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powerpc: Restore VDSO information on critical exception om BookE

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Critical exception on 64-bit booke uses user-visible SPRG3 as scratch.
Restore VDSO information in SPRG3 on exception prolog.

Use a common sprg3 field in PACA for all powerpc64 architectures.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Mihai Caraman
2012-09-06 02:49:44 +00:00
committed by Benjamin Herrenschmidt
parent 8b64a9dfb0
commit 0127262c01
6 changed files with 7 additions and 7 deletions
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4
arch/powerpc/kernel/vdso.c
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@@ -723,9 +723,7 @@ int __cpuinit vdso_getcpu_init(void)
val = (cpu & 0xfff) | ((node & 0xffff) << 16);
mtspr(SPRN_SPRG3, val);
#ifdef CONFIG_KVM_BOOK3S_HANDLER
get_paca()->kvm_hstate.sprg3 = val;
#endif
get_paca()->sprg3 = val;
put_cpu();