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| author | Ingo Molnar <mingo@kernel.org> | 2021-03-21 22:16:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2021-03-21 22:16:08 +0100 |
| commit | ca8778c45e401067cefe2abbfb8b547c30d45908 (patch) | |
| tree | c10beaf40adb2bbc6a8933f87ff9da7a5366bf42 /arch/x86/kernel/apic | |
| parent | 21d6a7dcbfba5e7b31f4e9d555a9be362578bfc3 (diff) | |
| parent | 2c41fab1c60b02626c8153a1806a7a1e5d62aaf1 (diff) | |
| download | linux-ca8778c45e401067cefe2abbfb8b547c30d45908.tar.gz linux-ca8778c45e401067cefe2abbfb8b547c30d45908.tar.bz2 linux-ca8778c45e401067cefe2abbfb8b547c30d45908.zip | |
Merge branch 'linus' into x86/cleanups, to resolve conflict
Conflicts:
arch/x86/kernel/kprobes/ftrace.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 0a56bc7626ad..4a39fb429f15 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2342,6 +2342,11 @@ static int cpuid_to_apicid[] = { [0 ... NR_CPUS - 1] = -1, }; +bool arch_match_cpu_phys_id(int cpu, u64 phys_id) +{ + return phys_id == cpuid_to_apicid[cpu]; +} + #ifdef CONFIG_SMP /** * apic_id_is_primary_thread - Check whether APIC ID belongs to a primary thread diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index e90cbd6bdb66..d5c691a3208b 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1032,6 +1032,16 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin, if (idx >= 0 && test_bit(mp_irqs[idx].srcbus, mp_bus_not_pci)) { irq = mp_irqs[idx].srcbusirq; legacy = mp_is_legacy_irq(irq); + /* + * IRQ2 is unusable for historical reasons on systems which + * have a legacy PIC. See the comment vs. IRQ2 further down. + * + * If this gets removed at some point then the related code + * in lapic_assign_system_vectors() needs to be adjusted as + * well. + */ + if (legacy && irq == PIC_CASCADE_IR) + return -EINVAL; } mutex_lock(&ioapic_mutex); |