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[88.184.113.142]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488d6839981sm48974135e9.21.2026.04.11.08.45.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Apr 2026 08:45:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775922339; x=1776527139; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=U/uR6qw258G23PmDbEC6+qEwH1s4sVRz5k7AU31IC0I=; b=OT6Mt8H3Ww9v07pGnq748gdGW6A/2vPLFXylVAqChU5B2kVKFnueZ3IIEHsrm7QfAM E9UzHVB/04BJauE7xLZU6nKBpMF7mytponJOzxwodRE7rq1uykzUXjo5iDIwFIv31tZk JK84+/85BF9F1YMPDGDwoVSz7EhXYbHpycZmMgTaEwQ9fK4aKZbgQ5CMRKhbY+l6zQAh tvI+/SY7yA1NcqoYENjF4jomKIQFJGAlHRrOs83YeUObrq/n/n3Fy0l+v7H/VYoBBQBa wMg+mJl2Qa6GiLIB0jaS6Si5IfDHX28+uG8XzGbXxww28lvKz2iUlWuYeR+1oCuefD9i fJPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775922339; x=1776527139; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=U/uR6qw258G23PmDbEC6+qEwH1s4sVRz5k7AU31IC0I=; b=R4YAvQx4pSIVQfPiXdoTEkZWfZ5PFKGV5iqgcw5fiGCch3lnj5VxKCoKC/TcU/eIZC G5uJwn4AEGF54PRz9cqhKTKWQ2GSwsjYHygrHVXQ9AWfdxWQbdJbuHFg0940YBGrQegd yQofLQsvmzJlNNuv/HvOxFsM7sUH7BmBjnhA9Wn4z/+83hKTz20TYxWqxZSTJRPRNCqj P4Ap5+rbYZwLMeYYoIUt65QdcVmm124ve3c5yxdr512N00njfNGLKoX32qjFBd8TIpI7 /Gg2OYDDiKH/SaMY1/JmQWrRCXhkRDT4U8WZDoN90QgN9aupp1KxK7qIU1n62AcUJ2bM Iusg== X-Forwarded-Encrypted: i=1; AJvYcCUobfk1AhTkbpxJWXjVUELyrXUuXmRUPH/8sY8Jz1SrADTQU09PeVAnRd1d6bdP5MkGT5ddkxdosZN6@nongnu.org X-Gm-Message-State: AOJu0YyknMLKjyY3kcT8/jTaggyP+YeMsLHZdqpyo2CeybIwBeZUq5x7 5sDOmtwibuc7UgYFSRraAr0rttUADknftd+BteCY1DDf2RUNLVBAjVDX X-Gm-Gg: AeBDiet72OlnOFRGpePdGPeIfWL9o3n0VQHGAx249Kyp/UPwhcxk35bVUXejrHDKAmR KVPYxWLyhIT0NLpjQ4UZCKWpk7zUjGHjVr1z3je8B9qIqFEOiRTKu7jYKo5lkQ1pgtPFtT/h/DR aYPJ2avIBuISOV2+LElLJnMRttjqGqZxSKQBqVbUBYnhU8ccbowpJM8BXl0V4e6wTQQQ7w+DWSd +pCeHYzlKA3KGFZGHVcOWtbOmVlqNabQ7py9kiTn7lodY5bltkCxkXJCqpIcZE+KQMC3yprR+B6 qoMiiJos//tjBRh2bsqqyHhz7qr1pPDFCWSLOExxIprcnD6naAZmOhaJZQk5PzIS62DeVEwHrpF xMJY3l38wvWc0V5LDnIfDq/RoHC/rMYm4hRGjU9vZwcNMr2pj+h4fqkkVrWokkBBecp67aMd9Zw duD3q+RMUp8pxWhOGp1pOcp01k+1p6Rur46FxFxbUjdkEiNKTTssTSh5WGOG190jB+JqAVAHa7Z ypsyzw89TUkwg1qOrkCMA1de5PBk5hlBpyF5+g= X-Received: by 2002:a05:600c:8591:b0:488:a824:fe04 with SMTP id 5b1f17b1804b1-488d6abe9e4mr68536955e9.26.1775922338396; Sat, 11 Apr 2026 08:45:38 -0700 (PDT) From: Vivien LEGER To: qemu-ppc@nongnu.org Cc: shentey@gmail.com, qemu-devel@nongnu.org, Vivien LEGER Subject: [PATCH] hw/ppc/e500: fix bus-frequency property hardcoded to zero in CPU FDT node Date: Sat, 11 Apr 2026 17:45:35 +0200 Message-ID: <20260411154535.1451361-1-vivien.leger@gmail.com> X-Mailer: git-send-email 2.53.0 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=lists1p.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::334; envelope-from=vivien.leger@gmail.com; helo=mail-wm1-x334.