From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Andy Lutomirski <luto@kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>
Subject: [patch V3 29/32] x86/irq/64: Init hardirq_stack_ptr during CPU hotplug
Date: Sun, 14 Apr 2019 18:00:05 +0200 [thread overview]
Message-ID: <20190414160146.177558566@linutronix.de> (raw)
In-Reply-To: 20190414155936.679808307@linutronix.de
Preparatory change for distangling the irq stack union as a prerequisite
for irq stacks with guard pages.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/irq.h | 4 ----
arch/x86/kernel/cpu/common.c | 4 +---
arch/x86/kernel/irq_64.c | 15 +++++++++++++++
3 files changed, 16 insertions(+), 7 deletions(-)
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -16,11 +16,7 @@ static inline int irq_canonicalize(int i
return ((irq == 2) ? 9 : irq);
}
-#ifdef CONFIG_X86_32
extern int irq_init_percpu_irqstack(unsigned int cpu);
-#else
-static inline int irq_init_percpu_irqstack(unsigned int cpu) { return 0; }
-#endif
#define __ARCH_HAS_DO_SOFTIRQ
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1510,9 +1510,7 @@ DEFINE_PER_CPU(struct task_struct *, cur
&init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
-DEFINE_PER_CPU(char *, hardirq_stack_ptr) =
- init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE;
-
+DEFINE_PER_CPU(char *, hardirq_stack_ptr);
DEFINE_PER_CPU(unsigned int, irq_count) __visible = -1;
DEFINE_PER_CPU(int, __preempt_count) = INIT_PREEMPT_COUNT;
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -87,3 +87,18 @@ bool handle_irq(struct irq_desc *desc, s
generic_handle_irq_desc(desc);
return true;
}
+
+static int map_irq_stack(unsigned int cpu)
+{
+ void *va = per_cpu_ptr(irq_stack_union.irq_stack, cpu);
+
+ per_cpu(hardirq_stack_ptr, cpu) = va + IRQ_STACK_SIZE;
+ return 0;
+}
+
+int irq_init_percpu_irqstack(unsigned int cpu)
+{
+ if (per_cpu(hardirq_stack_ptr, cpu))
+ return 0;
+ return map_irq_stack(cpu);
+}
next prev parent reply other threads:[~2019-04-14 16:03 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-14 15:59 [patch V3 00/32] x86: Add guard pages to exception and interrupt stacks Thomas Gleixner
2019-04-14 15:59 ` [patch V3 01/32] mm/slab: Fix broken stack trace storage Thomas Gleixner
2019-04-14 16:16 ` Andy Lutomirski
2019-04-14 16:34 ` Thomas Gleixner
2019-04-15 9:02 ` [patch V4 " Thomas Gleixner
2019-04-15 13:23 ` Josh Poimboeuf
2019-04-15 16:07 ` Thomas Gleixner
2019-04-15 16:16 ` Josh Poimboeuf
2019-04-15 17:05 ` Andy Lutomirski
2019-04-15 21:22 ` Thomas Gleixner
2019-04-16 11:37 ` Vlastimil Babka
2019-04-16 14:10 ` [patch V5 01/32] mm/slab: Remove " Thomas Gleixner
2019-04-16 15:16 ` Vlastimil Babka
2019-04-15 21:20 ` [patch V4 01/32] mm/slab: Fix " Thomas Gleixner
2019-04-15 16:21 ` Peter Zijlstra
2019-04-15 16:58 ` [patch V3 " Andy Lutomirski
2019-04-14 15:59 ` [patch V3 02/32] x86/irq/64: Limit IST stack overflow check to #DB stack Thomas Gleixner
2019-04-17 14:02 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 03/32] x86/dumpstack: Fix off-by-one errors in stack identification Thomas Gleixner
2019-04-17 14:03 ` [tip:x86/irq] " tip-bot for Andy Lutomirski
2019-04-14 15:59 ` [patch V3 04/32] x86/irq/64: Remove a hardcoded irq_stack_union access Thomas Gleixner
2019-04-17 14:03 ` [tip:x86/irq] " tip-bot for Andy Lutomirski
2019-04-14 15:59 ` [patch V3 05/32] x86/irq/64: Sanitize the top/bottom confusion Thomas Gleixner
2019-04-17 14:04 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 06/32] x86/idt: Remove unused macro SISTG Thomas Gleixner
2019-04-17 14:05 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 07/32] x86/64: Remove stale CURRENT_MASK Thomas Gleixner
2019-04-17 14:06 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 08/32] x86/exceptions: Remove unused stack defines on 32bit Thomas Gleixner
