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GET /api/patches/2223107/?format=api
{ "id": 2223107, "url": "http://patchwork.ozlabs.org/api/patches/2223107/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414132100.53861-2-philmd@linaro.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260414132100.53861-2-philmd@linaro.org>", "list_archive_url": null, "date": "2026-04-14T13:20:57", "name": "[PULL,1/3] hw/ppc/e500: fix bus-frequency property hardcoded to zero in CPU FDT node", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "827c01a9f6a654a29a8bbe586514293c075d3c09", "submitter": { "id": 85046, "url": "http://patchwork.ozlabs.org/api/people/85046/?format=api", "name": "Philippe Mathieu-Daudé", "email": "philmd@linaro.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414132100.53861-2-philmd@linaro.org/mbox/", "series": [ { "id": 499841, "url": "http://patchwork.ozlabs.org/api/series/499841/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499841", "date": "2026-04-14T13:20:57", "name": "[PULL,1/3] hw/ppc/e500: fix bus-frequency property hardcoded to zero in CPU FDT node", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499841/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223107/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223107/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=bQ17769N;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2a00:1450:4864:20::329;\n envelope-from=philmd@linaro.org; helo=mail-wm1-x329.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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n 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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Vivien LEGER <vivien.leger@gmail.com>\n\nThe bus-frequency property in the CPU FDT node was hardcoded to 0.\nThis is incorrect - it should reflect the actual platform bus clock\nfrequency, as firmware and RTOSes use it to derive peripheral clock\nrates.\n\nNotably, the RTEMS QorIQ BSP uses bus-frequency to program the MPIC\nglobal timer interval. With bus-frequency=0, the timer interval\noverflows to ~85 seconds, preventing any clock interrupts from firing.\n\nFix by adding a bus_freq field to PPCE500MachineClass and using it in\nthe FDT generator. Set bus_freq = PLATFORM_CLK_FREQ_HZ (400MHz) for\nexisting machines, matching the existing clock_freq value.\n\nSigned-off-by: Vivien LEGER <vivien.leger@gmail.com>\nReviewed-by: Bernhard Beschow <shentey@gmail.com>\nMessage-ID: <20260411154535.1451361-1-vivien.leger@gmail.com>\nSigned-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>\n---\n hw/ppc/e500.h | 1 +\n hw/ppc/e500.c | 2 +-\n hw/ppc/e500plat.c | 1 +\n hw/ppc/mpc8544ds.c | 1 +\n 4 files changed, 4 insertions(+), 1 deletion(-)", "diff": "diff --git a/hw/ppc/e500.h b/hw/ppc/e500.h\nindex 11f8ae53177..6d56c7b4cb2 100644\n--- a/hw/ppc/e500.h\n+++ b/hw/ppc/e500.h\n@@ -40,6 +40,7 @@ struct PPCE500MachineClass {\n hwaddr pci_mmio_bus_base;\n hwaddr spin_base;\n uint32_t clock_freq;\n+ uint32_t bus_freq;\n uint32_t tb_freq;\n };\n \ndiff --git a/hw/ppc/e500.c b/hw/ppc/e500.c\nindex d6ca2e8563a..5be2f2095f6 100644\n--- a/hw/ppc/e500.c\n+++ b/hw/ppc/e500.c\n@@ -518,7 +518,7 @@ static int ppce500_load_device_tree(PPCE500MachineState *pms,\n env->icache_line_size);\n qemu_fdt_setprop_cell(fdt, cpu_name, \"d-cache-size\", 0x8000);\n qemu_fdt_setprop_cell(fdt, cpu_name, \"i-cache-size\", 0x8000);\n- qemu_fdt_setprop_cell(fdt, cpu_name, \"bus-frequency\", 0);\n+ qemu_fdt_setprop_cell(fdt, cpu_name, \"bus-frequency\", pmc->bus_freq);\n if (cpu->cpu_index) {\n qemu_fdt_setprop_string(fdt, cpu_name, \"status\", \"disabled\");\n qemu_fdt_setprop_string(fdt, cpu_name, \"enable-method\",\ndiff --git a/hw/ppc/e500plat.c b/hw/ppc/e500plat.c\nindex ca5647284d0..85cec810d9a 100644\n--- a/hw/ppc/e500plat.c\n+++ b/hw/ppc/e500plat.c\n@@ -94,6 +94,7 @@ static void e500plat_machine_class_init(ObjectClass *oc, const void *data)\n pmc->pci_mmio_bus_base = 0xE0000000ULL;\n pmc->spin_base = 0xFEF000000ULL;\n pmc->clock_freq = PLATFORM_CLK_FREQ_HZ;\n+ pmc->bus_freq = PLATFORM_CLK_FREQ_HZ;\n pmc->tb_freq = PLATFORM_CLK_FREQ_HZ;\n \n mc->desc = \"generic paravirt e500 platform\";\ndiff --git a/hw/ppc/mpc8544ds.c b/hw/ppc/mpc8544ds.c\nindex 582698559d2..d022761cb6d 100644\n--- a/hw/ppc/mpc8544ds.c\n+++ b/hw/ppc/mpc8544ds.c\n@@ -56,6 +56,7 @@ static void mpc8544ds_machine_class_init(ObjectClass *oc, const void *data)\n pmc->pci_pio_base = 0xE1000000ULL;\n pmc->spin_base = 0xEF000000ULL;\n pmc->clock_freq = PLATFORM_CLK_FREQ_HZ;\n+ pmc->bus_freq = PLATFORM_CLK_FREQ_HZ;\n pmc->tb_freq = PLATFORM_CLK_FREQ_HZ;\n \n mc->desc = \"mpc8544ds\";\n", "prefixes": [ "PULL", "1/3" ] }