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x86/apic changes for v6.19:

Browse Source 
- x86/apic: Fix the frequency in apic=verbose log output (Julian Stecklina)
 
   - Simplify mp_irqdomain_alloc() slightly (Christophe JAILLET)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-apic-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 apic updates from Ingo Molnar:

 - x86/apic: Fix the frequency in apic=verbose log output (Julian
   Stecklina)

 - Simplify mp_irqdomain_alloc() slightly (Christophe JAILLET)

* tag 'x86-apic-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic: Fix frequency in apic=verbose log output
  x86/ioapic: Simplify mp_irqdomain_alloc() slightly
This commit is contained in:
Linus Torvalds 2025-12-01 21:26:35 -08:00
commit de2f75d55e
2 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86/kernel/apic/apic.c
View File

@ -173,6 +173,7 @@ static struct resource lapic_resource = {
.flags = IORESOURCE_MEM | IORESOURCE_BUSY,
};
/* Measured in ticks per HZ. */
unsigned int lapic_timer_period = 0;
static void apic_pm_activate(void);
@ -792,6 +793,7 @@ static int __init calibrate_APIC_clock(void)
{
struct clock_event_device *levt = this_cpu_ptr(&lapic_events);
u64 tsc_perj = 0, tsc_start = 0;
long delta_tsc_khz, bus_khz;
unsigned long jif_start;
unsigned long deltaj;
long delta, deltatsc;
@ -894,14 +896,15 @@ static int __init calibrate_APIC_clock(void)
apic_pr_verbose("..... calibration result: %u\n", lapic_timer_period);
if (boot_cpu_has(X86_FEATURE_TSC)) {
apic_pr_verbose("..... CPU clock speed is %ld.%04ld MHz.\n",
(deltatsc / LAPIC_CAL_LOOPS) / (1000000 / HZ),
(deltatsc / LAPIC_CAL_LOOPS) % (1000000 / HZ));
delta_tsc_khz = (deltatsc * HZ) / (1000 * LAPIC_CAL_LOOPS);
apic_pr_verbose("..... CPU clock speed is %ld.%03ld MHz.\n",
delta_tsc_khz / 1000, delta_tsc_khz % 1000);
}
apic_pr_verbose("..... host bus clock speed is %u.%04u MHz.\n",
lapic_timer_period / (1000000 / HZ),
lapic_timer_period % (1000000 / HZ));
bus_khz = (long)lapic_timer_period * HZ / 1000;
apic_pr_verbose("..... host bus clock speed is %ld.%03ld MHz.\n",
bus_khz / 1000, bus_khz % 1000);
/*
* Do a sanity check on the APIC calibration result

2
arch/x86/kernel/apic/io_apic.c
View File

@ -2864,7 +2864,7 @@ int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
ioapic = mp_irqdomain_ioapic_idx(domain);
pin = info->ioapic.pin;
if (irq_find_mapping(domain, (irq_hw_number_t)pin) > 0)
if (irq_resolve_mapping(domain, (irq_hw_number_t)pin))
return -EEXIST;
data = kzalloc(sizeof(*data), GFP_KERNEL);