From: Avi Kivity <avi@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] x86: Switch critical exceptions and NMI to irqstack
Date: Thu, 25 Dec 2008 22:58:46 +0200 [thread overview]
Message-ID: <1230238726-17506-4-git-send-email-avi@redhat.com> (raw)
In-Reply-To: <1230238726-17506-1-git-send-email-avi@redhat.com>
With the special exception stacks gone, the irqstack is a much safer place
than the regular task stacks.
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/kernel/entry_64.S | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 245fecd..8f40593 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -917,7 +917,10 @@ END(spurious_interrupt)
movq %rsp,%rdi
movq ORIG_RAX(%rsp),%rsi
movq $-1,ORIG_RAX(%rsp)
+ mov %rsp, %rbp
+ enter_irqstack %rax
call \sym
+ mov %rbp, %rsp
DISABLE_INTERRUPTS(CLBR_NONE)
.if \irqtrace
TRACE_IRQS_OFF
--
1.6.0.6
next prev parent reply other threads:[~2008-12-25 20:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-25 20:58 [PATCH 0/3] Remove interrupt stack table usage from x86_64 kernel Avi Kivity
2008-12-25 20:58 ` [PATCH 1/3] x86: drop the use of the tss interrupt stack table (IST) Avi Kivity
2008-12-25 20:58 ` [PATCH 2/3] x86: Remove pda.irqcount Avi Kivity
2008-12-25 20:58 ` Avi Kivity [this message]
2008-12-26 9:15 ` [PATCH 0/3] Remove interrupt stack table usage from x86_64 kernel Ingo Molnar
[not found] ` <87vdt5vfxc.fsf@basil.nowhere.org>
[not found] ` <4956A0B1.1060908@redhat.com>
[not found] ` <20081227224029.GB496@one.firstfloor.org>
[not found] ` <49573FE7.9090802@redhat.com>
[not found] ` <20081228131605.GC496@one.firstfloor.org>
2008-12-28 14:09 ` Avi Kivity
2008-12-28 19:08 ` Andi Kleen
2008-12-28 19:07 ` Avi Kivity
2008-12-28 19:19 ` Avi Kivity
2008-12-28 20:08 ` Avi Kivity
2008-12-28 20:34 ` Andi Kleen
2008-12-28 20:28 ` Avi Kivity
2008-12-28 19:30 ` Andi Kleen
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