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[81.2.115.145]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b919cf2b2sm15484227f8f.18.2026.03.27.04.17.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Mar 2026 04:17:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1774610269; x=1775215069; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UaZgT662lqVLo8fysFL+JEr5ubuoSNMh8uSkamaRExg=; b=k0qFlTXq0JI0W3DtmsX2HkmtGlqEk5nC9F5KlKj48lToq27+bAqz0nixOW14YbcC43 UUJ9/0ZiZ7nSqd6NHNDplRE/6n4zU9w+4L9THHqTziSkZWGn/8veQgT70AezSqH9UBQt 18HH8vCgCNDbqAne2cBEl8nkQWs/L0MPpR1c4iddU7Y2eX0ku4waLTbutpHR3iKZDHiy rZEMQfnoCxbmSLeldb84fj2DoGUjCcEOLufUVkapVEAmxCAfEUnBTWLoCbMDcda4lgxX hMI7uFj7gl4aKFsVInIyPuBpzBJAQPjknOvatb8u3cDWc4n5Cdq5F4xGK6Gy6l9DDFws GgVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774610269; x=1775215069; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=UaZgT662lqVLo8fysFL+JEr5ubuoSNMh8uSkamaRExg=; b=PHYxbH0XDAthGKLiqFxEw48BXzyrKwqDQFF2cbe+iiW0ASHdI0nW4v7UyvU7VqusmC FB5j51C/ugN2tTBgSm0ayILee9us5BmmyPNmrjSkF84t6t8dAIzW2yeRbbhjN4eJ6cbd n3lVvefEulOXZcHN7bNbYDCr7QgswJEIpp1ndmjyeDZMO/SZdOLr/NdUqslIaA8G5Knv TNEgiVuzd2QjwIg2c3jjmPggYdJaV8NTCnwZfUDgiIG1lcMyp0QzLst8dDWhgDuW9Txa uXQjPJZKLzWzukc/ttPi5JjVsRYLgyLAD3wXK2mBhsmmMEStsIIkYEtBaAr4CCUrx4mY TJiw== X-Forwarded-Encrypted: i=1; AJvYcCXdSwC4LcIS3Ks3WoRlqYbDjUAUCx5NXBcLHPszPPHdHQIVW7kvdgSCRUF6s0OSLuDbpcvh1snOKqA5@nongnu.org X-Gm-Message-State: AOJu0YzDG523NoTyFiDIMqnvdgXBAyC41nhoX8upin/9faRI6+mBSWXI XaYn3yz1/cdVag59Uax6DrqWUxSj/eRfE7Fl108F5BGbuKACgaJH2zr9uINaelrDzxg= X-Gm-Gg: ATEYQzzaw7rfap3xq2vi6FEUbFDPsBrP1DwEvpwUJW+YesQZgBUr447zW7IksW9GfJO RwpzW/oKG8Togmc4DsyxLw7DD2PqQlPQxD+KQQojCWPIVp62gSwZ3dUtsho2KDrG9bYDDqJ+ODu 0CUIZTJki4LL7kpwyqCsYLaNmg6i6Zb0XC402UCpJktmRdRAFogMDjdA0n4Zh6W0CDqMXfjpJEt c+UNidWRQgnhRKS09kiNDIFp78GJ9FxE+9fzYNwhAOXdbSBpGxHFRnmwDZ3NrL5t/Fh7GJ3tLGV NmLB9L2Hg9lDmwsZo9w1zyPsZBI9gjWdL3ELC5w7l/aY0m144RPTmd8/CWo9fXAcGRz6oC/G0jo j4/S7lYKz4MDBR31FmML8mv3cRgpqgFpHmXnCZs29da/MBRYNMJKQ0vg+juCX7q7rlVKLVCA7fc N2HgxBHPzd8twH6wwY5IGxpmK80gk5Id+/pY8llR5gxTi0cp347BKFnJve2wkbGpH7S40hN0KeB K3n+nM+CPDXoph2aFN4sz4VnCfN6zQ= X-Received: by 2002:a5d:5f96:0:b0:43b:93af:43d8 with SMTP id ffacd0b85a97d-43b9e76bb16mr3163975f8f.0.1774610268593; Fri, 27 Mar 2026 04:17:48 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: Jonathan Cameron Subject: [PATCH v2 49/65] target/arm: GICv5 cpuif: Implement GIC CDEOI Date: Fri, 27 Mar 2026 11:16:44 +0000 Message-ID: <20260327111700.795099-50-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260327111700.795099-1-peter.maydell@linaro.org> References: <20260327111700.795099-1-peter.maydell@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=2a00:1450:4864:20::42a; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42a.