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[81.2.115.145]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-483a9b21ceasm200155625e9.0.2026.02.23.09.03.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Feb 2026 09:03:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1771866189; x=1772470989; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=MdqR4vhujZdCIee6J+u4O26y6fOSqJ7/xzfHb6eSoPU=; b=IY4s16KgSvmOVsWtqYBgYlMK/KL25S0Qwkh+yF8p13FnRQpDMt5rVSDgz+74dTk/Tp U4jkkQVDeQCgOP4gxfK58zfNQHcxEmCMJUaL6WkjdHCCdP1NWjUARVYcELGdzuQTycaK PeaU/fdKOXNZX/LoGC2w2zs7UOO3/ImAA3UnCPWT+GLm+dE4hwXJZSq0N94wUsCj24FU ar6kKIgOBfrg0OcAJWuW4WJiGu87WlK2uptPmvU+EbQPE5KsUMfFsh1A7vXVR9zu/Hzg qSE5fW+W6PkCFvO4vMQzX//ikofrq3TpuwNam/G2E52e0BaDSU9poq8Ke1A4qDngD2v6 i/9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771866189; x=1772470989; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=MdqR4vhujZdCIee6J+u4O26y6fOSqJ7/xzfHb6eSoPU=; b=QFi+QLw/N6LF8dAgW4NcnGTfR3zxRPntiXNZIOvyNf8XR8VVazwEPGdCRi/jGJSE4r nyBoyTwxr/NrUh892YpfDJy+pwos0jLslgmr8cpe7D1sTG5Qj3STkhpMwv25Htn8STpu 6dJXQYnKUkUP7Q0WeUv7w+0oRsWkFQIgZYKhDPq7dIRSmjY+3bdG4ZQ4hfsIfXxLG/hm J4Z4jh0BL7mHqitLEijLCL+Wc9RLXitBukrWb0eLB0Ax1hmZPtGXpGYSf41YFRTSm0HI YTbPZ2D+7xGCiTQnyn0TmV4QHETcs94CK7xAyJuTrbCszSLTwoAUkbNOZrhedKw/glYQ yzzg== X-Forwarded-Encrypted: i=1; AJvYcCXFkYezvwAc/UlrLD9YBXoHqSjByKjIswbTCS8E7KvnktVmY7cKCn9ADvdrlgChCeBY1FJf4oFWkAxM@nongnu.org X-Gm-Message-State: AOJu0YyjAdrnhXBG0ngLmtLuItXCANrcisNsHLrsvL3HFL3DPKrEPYp+ nr/YEoGa9sAMe8fD9xkxRz+IhAAcf/3qMggSpX1GIDyKGoby6uK+w/kXxSNB+MGogG7WrS2VZNn 0+wRa X-Gm-Gg: AZuq6aK+Gljf4EINqQf8ht0AbFw5yprrhOdSYqGlP6aFXVv+UOd3ade/PauVmPZPna5 l8dKNTjZ/zIjuP/X4LYBAMMcclNqqrTxAva5FtMS1LCKwi8pojrPd6zJBDxeduwxgR3nSHUkqdz d0AmZ7McGU6+8wBfg6Lop1ubazxlELSeuEO0OQXQ97aLNSgb98KkAlesbGHdKb1DQsWv2qhXklC cM3upEWXfzTMbEeRcN7syHQujgz7nqqijNlAdWmaFeIXVr/fQPk085xgc6QqCmnUs1Of+i4YAdm K9F8FR04gkaKHUULUPldjaQkqndo1GLM2X1hsxMHIOm91HbctG7z0d7qFQWZNSJoCQuXHR8+X3a gEcRT5oZkjnVp/bT8v6dcdCTfSu0FSblzPh9+NOLkS4dZKrnWsKq30kSIQq81UnGWvyQ3uyJpa/ KlG8LNSWWCCyw5MSfkAvfY2jfmBkr7SQrUysyzj8lOqvUaPyicS4SCYx75oXdG37NBc4btdSUM3 OiA+p8DZDafy0KoUkBGK4XEl/jXoz8= X-Received: by 2002:a05:600c:4f13:b0:483:7b99:131d with SMTP id 5b1f17b1804b1-483a94d9b6cmr199133845e9.16.1771866188652; Mon, 23 Feb 2026 09:03:08 -0800 (PST) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 48/65] target/arm: GICv5 cpuif: Implement GIC CDEOI Date: Mon, 23 Feb 2026 17:01:55 +0000 Message-ID: <20260223170212.441276-49-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260223170212.441276-1-peter.maydell@linaro.org> References: <20260223170212.441276-1-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::336; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x336.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: 1771866821778158500 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 d32263a5b7..c830938bdc 100644 --- a/target/arm/tcg/gicv5-cpuif.c +++ b/target/arm/tcg/gicv5-cpuif.c @@ -556,6 +556,22 @@ 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 @@ -608,6 +624,11 @@ 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