Date: Fri, 03 Jul 2026 15:33:17 +0000 From: Olivier Certner <olce@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: c3c8f4d9e662 - main - cpu: New cpu_get_pcpuid(), retrieves internal CPU ID Message-ID: <6a47d63d.46209.5445b6f0@gitrepo.freebsd.org>
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The branch main has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=c3c8f4d9e66287b24af2b3881c528236b836f2f1 commit c3c8f4d9e66287b24af2b3881c528236b836f2f1 Author: Olivier Certner <olce@FreeBSD.org> AuthorDate: 2026-06-26 22:17:35 +0000 Commit: Olivier Certner <olce@FreeBSD.org> CommitDate: 2026-07-03 15:32:25 +0000 cpu: New cpu_get_pcpuid(), retrieves internal CPU ID It is a handy shortcut that will be used extensively in hwpstate_intel(4) and hwpstate_amd(4). Warn users that it panics if the parent bus does not provide the CPU_IVAR_PCPU instance variable. That condition should be tested by callers (doing so once is enough). Suggest to do that in driver's attach method. Reviewed by: jhb (code) Event: Halifax Hackathon 202606 Location: Seat 36K in AC667, waiting for a gate at Montréal-Trudeau Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D57897 --- sys/sys/cpu.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/sys/sys/cpu.h b/sys/sys/cpu.h index 21e79e6db6a4..9156fa9f723d 100644 --- a/sys/sys/cpu.h +++ b/sys/sys/cpu.h @@ -51,6 +51,17 @@ cpu_get_pcpu(device_t dev) return ((struct pcpu *)v); } +/* + * Assumes the parent bus sets the CPU_IVAR_PCPU instance variable, which most + * CPU buses do. A panic will ensure if not the case. Calling devices should + * check for that condition (most probably in their attach function). + */ +static __inline u_int +cpu_get_pcpuid(device_t dev) +{ + return (cpu_get_pcpu(dev)->pc_cpuid); +} + static __inline int32_t cpu_get_nominal_mhz(device_t dev) {home | help
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