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: qemu development 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: 1774610810741154100 Content-Type: text/plain; charset="utf-8" Implement the GIC CDEOI instruction, which performs a "priority drop", clearing the highest set bit in the APR register. Signed-off-by: Peter Maydell Reviewed-by: Jonathan Cameron --- target/arm/tcg/gicv5-cpuif.c | 21 +++++++++++++++++++++ target/arm/tcg/trace-events | 1 + 2 files changed, 22 insertions(+) diff --git a/target/arm/tcg/gicv5-cpuif.c b/target/arm/tcg/gicv5-cpuif.c index 09870e0b09..0974637c92 100644 --- a/target/arm/tcg/gicv5-cpuif.c +++ b/target/arm/tcg/gicv5-cpuif.c @@ -554,6 +554,22 @@ static uint64_t gicr_cdia_read(CPUARMState *env, const= ARMCPRegInfo *ri) return hppi.intid | R_GICR_CDIA_VALID_MASK; } =20 +static void gic_cdeoi_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* + * Perform Priority Drop in the current interrupt domain. + * This is just clearing the lowest set bit in the APR. + */ + GICv5Domain domain =3D gicv5_current_phys_domain(env); + uint64_t *apr =3D &env->gicv5_cpuif.icc_apr[domain]; + + trace_gicv5_cdeoi(domain); + + /* clear lowest bit, doing nothing if already zero */ + *apr &=3D *apr - 1; +} + static const ARMCPRegInfo gicv5_cpuif_reginfo[] =3D { /* * Barrier: wait until the effects of a cpuif system register @@ -606,6 +622,11 @@ static const ARMCPRegInfo gicv5_cpuif_reginfo[] =3D { .access =3D PL1_W, .type =3D ARM_CP_IO | ARM_CP_NO_RAW, .writefn =3D gic_cdrcfg_write, }, + { .name =3D "GIC_CDEOI", .state =3D ARM_CP_STATE_AA64, + .opc0 =3D 1, .opc1 =3D 0, .crn =3D 12, .crm =3D 1, .opc2 =3D 7, + .access =3D PL1_W, .type =3D ARM_CP_IO | ARM_CP_NO_RAW, + .writefn =3D gic_cdeoi_write, + }, { .name =3D "GIC_CDHM", .state =3D ARM_CP_STATE_AA64, .opc0 =3D 1, .opc1 =3D 0, .crn =3D 12, .crm =3D 2, .opc2 =3D 1, .access =3D PL1_W, .type =3D ARM_CP_IO | ARM_CP_NO_RAW, diff --git a/target/arm/tcg/trace-events b/target/arm/tcg/trace-events index 13e15cfcfc..fcb3106a96 100644 --- a/target/arm/tcg/trace-events +++ b/target/arm/tcg/trace-events @@ -5,3 +5,4 @@ gicv5_recalc_ppi_hppi(int domain, uint32_t id, uint8_t prio) "domain %d ne= w PPI HPPI id 0x%x prio %u" gicv5_gicr_cdia_fail(int domain, const char *reason) "domain %d CDIA attem= pt failed: %s" gicv5_gicr_cdia(int domain, uint32_t id) "domain %d CDIA acknowledge of in= terrupt 0x%x" +gicv5_cdeoi(int domain) "domain %d CDEOI performing priority drop" --=20 2.43.0