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authorLinus Torvalds <torvalds@linux-foundation.org>2023-04-09 10:00:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2023-04-09 10:00:16 -0700
commit4ba115e2694dc9a10abfe94766d70b64ae9479c7 (patch)
tree573e42a9734b3c8e2f1ca6ef20d962edbd4620e5
parentc08cfd6716a170c549c1140f1d4a0e749c888a79 (diff)
parent81515ecf155a38f3532bf5ddef88d651898df6be (diff)
Merge tag 'x86_urgent_for_v6.3_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov: - Add a new Intel Arrow Lake CPU model number - Fix a confusion about how to check the version of the ACPI spec which supports a "online capable" bit in the MADT table which lead to a bunch of boot breakages with Zen1 systems and VMs * tag 'x86_urgent_for_v6.3_rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu: Add model number for Intel Arrow Lake processor x86/acpi/boot: Correct acpi_is_processor_usable() check x86/ACPI/boot: Use FADT version to check support for online capable
-rw-r--r--arch/x86/include/asm/intel-family.h2
-rw-r--r--arch/x86/kernel/acpi/boot.c9
2 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/include/asm/intel-family.h b/arch/x86/include/asm/intel-family.h
index cbaf174d8efd..b3af2d45bbbb 100644
--- a/arch/x86/include/asm/intel-family.h
+++ b/arch/x86/include/asm/intel-family.h
@@ -125,6 +125,8 @@
#define INTEL_FAM6_LUNARLAKE_M 0xBD
+#define INTEL_FAM6_ARROWLAKE 0xC6
+
/* "Small Core" Processors (Atom/E-Core) */
#define INTEL_FAM6_ATOM_BONNELL 0x1C /* Diamondville, Pineview */
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 1c38174b5f01..0dac4ab5b55b 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -146,7 +146,11 @@ 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 6.3 and newer support the online capable bit. */
+ if (acpi_gbl_FADT.header.revision > 6 ||
+ (acpi_gbl_FADT.header.revision == 6 &&
+ acpi_gbl_FADT.minor_revision >= 3))
acpi_support_online_capable = true;
default_acpi_madt_oem_check(madt->header.oem_id,
@@ -193,7 +197,8 @@ 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))
+ if (!acpi_support_online_capable ||
+ (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
return true;
return false;