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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-21 22:05:35 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:12 +0200 |
| commit | 7c2a57364cae0f2e070a27d728f1df6844ffff56 (patch) | |
| tree | 152432b465046ccf1db0366552a5d9cc1478e581 /arch/x86/kernel/irq.c | |
| parent | 633260fa143bbed05e65dc557a492667dfdc45bb (diff) | |
| download | lwn-7c2a57364cae0f2e070a27d728f1df6844ffff56.tar.gz lwn-7c2a57364cae0f2e070a27d728f1df6844ffff56.zip | |
x86/irq: Rework handle_irq() for 64-bit
To consolidate the interrupt entry/exit code vs. the other exceptions
make handle_irq() an inline and handle both 64-bit and 32-bit mode.
Preparatory change to move irq stack switching for 64-bit to C which allows
to consolidate the entry exit handling by reusing the idtentry machinery
both in ASM and C.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202118.889972748@linutronix.de
Diffstat (limited to 'arch/x86/kernel/irq.c')
| -rw-r--r-- | arch/x86/kernel/irq.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index c7669363251a..5495ea4debba 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -13,6 +13,7 @@ #include <linux/export.h> #include <linux/irq.h> +#include <asm/irq_stack.h> #include <asm/apic.h> #include <asm/io_apic.h> #include <asm/irq.h> @@ -221,6 +222,14 @@ u64 arch_irq_stat(void) return sum; } +static __always_inline void handle_irq(struct irq_desc *desc, + struct pt_regs *regs) +{ + if (IS_ENABLED(CONFIG_X86_64)) + run_on_irqstack_cond(desc->handle_irq, desc, regs); + else + __handle_irq(desc, regs); +} /* * do_IRQ handles all normal device IRQ's (the special @@ -246,7 +255,7 @@ __visible void __irq_entry do_IRQ(struct pt_regs *regs, unsigned long vector) desc = __this_cpu_read(vector_irq[vector]); if (likely(!IS_ERR_OR_NULL(desc))) { if (IS_ENABLED(CONFIG_X86_32)) - handle_irq(desc, regs); + __handle_irq(desc, regs); else generic_handle_irq_desc(desc); } else { |