From: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
To: 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,
linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev,
x86@kernel.org, linux-csky@vger.kernel.org,
linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-parisc@vger.kernel.org
Cc: Salil Mehta <salil.mehta@huawei.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
jianyong.wu@arm.com, justin.he@arm.com,
James Morse <james.morse@arm.com>
Subject: [PATCH 12/39] ia64/topology: Switch over to GENERIC_CPU_DEVICES
Date: Tue, 24 Oct 2023 16:17:11 +0100 [thread overview]
Message-ID: <E1qvJ9b-00AqPz-1E@rmk-PC.armlinux.org.uk> (raw)
In-Reply-To: <ZTffkAdOqL2pI2la@shell.armlinux.org.uk>
From: James Morse <james.morse@arm.com>
ia64 has its own arch specific data structure for cpus: struct ia64_cpu.
This has one member, making ia64's cpu_devices the same as that
provided be GENERIC_CPU_DEVICES.
ia64 craetes a percpu struct ia64_cpu called cpu_devices, which has no
users. Instead it uses the struct ia64_cpu named sysfs_cpus allocated at
boot.
Remove the arch specific structure allocation and initialisation.
ia64's arch_register_cpu() now overrides the weak version from
GENERIC_CPU_DEVICES, and uses the percpu cpu_devices defined by
core code.
All uses of sysfs_cpus are changed to use the percpu cpu_devices.
This is an intermediate step to the logic being moved to drivers/acpi,
where GENERIC_CPU_DEVICES will do the work when booting with acpi=off.
This patch also has the effect of moving the registration of CPUs from
subsys to driver core initialisation, prior to any initcalls running.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
Changes since RFC v2:
* Add note about initialisation order change.
---
arch/ia64/Kconfig | 1 +
arch/ia64/include/asm/cpu.h | 6 ------
arch/ia64/kernel/topology.c | 35 +++++------------------------------
3 files changed, 6 insertions(+), 36 deletions(-)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index a3bfd42467ab..06692e1c7c62 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -42,6 +42,7 @@ config IA64
select HAVE_FUNCTION_DESCRIPTORS
select HAVE_VIRT_CPU_ACCOUNTING
select HUGETLB_PAGE_SIZE_VARIABLE if HUGETLB_PAGE
+ select GENERIC_CPU_DEVICES
select GENERIC_IRQ_PROBE
select GENERIC_PENDING_IRQ if SMP
select GENERIC_IRQ_SHOW
diff --git a/arch/ia64/include/asm/cpu.h b/arch/ia64/include/asm/cpu.h
index 642d71675ddb..3b36c6a382bb 100644
--- a/arch/ia64/include/asm/cpu.h
+++ b/arch/ia64/include/asm/cpu.h
@@ -7,12 +7,6 @@
#include <linux/topology.h>
#include <linux/percpu.h>
-struct ia64_cpu {
- struct cpu cpu;
-};
-
-DECLARE_PER_CPU(struct ia64_cpu, cpu_devices);
-
DECLARE_PER_CPU(int, cpu_state);
#endif /* _ASM_IA64_CPU_H_ */
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 741863a187a6..8f5cafde2bc9 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -26,8 +26,6 @@
#include <asm/numa.h>
#include <asm/cpu.h>
-static struct ia64_cpu *sysfs_cpus;
-
void arch_fix_phys_package_id(int num, u32 slot)
{
#ifdef CONFIG_SMP
@@ -41,50 +39,27 @@ EXPORT_SYMBOL_GPL(arch_fix_phys_package_id);
#ifdef CONFIG_HOTPLUG_CPU
