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[193.116.198.102]) by smtp.gmail.com with ESMTPSA id e11-20020aa78c4b000000b0065ecdefa57fsm2225648pfd.0.2023.06.25.05.20.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Jun 2023 05:20:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687695653; x=1690287653; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=p/15pLlbxzHEme4kY/b5wt7Kjg5dVBgWuJVjMRXXaUY=; b=ajWdnXnUH+ckpM6/WSess8ewYF+4ZueIZZOvIwcUZCTp5zxoxJNxRY+r/xoCzIjXg7 umTLXtQLhKdCCEpOfXpCI7tFi3dYiD/xRjMzm8UKwCtxlE4lgiDM5SyMSvAa/apeCmn8 +ssbTRS2NJYSXTeIkpO2JxMTxwWlQf8AsxB0TU8qQnXRaK0C66LsUFakctWcxk5v+qSZ UIy8sJlpQOHVhoBMGNw0JiWGwguDlAtZJoDxqitjpTiWXdXTJMu6NLpNuBFiwOopldDG CqRVwblVyR70CZhso+enyMJZuOtqgOJbfzvZFG+WdYM65P5Zs6TpZAN497yCqe0MCcum i+1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687695653; x=1690287653; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=p/15pLlbxzHEme4kY/b5wt7Kjg5dVBgWuJVjMRXXaUY=; b=PJoFKka63edUUamv7N01YvfInijZvpa1wcTohjOzQPS8uq9EnRL7aNmtoGOFxrYF5c Y71p/fRb1DZX/15nJn0YYqbXiO3t/lUxSS7UJ26mC/RXC04pEeFQw662sjDs3EL29gNA kX/K/7k80wv9iZcNRADStxrywqk7wk27tQXavUCvHyqkgh/6dKucTHD4Yqm1kLCyL+3D hgZx7aTFtImXyUl9I/UxJW/wOd56tE9g/eC/S5tsCVBTsWIi0aNU5S+w+2zlGRgK1qip tu1I3M+XTEvQJLiYrgkUVEz9fNx9D5AfR1DE0KKxHCUCI0il1ahFnJiv1YgoPXKGM+LH jHlw== X-Gm-Message-State: AC+VfDx6N7yIrj+kKW7kWs7+h/Pkcp2KkBUoEz3lkpRIyyAWLtf0ZfhP SUi2jWBNOuGwdFoOa42jwMQrHkZYKBo= X-Google-Smtp-Source: ACHHUZ6jKKaHHVvzdX9uENfSSevZNfYFdlbzIZj+v6uDopLpq1UwULIisTXjJvBqB3Vlia/LUd1OyQ== X-Received: by 2002:a05:6a20:151:b0:125:d34f:e905 with SMTP id 17-20020a056a20015100b00125d34fe905mr2883900pzs.37.1687695652713; Sun, 25 Jun 2023 05:20:52 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , qemu-ppc@nongnu.org, Daniel Henrique Barboza , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , David Gibson , Greg Kurz , Harsh Prateek Bora Subject: [PATCH] target/ppc: Make HDECR underflow edge triggered Date: Sun, 25 Jun 2023 22:20:45 +1000 Message-Id: <20230625122045.15544-1-npiggin@gmail.com> X-Mailer: git-send-email 2.40.1 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::42e; envelope-from=npiggin@gmail.com; helo=mail-pf1-x42e.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @gmail.com) X-ZM-MESSAGEID: 1687695690467100002 Content-Type: text/plain; charset="utf-8" HDEC interrupts are edge-triggered on HDECR underflow (notably different from DEC which is level-triggered). HDEC interrupts already clear the irq on delivery so that does not need to be changed. Signed-off-by: Nicholas Piggin Reviewed-by: C=C3=A9dric Le Goater --- hw/ppc/ppc.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c index 7b7db30f95..f4fe1767d6 100644 --- a/hw/ppc/ppc.c +++ b/hw/ppc/ppc.c @@ -789,8 +789,8 @@ static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint6= 4_t *nextp, QEMUTimer *timer, void (*raise_excp)(void *), void (*lower_excp)(PowerPCCPU *), - target_ulong decr, target_ulong value, - int nr_bits) + uint32_t flags, target_ulong decr, + target_ulong value, int nr_bits) { CPUPPCState *env =3D &cpu->env; ppc_tb_t *tb_env =3D env->tb_env; @@ -820,15 +820,15 @@ static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uin= t64_t *nextp, * On MSB edge based DEC implementations the MSB going from 0 -> 1 tri= ggers * an edge interrupt, so raise it here too. */ - if (((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && signed_value < 0) || - ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && signed_value < 0 + if (((flags & PPC_DECR_UNDERFLOW_LEVEL) && signed_value < 0) || + ((flags & PPC_DECR_UNDERFLOW_TRIGGERED) && signed_value < 0 && signed_decr >=3D 0)) { (*raise_excp)(cpu); return; } =20 /* On MSB level based systems a 0 for the MSB stops interrupt delivery= */ - if (signed_value >=3D 0 && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL))= { + if (signed_value >=3D 0 && (flags & PPC_DECR_UNDERFLOW_LEVEL)) { (*lower_excp)(cpu); } =20 @@ -847,8 +847,8 @@ static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu,= target_ulong decr, ppc_tb_t *tb_env =3D cpu->env.tb_env; =20 __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer, - tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr, - value, nr_bits); + tb_env->decr_timer->cb, &cpu_ppc_decr_lower, + tb_env->flags, decr, value, nr_bits); } =20 void cpu_ppc_store_decr(CPUPPCState *env, target_ulong value) @@ -877,8 +877,10 @@ static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cp= u, target_ulong hdecr, ppc_tb_t *tb_env =3D cpu->env.tb_env; =20 if (tb_env->hdecr_timer !=3D NULL) { + /* HDECR (Book3S 64bit) is edge-based, not level like DECR */ __cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer, tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower, + PPC_DECR_UNDERFLOW_TRIGGERED, hdecr, value, nr_bits); } } --=20 2.40.1