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 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 11 Apr 2026 11:52:46 -0400 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 @gmail.com) X-ZM-MESSAGEID: 1775922815308158500 Content-Type: text/plain; charset="utf-8" The bus-frequency property in the CPU FDT node was hardcoded to 0. This is incorrect - it should reflect the actual platform bus clock frequency, as firmware and RTOSes use it to derive peripheral clock rates. Notably, the RTEMS QorIQ BSP uses bus-frequency to program the MPIC global timer interval. With bus-frequency=3D0, the timer interval overflows to ~85 seconds, preventing any clock interrupts from firing. Fix by adding a bus_freq field to PPCE500MachineClass and using it in the FDT generator. Set bus_freq =3D PLATFORM_CLK_FREQ_HZ (400MHz) for existing machines, matching the existing clock_freq value. Signed-off-by: Vivien LEGER Reviewed-by: Bernhard Beschow --- hw/ppc/e500.c | 2 +- hw/ppc/e500.h | 1 + hw/ppc/e500plat.c | 1 + hw/ppc/mpc8544ds.c | 1 + 4 files changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c index d6ca2e8..5be2f20 100644 --- a/hw/ppc/e500.c +++ b/hw/ppc/e500.c @@ -518,7 +518,7 @@ static int ppce500_load_device_tree(PPCE500MachineState= *pms, env->icache_line_size); qemu_fdt_setprop_cell(fdt, cpu_name, "d-cache-size", 0x8000); qemu_fdt_setprop_cell(fdt, cpu_name, "i-cache-size", 0x8000); - qemu_fdt_setprop_cell(fdt, cpu_name, "bus-frequency", 0); + qemu_fdt_setprop_cell(fdt, cpu_name, "bus-frequency", pmc->bus_fre= q); if (cpu->cpu_index) { qemu_fdt_setprop_string(fdt, cpu_name, "status", "disabled"); qemu_fdt_setprop_string(fdt, cpu_name, "enable-method", diff --git a/hw/ppc/e500.h b/hw/ppc/e500.h index 11f8ae5..6d56c7b 100644 --- a/hw/ppc/e500.h +++ b/hw/ppc/e500.h @@ -40,6 +40,7 @@ struct PPCE500MachineClass { hwaddr pci_mmio_bus_base; hwaddr spin_base; uint32_t clock_freq; + uint32_t bus_freq; uint32_t tb_freq; }; =20 diff --git a/hw/ppc/e500plat.c b/hw/ppc/e500plat.c index ca56472..85cec81 100644 --- a/hw/ppc/e500plat.c +++ b/hw/ppc/e500plat.c @@ -94,6 +94,7 @@ static void e500plat_machine_class_init(ObjectClass *oc, = const void *data) pmc->pci_mmio_bus_base =3D 0xE0000000ULL; pmc->spin_base =3D 0xFEF000000ULL; pmc->clock_freq =3D PLATFORM_CLK_FREQ_HZ; + pmc->bus_freq =3D PLATFORM_CLK_FREQ_HZ; pmc->tb_freq =3D PLATFORM_CLK_FREQ_HZ; =20 mc->desc =3D "generic paravirt e500 platform"; diff --git a/hw/ppc/mpc8544ds.c b/hw/ppc/mpc8544ds.c index 5826985..d022761 100644 --- a/hw/ppc/mpc8544ds.c +++ b/hw/ppc/mpc8544ds.c @@ -56,6 +56,7 @@ static void mpc8544ds_machine_class_init(ObjectClass *oc,= const void *data) pmc->pci_pio_base =3D 0xE1000000ULL; pmc->spin_base =3D 0xEF000000ULL; pmc->clock_freq =3D PLATFORM_CLK_FREQ_HZ; + pmc->bus_freq =3D PLATFORM_CLK_FREQ_HZ; pmc->tb_freq =3D PLATFORM_CLK_FREQ_HZ; =20 mc->desc =3D "mpc8544ds"; --=20 2.53.0