2019-04-17 14:06 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 09/32] x86/exceptions: Make IST index zero based Thomas Gleixner
2019-04-17 14:07 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 10/32] x86/cpu_entry_area: Cleanup setup functions Thomas Gleixner
2019-04-17 14:08 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 11/32] x86/exceptions: Add structs for exception stacks Thomas Gleixner
2019-04-16 18:20 ` Sean Christopherson
2019-04-17 14:08 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 12/32] x86/cpu_entry_area: Prepare for IST guard pages Thomas Gleixner
2019-04-17 14:09 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 13/32] x86/cpu_entry_area: Provide exception stack accessor Thomas Gleixner
2019-04-17 14:10 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 14/32] x86/traps: Use cpu_entry_area instead of orig_ist Thomas Gleixner
2019-04-17 14:10 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 15/32] x86/irq/64: Use cpu entry area " Thomas Gleixner
2019-04-17 14:11 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 16/32] x86/dumpstack/64: Use cpu_entry_area " Thomas Gleixner
2019-04-17 14:12 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 17/32] x86/cpu: Prepare TSS.IST setup for guard pages Thomas Gleixner
2019-04-17 14:13 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 18/32] x86/cpu: Remove orig_ist array Thomas Gleixner
2019-04-17 14:13 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 19/32] x86/exceptions: Disconnect IST index and stack order Thomas Gleixner
2019-04-17 14:14 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 20/32] x86/exceptions: Enable IST guard pages Thomas Gleixner
2019-04-17 14:15 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 21/32] x86/exceptions: Split debug IST stack Thomas Gleixner
2019-04-16 22:07 ` Sean Christopherson
2019-04-17 14:15 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 22/32] x86/dumpstack/64: Speedup in_exception_stack() Thomas Gleixner
2019-04-17 14:16 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 15:59 ` [patch V3 23/32] x86/irq/32: Define IRQ_STACK_SIZE Thomas Gleixner
2019-04-17 14:17 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 24/32] x86/irq/32: Make irq stack a character array Thomas Gleixner
2019-04-17 14:18 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 25/32] x86/irq/32: Rename hard/softirq_stack to hard/softirq_stack_ptr Thomas Gleixner
2019-04-17 14:18 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 26/32] x86/irq/64: Rename irq_stack_ptr to hardirq_stack_ptr Thomas Gleixner
2019-04-17 14:19 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 27/32] x86/irq/32: Invoke irq_ctx_init() from init_IRQ() Thomas Gleixner
2019-04-17 14:20 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 28/32] x86/irq/32: Handle irq stack allocation failure proper Thomas Gleixner
2019-04-17 14:20 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
2019-04-14 16:00 ` Thomas Gleixner [this message]
2019-04-17 14:21 ` [tip:x86/irq] x86/irq/64: Init hardirq_stack_ptr during CPU hotplug tip-bot for Thomas Gleixner
2019-04-14 16:00 ` [patch V3 30/32] x86/irq/64: Split the IRQ stack into its own pages Thomas Gleixner
2019-04-17 14:22 ` [tip:x86/irq] " tip-bot for Andy Lutomirski
2019-04-14 16:00 ` [patch V3 31/32] x86/irq/64: Remap the IRQ stack with guard pages Thomas Gleixner
2019-04-17 14:22 ` [tip:x86/irq] " tip-bot for Andy Lutomirski
2019-04-14 16:00 ` [patch V3 32/32] x86/irq/64: Remove stack overflow debug code Thomas Gleixner
2019-04-17 14:23 ` [tip:x86/irq] " tip-bot for Thomas Gleixner
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