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x86/apic: Use a proper define for invalid ACPI CPU ID

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The ACPI ID for CPUs is preset with U32_MAX which is completely non
obvious. Use a proper define for it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://lore.kernel.org/r/20240212154640.177504138@linutronix.de
This commit is contained in:
Thomas Gleixner 2024-02-13 22:05:21 +01:00
parent 4a5f72a4a3
commit 1a5d0f62d1
3 changed files with 5 additions and 2 deletions
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3
arch/x86/include/asm/apic.h
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@ -48,7 +48,10 @@ static inline void x86_32_probe_apic(void) { }
extern u32 cpuid_to_apicid[];
#define CPU_ACPIID_INVALID U32_MAX
#ifdef CONFIG_X86_LOCAL_APIC
extern int apic_verbosity;
extern int local_apic_timer_c2_ok;

2
arch/x86/kernel/apic/apic.c
View file

@ -111,7 +111,7 @@ static inline bool apic_accessible(void)
* Map cpu index to physical APIC ID
*/
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid, BAD_APICID);
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX);
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, CPU_ACPIID_INVALID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid);

2
arch/x86/xen/enlighten_hvm.c
View file

@ -168,7 +168,7 @@ static int xen_cpu_up_prepare_hvm(unsigned int cpu)
*/
xen_uninit_lock_cpu(cpu);
if (cpu_acpi_id(cpu) != U32_MAX)
if (cpu_acpi_id(cpu) != CPU_ACPIID_INVALID)
per_cpu(xen_vcpu_id, cpu) = cpu_acpi_id(cpu);
else
per_cpu(xen_vcpu_id, cpu) = cpu;