From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>, <linux-pm@vger.kernel.org>,
<loongarch@lists.linux.dev>, <linux-acpi@vger.kernel.org>,
<linux-arch@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <kvmarm@lists.linux.dev>,
<x86@kernel.org>, Russell King <linux@armlinux.org.uk>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Miguel Luis <miguel.luis@oracle.com>,
James Morse <james.morse@arm.com>,
Salil Mehta <salil.mehta@huawei.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Hanjun Guo <guohanjun@huawei.com>, Gavin Shan <gshan@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>, <linuxarm@huawei.com>,
<justin.he@arm.com>, <jianyong.wu@arm.com>
Subject: [PATCH v9 07/19] ACPI: processor: Add acpi_get_processor_handle() helper
Date: Tue, 30 Apr 2024 15:24:22 +0100 [thread overview]
Message-ID: <20240430142434.10471-8-Jonathan.Cameron@huawei.com> (raw)
In-Reply-To: <20240430142434.10471-1-Jonathan.Cameron@huawei.com>
If CONFIG_ACPI_PROCESSOR provide a helper to retrieve the
acpi_handle for a given CPU allowing access to methods
in DSDT.
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
v9: Tags
---
drivers/acpi/acpi_processor.c | 11 +++++++++++
include/linux/acpi.h | 7 +++++++
2 files changed, 18 insertions(+)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 4a79b42d649e..e8cbe0e40dd0 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -35,6 +35,17 @@ EXPORT_PER_CPU_SYMBOL(processors);
struct acpi_processor_errata errata __read_mostly;
EXPORT_SYMBOL_GPL(errata);
+acpi_handle acpi_get_processor_handle(int cpu)
+{
+ struct acpi_processor *pr;
+
+ pr = per_cpu(processors, cpu);
+ if (pr)
+ return pr->handle;
+
+ return NULL;
+}
+
static int acpi_processor_errata_piix4(struct pci_dev *dev)
{
u8 value1 = 0;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 34829f2c517a..9844a3f9c4e5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -309,6 +309,8 @@ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
int acpi_unmap_cpu(int cpu);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
+acpi_handle acpi_get_processor_handle(int cpu);
+
#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
#endif
@@ -1077,6 +1079,11 @@ static inline bool acpi_sleep_state_supported(u8 sleep_state)
return false;
}
+static inline acpi_handle acpi_get_processor_handle(int cpu)
+{
+ return NULL;
+}
+
#endif /* !CONFIG_ACPI */
extern void arch_post_acpi_subsys_init(void);
--
2.39.2
next prev parent reply other threads:[~2024-04-30 14:28 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 14:24 [PATCH v9 00/19] ACPI/arm64: add support for virtual cpu hotplug Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 01/19] ACPI: processor: Simplify initial onlining to use same path for cold and hotplug Jonathan Cameron
2024-05-02 12:10 ` Miguel Luis
2024-04-30 14:24 ` [PATCH v9 02/19] cpu: Do not warn on arch_register_cpu() returning -EPROBE_DEFER Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 03/19] ACPI: processor: Drop duplicated check on _STA (enabled + present) Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 04/19] ACPI: processor: Return an error if acpi_processor_get_info() fails in processor_add() Jonathan Cameron
2024-05-01 10:18 ` Gavin Shan
2024-05-07 18:55 ` Rafael J. Wysocki
2024-04-30 14:24 ` [PATCH v9 05/19] ACPI: processor: Fix memory leaks in error paths of processor_add() Jonathan Cameron
2024-05-01 10:19 ` Gavin Shan
2024-05-07 18:57 ` Rafael J. Wysocki
2024-04-30 14:24 ` [PATCH v9 06/19] ACPI: processor: Move checks and availability of acpi_processor earlier Jonathan Cameron
2024-05-01 10:33 ` Gavin Shan
2024-05-07 19:04 ` Rafael J. Wysocki
2024-05-08 8:44 ` Jonathan Cameron
2024-04-30 14:24 ` Jonathan Cameron [this message]
2024-05-07 19:05 ` [PATCH v9 07/19] ACPI: processor: Add acpi_get_processor_handle() helper Rafael J. Wysocki
2024-04-30 14:24 ` [PATCH v9 08/19] ACPI: processor: Register deferred CPUs from acpi_processor_get_info() Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 09/19] ACPI: scan: switch to flags for acpi_scan_check_and_detach() Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 10/19] ACPI: Add post_eject to struct acpi_scan_handler for cpu hotplug Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 11/19] arm64: acpi: Move get_cpu_for_acpi_id() to a header Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 12/19] arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry Jonathan Cameron
2024-05-01 11:10 ` Gavin Shan
2024-04-30 14:24 ` [PATCH v9 13/19] irqchip/gic-v3: Don't return errors from gic_acpi_match_gicc() Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 14/19] irqchip/gic-v3: Add support for ACPI's disabled but 'online capable' CPUs Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 15/19] arm64: psci: Ignore DENIED CPUs Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 16/19] arm64: arch_register_cpu() variant to check if an ACPI handle is now available Jonathan Cameron
2024-04-30 14:24 ` [PATCH v9 17/19] arm64: Kconfig: Enable hotplug CPU on arm64 if ACPI_PROCESSOR is enabled Jonathan Cameron
2024-05-01 11:13 ` Gavin Shan
2024-04-30 14:24 ` [PATCH v9 18/19] arm64: document virtual CPU hotplug's expectations Jonathan Cameron
2024-05-01 11:32 ` Gavin Shan
2024-04-30 14:24 ` [PATCH v9 19/19] cpumask: Add enabled cpumask for present CPUs that can be brought online Jonathan Cameron
2024-05-01 11:14 ` Gavin Shan
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