int __ref arch_register_cpu(int num)
{
+ struct cpu *cpu = &per_cpu(cpu_devices, num);
+
/*
* If CPEI can be re-targeted or if this is not
* CPEI target, then it is hotpluggable
*/
if (can_cpei_retarget() || !is_cpu_cpei_target(num))
- sysfs_cpus[num].cpu.hotpluggable = 1;
+ cpu->hotpluggable = 1;
map_cpu_to_node(num, node_cpuid[num].nid);
- return register_cpu(&sysfs_cpus[num].cpu, num);
+ return register_cpu(cpu, num);
}
EXPORT_SYMBOL(arch_register_cpu);
void __ref arch_unregister_cpu(int num)
{
- unregister_cpu(&sysfs_cpus[num].cpu);
+ unregister_cpu(&per_cpu(cpu_devices, num));
unmap_cpu_from_node(num, cpu_to_node(num));
}
EXPORT_SYMBOL(arch_unregister_cpu);
-#else
-int __init arch_register_cpu(int num)
-{
- return register_cpu(&sysfs_cpus[num].cpu, num);
-}
#endif /*CONFIG_HOTPLUG_CPU*/
-
-static int __init topology_init(void)
-{
- int i, err = 0;
-
- sysfs_cpus = kcalloc(NR_CPUS, sizeof(struct ia64_cpu), GFP_KERNEL);
- if (!sysfs_cpus)
- panic("kzalloc in topology_init failed - NR_CPUS too big?");
-
- for_each_present_cpu(i) {
- if((err = arch_register_cpu(i)))
- goto out;
- }
-out:
- return err;
-}
-
-subsys_initcall(topology_init);
-
-
/*
* Export cpu cache information through sysfs
*/
--
2.30.2
next prev parent reply other threads:[~2023-10-24 15:18 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-24 15:15 [RFC PATCH v3 00/39] ACPI/arm64: add support for virtual cpuhotplug Russell King (Oracle)
2023-10-24 15:16 ` [PATCH 01/39] parisc: simplify smp_prepare_boot_cpu() Russell King (Oracle)
2023-10-24 15:16 ` [PATCH 02/39] ACPI: Use the acpi_device_is_present() helper in more places Russell King
2023-10-24 15:16 ` [PATCH 03/39] ACPI: Rename acpi_scan_device_not_present() to be about enumeration Russell King
2023-10-24 15:16 ` [PATCH 04/39] arm64, irqchip/gic-v3, ACPI: Move MADT GICC enabled check into a helper Russell King
2023-10-24 15:16 ` [PATCH 05/39] ACPI: Move ACPI_HOTPLUG_CPU to be disabled on arm64 and riscv Russell King
2023-10-24 15:16 ` [PATCH 06/39] drivers: base: Use present CPUs in GENERIC_CPU_DEVICES Russell King
2023-10-24 15:16 ` [PATCH 07/39] drivers: base: Allow parts of GENERIC_CPU_DEVICES to be overridden Russell King
2023-10-24 15:16 ` [PATCH 08/39] drivers: base: Move cpu_dev_init() after node_dev_init() Russell King
2023-10-24 15:16 ` [PATCH 09/39] drivers: base: remove unnecessary call to register_cpu_under_node() Russell King (Oracle)
2023-10-24 15:17 ` [PATCH 10/39] drivers: base: Print a warning instead of panic() when register_cpu() fails Russell King
2023-10-24 15:17 ` [PATCH 11/39] arm64: setup: Switch over to GENERIC_CPU_DEVICES using arch_register_cpu() Russell King
2023-10-24 15:17 ` Russell King [this message]
2023-10-24 15:17 ` [PATCH 13/39] x86: intel_epb: Don't rely on link order Russell King
2023-10-24 15:17 ` [PATCH 14/39] x86/topology: Switch over to GENERIC_CPU_DEVICES Russell King
2023-10-24 15:17 ` [PATCH 15/39] LoongArch: " Russell King
2023-10-24 15:17 ` [PATCH 16/39] riscv: " Russell King
2023-10-24 15:17 ` [PATCH 17/39] arch_topology: Make register_cpu_capacity_sysctl() tolerant to late CPUs Russell King
