diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-20 18:32:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-02-20 18:32:55 -0800 |
| commit | 35011c67c8b7ff96c4e2dd892099ba643f9ae11e (patch) | |
| tree | cff8f69e919dbb5b558d890077a006bc5292ad25 /arch/x86/kernel/acpi/boot.c | |
| parent | 6be3dafc7c1d323debb5910d697c5cd2cb19825f (diff) | |
| parent | e2869bd7af608c343988429ceb1c2fe99644a01f (diff) | |
Merge tag 'x86-boot-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
- Robustify/fix calling startup_{32,64}() from the decompressor code,
and removing x86 quirk from scripts/head-object-list.txt as a result.
- Do not register processors that cannot be onlined for x2APIC
* tag 'x86-boot-2023-02-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/acpi/boot: Do not register processors that cannot be onlined for x2APIC
scripts/head-object-list: Remove x86 from the list
x86/boot: Robustify calling startup_{32,64}() from the decompressor code
Diffstat (limited to 'arch/x86/kernel/acpi/boot.c')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 4177577c173b..1c38174b5f01 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -188,6 +188,17 @@ static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) return cpu; } +static bool __init acpi_is_processor_usable(u32 lapic_flags) +{ + if (lapic_flags & ACPI_MADT_ENABLED) + return true; + + if (acpi_support_online_capable && (lapic_flags & ACPI_MADT_ONLINE_CAPABLE)) + return true; + + return false; +} + static int __init acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) { @@ -212,6 +223,10 @@ acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) if (apic_id == 0xffffffff) return 0; + /* don't register processors that cannot be onlined */ + if (!acpi_is_processor_usable(processor->lapic_flags)) + return 0; + /* * We need to register disabled CPU as well to permit * counting disabled CPUs. This allows us to size @@ -250,9 +265,7 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 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)) + if (!acpi_is_processor_usable(processor->lapic_flags)) return 0; /* |