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| author | Mihai Caraman <mihai.caraman@freescale.com> | 2012-09-06 02:49:44 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-07 09:48:49 +1000 |
| commit | 0127262c01f0beb485f917c720d1d95d165dfdbf (patch) | |
| tree | 8ea17c81f09dec7c6e8bfdc8f3288ec7cfa439c6 | |
| parent | 8b64a9dfb091f1eca8b7e58da82f1e7d1d5fe0ad (diff) | |
| download | blackbird-obmc-linux-0127262c01f0beb485f917c720d1d95d165dfdbf.tar.gz blackbird-obmc-linux-0127262c01f0beb485f917c720d1d95d165dfdbf.zip | |
powerpc: Restore VDSO information on critical exception om BookE
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>
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_asm.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/paca.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64e.S | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vdso.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 2 |
6 files changed, 7 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h index bfcd00c1485d..88609b23b775 100644 --- a/arch/powerpc/include/asm/kvm_book3s_asm.h +++ b/arch/powerpc/include/asm/kvm_book3s_asm.h @@ -74,7 +74,6 @@ struct kvmppc_host_state { ulong vmhandler; ulong scratch0; ulong scratch1; - ulong sprg3; u8 in_guest; u8 restore_hid5; u8 napping; diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index daf813fea91f..7796519fd238 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -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 diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 85b05c463fae..72f26166007a 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -205,6 +205,7 @@ int main(void) DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); DEFINE(PACA_NAPSTATELOST, offsetof(struct paca_struct, nap_state_lost)); + DEFINE(PACA_SPRG3, offsetof(struct paca_struct, sprg3)); #endif /* CONFIG_PPC64 */ /* RTAS */ @@ -533,7 +534,6 @@ int main(void) HSTATE_FIELD(HSTATE_VMHANDLER, vmhandler); HSTATE_FIELD(HSTATE_SCRATCH0, scratch0); HSTATE_FIELD(HSTATE_SCRATCH1, scratch1); - HSTATE_FIELD(HSTATE_SPRG3, sprg3); HSTATE_FIELD(HSTATE_IN_GUEST, in_guest); HSTATE_FIELD(HSTATE_RESTORE_HID5, restore_hid5); HSTATE_FIELD(HSTATE_NAPPING, napping); diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S index 7476b0ae09fb..87a82fbdf05a 100644 --- a/arch/powerpc/kernel/exceptions-64e.S +++ b/arch/powerpc/kernel/exceptions-64e.S @@ -110,7 +110,9 @@ #define PROLOG_STORE_RESTORE_SCRATCH_CRIT \ mfspr r10,SPRN_SPRG_CRIT_SCRATCH; /* get r13 */ \ - std r10,PACA_EXCRIT+EX_R13(r13) + std r10,PACA_EXCRIT+EX_R13(r13); \ + ld r11,PACA_SPRG3(r13); \ + mtspr SPRN_SPRG_CRIT_SCRATCH,r11; /* Variants of the "addition" argument for the prolog */ diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index b67db22e102d..1b2076f049ce 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -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(); diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 5a84c8d3d040..39a21bfb5d4b 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1065,7 +1065,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) mtspr SPRN_DABRX,r6 /* Restore SPRG3 */ - ld r3,HSTATE_SPRG3(r13) + ld r3,PACA_SPRG3(r13) mtspr SPRN_SPRG3,r3 /* |