2023-10-24 15:17 ` [PATCH 18/39] ACPI: Only enumerate enabled (or functional) devices Russell King
2023-10-24 18:07 ` Rafael J. Wysocki
2023-10-24 15:17 ` [PATCH 19/39] ACPI: processor: Add support for processors described as container packages Russell King
2023-10-24 15:17 ` [PATCH 20/39] ACPI: processor: Register CPUs that are online, but not described in the DSDT Russell King
2023-10-24 15:17 ` [PATCH 21/39] ACPI: processor: Register all CPUs from acpi_processor_get_info() Russell King
2023-10-24 15:18 ` [PATCH 22/39] ACPI: Rename ACPI_HOTPLUG_CPU to include 'present' Russell King
2023-10-24 15:18 ` [PATCH 23/39] drivers: base: Implement weak arch_unregister_cpu() Russell King
2023-10-24 15:18 ` [PATCH 24/39] ACPI: Move acpi_bus_trim_one() before acpi_scan_hot_remove() Russell King
2023-10-24 15:18 ` [PATCH 25/39] ACPI: Rename acpi_processor_hotadd_init and remove pre-processor guards Russell King
2023-10-24 15:18 ` [PATCH 26/39] ACPI: Add post_eject to struct acpi_scan_handler for cpu hotplug Russell King
2023-10-24 15:18 ` [PATCH 27/39] ACPI: Check _STA present bit before making CPUs not present Russell King
2023-10-24 15:18 ` [PATCH 28/39] ACPI: Warn when the present bit changes but the feature is not enabled Russell King
2023-10-24 15:18 ` [PATCH 29/39] LoongArch: Use the __weak version of arch_unregister_cpu() Russell King
2023-10-24 15:18 ` [PATCH 30/39] arm64: acpi: Move get_cpu_for_acpi_id() to a header Russell King
2023-10-24 15:18 ` [PATCH 31/39] ACPICA: Add new MADT GICC flags fields Russell King
2023-10-24 15:18 ` [PATCH 32/39] irqchip/gic-v3: Don't return errors from gic_acpi_match_gicc() Russell King
2023-10-24 15:18 ` [PATCH 33/39] irqchip/gic-v3: Add support for ACPI's disabled but 'online capable' CPUs Russell King
2023-10-24 15:19 ` [PATCH 34/39] arm64: psci: Ignore DENIED CPUs Russell King
2023-11-16 7:45 ` Jianyong Wu
2023-11-20 9:24 ` Russell King (Oracle)
2023-11-20 9:36 ` Jianyong Wu
2023-11-20 9:58 ` Russell King (Oracle)
2023-11-21 1:44 ` Jianyong Wu
2023-10-24 15:19 ` [PATCH 35/39] ACPI: add support to register CPUs based on the _STA enabled bit Russell King
2023-10-24 15:19 ` [PATCH 36/39] arm64: document virtual CPU hotplug's expectations Russell King
2023-10-24 15:19 ` [PATCH 37/39] ACPI: Add _OSC bits to advertise OS support for toggling CPU present/enabled Russell King
2023-10-24 15:19 ` [PATCH 38/39] cpumask: Add enabled cpumask for present CPUs that can be brought online Russell King
2023-10-24 15:32 ` Andy Shevchenko
2023-10-24 16:02 ` Greg Kroah-Hartman
2023-10-24 16:05 ` Russell King (Oracle)
2023-10-24 15:19 ` [PATCH 39/39] ACPI: processor: Only call arch_unregister_cpu() if HOTPLUG_CPU is selected Russell King
2023-10-24 16:31 ` [RFC PATCH v3 00/39] ACPI/arm64: add support for virtual cpuhotplug Russell King (Oracle)
2023-10-24 18:26 ` Rafael J. Wysocki
2023-10-24 19:28 ` Russell King (Oracle)
2023-12-04 18:23 ` Russell King (Oracle)
2023-12-12 19:58 ` Russell King (Oracle)
2023-12-12 20:05 ` Rafael J. Wysocki
2023-12-12 20:16 ` Russell King (Oracle)
2023-10-30 16:41 ` Miguel Luis
2023-10-30 17:51 ` Russell King (Oracle)
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