From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Matt Redfearn <matt.redfearn@imgtec.com>,
"Jason A. Donenfeld" <jason@zx2c4.com>,
Thomas Gleixner <tglx@linutronix.de>,
Paolo Bonzini <pbonzini@redhat.com>,
Chris Metcalf <cmetcalf@mellanox.com>,
Petr Mladek <pmladek@suse.com>,
James Hogan <james.hogan@imgtec.com>,
Paul Burton <paul.burton@imgtec.com>,
Aaron Tomlin <atomlin@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mips@linux-mips.org, Ralf Baechle <ralf@linux-mips.org>,
Amit Pundir <amit.pundir@linaro.org>
Subject: [PATCH 4.9 16/31] MIPS: Introduce irq_stack
Date: Sun, 16 Apr 2017 10:04:07 +0200 [thread overview]
Message-ID: <20170416080222.615868993@linuxfoundation.org> (raw)
In-Reply-To: <20170416080221.808058771@linuxfoundation.org>
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Matt Redfearn <matt.redfearn@imgtec.com>
commit fe8bd18ffea5327344d4ec2bf11f47951212abd0 upstream.
Allocate a per-cpu irq stack for use within interrupt handlers.
Also add a utility function on_irq_stack to determine if a given stack
pointer is within the irq stack for that cpu.
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Acked-by: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14740/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/include/asm/irq.h | 12 ++++++++++++
arch/mips/kernel/asm-offsets.c | 1 +
arch/mips/kernel/irq.c | 11 +++++++++++
3 files changed, 24 insertions(+)
--- a/arch/mips/include/asm/irq.h
+++ b/arch/mips/include/asm/irq.h
@@ -17,6 +17,18 @@
#include <irq.h>
+#define IRQ_STACK_SIZE THREAD_SIZE
+
+extern void *irq_stack[NR_CPUS];
+
+static inline bool on_irq_stack(int cpu, unsigned long sp)
+{
+ unsigned long low = (unsigned long)irq_stack[cpu];
+ unsigned long high = low + IRQ_STACK_SIZE;
+
+ return (low <= sp && sp <= high);
+}
+
#ifdef CONFIG_I8259
static inline int irq_canonicalize(int irq)
{
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -102,6 +102,7 @@ void output_thread_info_defines(void)
OFFSET(TI_REGS, thread_info, regs);
DEFINE(_THREAD_SIZE, THREAD_SIZE);
DEFINE(_THREAD_MASK, THREAD_MASK);
+ DEFINE(_IRQ_STACK_SIZE, IRQ_STACK_SIZE);
BLANK();
}
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -25,6 +25,8 @@
#include <linux/atomic.h>
#include <asm/uaccess.h>
+void *irq_stack[NR_CPUS];
+
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
* each architecture has to answer this themselves.
@@ -58,6 +60,15 @@ void __init init_IRQ(void)
clear_c0_status(ST0_IM);
arch_init_irq();
+
+ for_each_possible_cpu(i) {
+ int irq_pages = IRQ_STACK_SIZE / PAGE_SIZE;
+ void *s = (void *)__get_free_pages(GFP_KERNEL, irq_pages);
+
+ irq_stack[i] = s;
+ pr_debug("CPU%d IRQ stack at 0x%p - 0x%p\n", i,
+ irq_stack[i], irq_stack[i] + IRQ_STACK_SIZE);
+ }
}
#ifdef CONFIG_DEBUG_STACKOVERFLOW
next prev parent reply other threads:[~2017-04-16 8:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-16 8:03 [PATCH 4.9 00/31] 4.9.23-stable review Greg Kroah-Hartman
2017-04-16 8:03 ` [PATCH 4.9 05/31] drm/i915: Drop support for I915_EXEC_CONSTANTS_* execbuf parameters Greg Kroah-Hartman
2017-04-16 8:03 ` [PATCH 4.9 06/31] drm/i915: Stop using RP_DOWN_EI on Baytrail Greg Kroah-Hartman
2017-04-16 8:03 ` [PATCH 4.9 07/31] drm/i915: Avoid rcu_barrier() from reclaim paths (shrinker) Greg Kroah-Hartman
2017-04-16 8:03 ` [PATCH 4.9 08/31] orangefs: fix memory leak of string new on exit path Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 09/31] orangefs: Dan Carpenter influenced cleanups Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 10/31] orangefs: fix buffer size mis-match between kernel space and user space Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 12/31] rt2x00usb: fix anchor initialization Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 13/31] rt2x00usb: do not anchor rx and tx urbs Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 14/31] rt2x00: Fix incorrect usage of CONFIG_RT2X00_LIB_USB Greg Kroah-Hartman
2017-04-16 8:04 ` Greg Kroah-Hartman [this message]
2017-04-16 8:04 ` [PATCH 4.9 17/31] MIPS: Stack unwinding while on IRQ stack Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 18/31] MIPS: Only change $28 to thread_info if coming from user mode Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 19/31] MIPS: Switch to the irq_stack in interrupts Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 20/31] MIPS: Select HAVE_IRQ_EXIT_ON_IRQ_STACK Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 21/31] MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 24/31] [PATCH] Revert "drm/i915/execlists: Reset RING registers upon resume" Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 25/31] net/packet: fix overflow in check for priv area size Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 26/31] blk-mq: Avoid memory reclaim when remapping queues Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 27/31] usb: hub: Wait for connection to be reestablished after port reset Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 28/31] net/mlx4_en: Fix bad WQE issue Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 29/31] net/mlx4_core: Fix racy CQ (Completion Queue) free Greg Kroah-Hartman
2017-04-16 8:04 ` [PATCH 4.9 30/31] net/mlx4_core: Fix when to save some qp context flags for dynamic VST to VGT transitions Greg Kroah-Hartman
2017-04-16 21:29 ` [PATCH 4.9 00/31] 4.9.23-stable review Guenter Roeck
2017-04-17 18:21 ` Shuah Khan
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