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Tue, 14 Oct 2025 13:07:35 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v2 23/37] target/arm: Split out flush_if_asid_change Date: Tue, 14 Oct 2025 13:07:04 -0700 Message-ID: <20251014200718.422022-24-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251014200718.422022-1-richard.henderson@linaro.org> References: <20251014200718.422022-1-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::42d; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42d.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=unavailable 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: 1760472700885158501 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- target/arm/helper.c | 33 +++++++++++++++++++-------------- 1 file changed, 19 insertions(+), 14 deletions(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index 550ba77c5c..c6d290ce7c 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -2929,6 +2929,17 @@ static void vmsa_tcr_el12_write(CPUARMState *env, co= nst ARMCPRegInfo *ri, raw_write(env, ri, value); } =20 +static void flush_if_asid_change(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t new, unsigned mask) +{ + uint64_t old =3D raw_read(env, ri); + + /* The ASID or VMID is in bits [63:48]. */ + if ((old ^ new) >> 48) { + tlb_flush_by_mmuidx(env_cpu(env), mask); + } +} + static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { @@ -2950,14 +2961,13 @@ static void vmsa_tcr_ttbr_el2_write(CPUARMState *en= v, const ARMCPRegInfo *ri, * TCR_EL2.A1 to know if this is really the TTBRx_EL2 that * holds the active ASID, only checking the field that might. */ - if (extract64(raw_read(env, ri) ^ value, 48, 16) && - (arm_hcr_el2_eff(env) & HCR_E2H)) { - uint16_t mask =3D ARMMMUIdxBit_E20_2 | - ARMMMUIdxBit_E20_2_PAN | - ARMMMUIdxBit_E20_2_GCS | - ARMMMUIdxBit_E20_0 | - ARMMMUIdxBit_E20_0_GCS; - tlb_flush_by_mmuidx(env_cpu(env), mask); + if (arm_hcr_el2_eff(env) & HCR_E2H) { + flush_if_asid_change(env, ri, value, + ARMMMUIdxBit_E20_2 | + ARMMMUIdxBit_E20_2_PAN | + ARMMMUIdxBit_E20_2_GCS | + ARMMMUIdxBit_E20_0 | + ARMMMUIdxBit_E20_0_GCS); } raw_write(env, ri, value); } @@ -2965,16 +2975,11 @@ static void vmsa_tcr_ttbr_el2_write(CPUARMState *en= v, const ARMCPRegInfo *ri, static void vttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { - ARMCPU *cpu =3D env_archcpu(env); - CPUState *cs =3D CPU(cpu); - /* * A change in VMID to the stage2 page table (Stage2) invalidates * the stage2 and combined stage 1&2 tlbs (EL10_1 and EL10_0). */ - if (extract64(raw_read(env, ri) ^ value, 48, 16) !=3D 0) { - tlb_flush_by_mmuidx(cs, alle1_tlbmask(env)); - } + flush_if_asid_change(env, ri, value, alle1_tlbmask(env)); raw_write(env, ri, value); } =20 --=20 2.43.0