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Re: [PATCH v9 4/7] x86/acpi: Add acpi_get_cpu_uid() implementation and update Xen users
- To: Chengwen Feng <fengchengwen@xxxxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, "Rafael J . Wysocki" <rafael@xxxxxxxxxx>
- From: Jürgen Groß <jgross@xxxxxxxx>
- Date: Thu, 19 Mar 2026 08:05:33 +0100
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- Cc: Jonathan Corbet <corbet@xxxxxxx>, Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>, Huacai Chen <chenhuacai@xxxxxxxxxx>, WANG Xuerui <kernel@xxxxxxxxxx>, Paul Walmsley <pjw@xxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Albert Ou <aou@xxxxxxxxxxxxxxxxx>, Alexandre Ghiti <alex@xxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, "H . Peter Anvin" <hpa@xxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Len Brown <lenb@xxxxxxxxxx>, Sunil V L <sunilvl@xxxxxxxxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>, Kees Cook <kees@xxxxxxxxxx>, Yanteng Si <si.yanteng@xxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, Kai Huang <kai.huang@xxxxxxxxx>, Tom Lendacky <thomas.lendacky@xxxxxxx>, Thomas Huth <thuth@xxxxxxxxxx>, Thorsten Blum <thorsten.blum@xxxxxxxxx>, Kevin Loughlin <kevinloughlin@xxxxxxxxxx>, Zheyun Shen <szy0127@xxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>, Xin Li <xin@xxxxxxxxx>, "Ahmed S . Darwish" <darwi@xxxxxxxxxxxxx>, Sohil Mehta <sohil.mehta@xxxxxxxxx>, Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, James Clark <james.clark@xxxxxxxxxx>, Besar Wicaksono <bwicaksono@xxxxxxxxxx>, Ma Ke <make24@xxxxxxxxxxx>, Wei Huang <wei.huang2@xxxxxxx>, Andy Gospodarek <andrew.gospodarek@xxxxxxxxxxxx>, Somnath Kotur <somnath.kotur@xxxxxxxxxxxx>, punit.agrawal@xxxxxxxxxxxxxxxx, guohanjun@xxxxxxxxxx, suzuki.poulose@xxxxxxx, ryan.roberts@xxxxxxx, chenl311@xxxxxxxxxxxxxxx, masahiroy@xxxxxxxxxx, wangyuquan1236@xxxxxxxxxxxxxx, anshuman.khandual@xxxxxxx, heinrich.schuchardt@xxxxxxxxxxxxx, Eric.VanTassell@xxxxxxx, wangzhou1@xxxxxxxxxxxxx, wanghuiqiang@xxxxxxxxxx, liuyonglong@xxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, loongarch@xxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-acpi@xxxxxxxxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx
- Delivery-date: Thu, 19 Mar 2026 07:05:44 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 19.03.26 07:57, Chengwen Feng wrote:
Add arch-specific acpi_get_cpu_uid() for x86:
- Declare acpi_get_cpu_uid() in arch/x86/include/asm/acpi.h
- Implement acpi_get_cpu_uid() with input parameter validation
- Replace cpu_acpi_id() with acpi_get_cpu_uid() in Xen-related code
- Remove the now-unused cpu_acpi_id() function
Extend the unified ACPI CPU UID interface to x86, ensuring consistent
error handling and input validation across all ACPI-enabled
architectures.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Chengwen Feng <fengchengwen@xxxxxxxxxx>
Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
Juergen
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