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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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1
arch/powerpc/include/asm/kvm_book3s_asm.h
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@@ -74,7 +74,6 @@ struct kvmppc_host_state {
ulong vmhandler;
ulong scratch0;
ulong scratch1;
ulong sprg3;
u8 in_guest;
u8 restore_hid5;
u8 napping;

1
arch/powerpc/include/asm/paca.h
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@@ -136,6 +136,7 @@ struct paca_struct {
u8 io_sync; /* writel() needs spin_unlock sync */
u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */
u8 nap_state_lost; /* NV GPR values lost in power7_idle */
u64 sprg3; /* Saved user-visible sprg */
#ifdef CONFIG_PPC_POWERNV
/* Pointer to OPAL machine check event structure set by the