Petr Vaněk 8b37357a78 x86/acpi: Don't limit CPUs to 1 for Xen PV guests due to disabled ACPI ... Xen disables ACPI for PV guests in DomU, which causes acpi_mps_check() to return 1 when CONFIG_X86_MPPARSE is not set. As a result, the local APIC is disabled and the guest is later limited to a single vCPU, despite being configured with more. This regression was introduced in version 6.9 in commit 7c0edad364 ("x86/cpu/topology: Rework possible CPU management"), which added an early check that limits CPUs to 1 if apic_is_disabled. Update the acpi_mps_check() logic to return 0 early when running as a Xen PV guest in DomU, preventing APIC from being disabled in this specific case and restoring correct multi-vCPU behaviour. Fixes: 7c0edad364 ("x86/cpu/topology: Rework possible CPU management") Signed-off-by: Petr Vaněk <arkamar@atlas.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250407132445.6732-2-arkamar@atlas.cz		2025-04-07 16:35:21 +02:00
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Makefile	x86/acpi: Add support for CPU offlining for ACPI MADT wakeup method	2024-06-17 17:46:25 +02:00
apei.c	…
boot.c	x86/acpi: Don't limit CPUs to 1 for Xen PV guests due to disabled ACPI	2025-04-07 16:35:21 +02:00
cppc.c	cpufreq/amd-pstate: Replace all AMD_CPPC_* macros with masks	2025-03-06 13:01:25 -06:00
cstate.c	x86/acpi/cstate: Improve Intel Family model checks	2025-03-19 11:19:46 +01:00
madt_playdead.S	x86/cfi: Clean up linkage	2025-02-14 10:32:05 +01:00
madt_wakeup.c	x86/acpi: Replace manual page table initialization with kernel_ident_mapping_init()	2025-03-19 11:12:29 +01:00
sleep.c	x86/smpboot: Support parallel startup of secondary CPUs	2023-05-15 13:45:04 +02:00
sleep.h	x86/acpi: Remove unused extern declaration acpi_copy_wakeup_routine()	2023-06-21 10:57:54 -07:00
wakeup_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
wakeup_64.S	x86/cfi: Clean up linkage	2025-02-14 10:32:05 +01:00