh first CPUTLBEntryFul= l. --=20 2.43.0