diff options
Diffstat (limited to 'sys-kernel_arch-sources-g14_files-9008-fix-cpu-hotplug.patch')
| -rw-r--r-- | sys-kernel_arch-sources-g14_files-9008-fix-cpu-hotplug.patch | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/sys-kernel_arch-sources-g14_files-9008-fix-cpu-hotplug.patch b/sys-kernel_arch-sources-g14_files-9008-fix-cpu-hotplug.patch deleted file mode 100644 index f80a0850d67a..000000000000 --- a/sys-kernel_arch-sources-g14_files-9008-fix-cpu-hotplug.patch +++ /dev/null @@ -1,73 +0,0 @@ -Date: Fri, 13 Aug 2021 11:18:42 -0500 [thread overview] -Message-ID: <20210813161842.222414-1-mario.limonciello@amd.com> (raw) - -A number of systems are showing "hotplug capable" CPUs when they -are not really hotpluggable. This is because the MADT has extra -CPU entries to support different CPUs that may be inserted into -the socket with different numbers of cores. - -Starting with ACPI 6.3 the spec has an Online Capable bit in the -MADT used to determine whether or not a CPU is hotplug capable -when the enabled bit is not set. - -Link: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html?#local-apic-flags -Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> ---- - arch/x86/kernel/acpi/boot.c | 10 ++++++++++ - include/acpi/actbl2.h | 1 + - 2 files changed, 11 insertions(+) - -Changes from v1->v2: - * Check the revision field in MADT to determine if it matches the - bump from ACPI 6.3 as suggested by Hanjun Guo - * Update description - -diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c -index e55e0c1fad8c..bfa69a5c9c0b 100644 ---- a/arch/x86/kernel/acpi/boot.c -+++ b/arch/x86/kernel/acpi/boot.c -@@ -53,6 +53,8 @@ int acpi_ioapic; - int acpi_strict; - int acpi_disable_cmcff; - -+bool acpi_support_online_capable; -+ - /* ACPI SCI override configuration */ - u8 acpi_sci_flags __initdata; - u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; -@@ -138,6 +140,8 @@ static int __init acpi_parse_madt(struct acpi_table_header *table) - - pr_debug("Local APIC address 0x%08x\n", madt->address); - } -+ if (madt->header.revision >= 5) -+ acpi_support_online_capable = true; - - default_acpi_madt_oem_check(madt->header.oem_id, - madt->header.oem_table_id); -@@ -239,6 +243,12 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) - if (processor->id == 0xff) - return 0; - -+ /* don't register processors that can not be onlined */ -+ if (acpi_support_online_capable && -+ !(processor->lapic_flags & ACPI_MADT_ENABLED) && -+ !(processor->lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) -+ return 0; -+ - /* - * We need to register disabled CPU as well to permit - * counting disabled CPUs. This allows us to size -diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h -index 2069ac38a4e2..fae45e383987 100644 ---- a/include/acpi/actbl2.h -+++ b/include/acpi/actbl2.h -@@ -808,6 +808,7 @@ struct acpi_madt_multiproc_wakeup_mailbox { - /* MADT Local APIC flags */ - - #define ACPI_MADT_ENABLED (1) /* 00: Processor is usable if set */ -+#define ACPI_MADT_ONLINE_CAPABLE (2) /* 01: System HW supports enabling processor at runtime */ - - /* MADT MPS INTI flags (inti_flags) */ - --- -2.25.1
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