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| author | David S. Miller <davem@davemloft.net> | 2008-11-23 21:55:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-04 09:17:02 -0800 |
| commit | b4f4372f96e0573d752d9e45beda02fabf716cc8 (patch) | |
| tree | 641798dfe78c1407908c68b64427cd55cdc18b34 /arch/sparc64/kernel/hvtramp.S | |
| parent | c6afec5e4d323e7b88a7d6e291a5aa021a8fcb7d (diff) | |
| download | lwn-b4f4372f96e0573d752d9e45beda02fabf716cc8.tar.gz lwn-b4f4372f96e0573d752d9e45beda02fabf716cc8.zip | |
sparc64: Make %pil level 15 a pseudo-NMI.
So that we can profile code even in a local_irq_disable() section,
only write 14 (instead of 15) into the %pil register to disable IRQs.
This allows PIL level 15 to serve as a pseudo NMI.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/hvtramp.S')
| -rw-r--r-- | arch/sparc64/kernel/hvtramp.S | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/hvtramp.S b/arch/sparc64/kernel/hvtramp.S index 0236c43772fa..9365432904d6 100644 --- a/arch/sparc64/kernel/hvtramp.S +++ b/arch/sparc64/kernel/hvtramp.S @@ -1,6 +1,6 @@ /* hvtramp.S: Hypervisor start-cpu trampoline code. * - * Copyright (C) 2007 David S. Miller <davem@davemloft.net> + * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> */ #include <linux/init.h> @@ -14,6 +14,7 @@ #include <asm/ptrace.h> #include <asm/head.h> #include <asm/asi.h> +#include <asm/pil.h> __CPUINIT .align 8 @@ -32,7 +33,7 @@ */ hv_cpu_startup: SET_GL(0) - wrpr %g0, 15, %pil + wrpr %g0, PIL_NORMAL_MAX, %pil wrpr %g0, 0, %canrestore wrpr %g0, 0, %otherwin wrpr %g0, 6, %cansave |