diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-27 07:03:30 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-27 07:03:30 +0200 |
| commit | 3f1f4311881b330a7b5429dd101e676df191b159 (patch) | |
| tree | a2533df8b157a7006c8c0cb2f89de32820135e50 /arch/powerpc/kernel/traps.c | |
| parent | powerpc/pseries: Child nodes are not detached by dlpar_detach_node (diff) | |
| parent | powerpc/tm: Fix context switching TAR, PPR and DSCR SPRs (diff) | |
| download | linux-3f1f4311881b330a7b5429dd101e676df191b159.tar.xz linux-3f1f4311881b330a7b5429dd101e676df191b159.zip | |
Merge branch 'merge' into next
Merge stuff that already went into Linus via "merge" which
are pre-reqs for subsequent patches
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 58 |
1 files changed, 34 insertions, 24 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 77a7581dcb1c..529a9329e8d9 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -44,9 +44,7 @@ #include <asm/machdep.h> #include <asm/rtas.h> #include <asm/pmc.h> -#ifdef CONFIG_PPC32 #include <asm/reg.h> -#endif #ifdef CONFIG_PMAC_BACKLIGHT #include <asm/backlight.h> #endif @@ -1316,43 +1314,54 @@ void vsx_unavailable_exception(struct pt_regs *regs) die("Unrecoverable VSX Unavailable Exception", regs, SIGABRT); } +#ifdef CONFIG_PPC64 void facility_unavailable_exception(struct pt_regs *regs) { static char *facility_strings[] = { - "FPU", - "VMX/VSX", - "DSCR", - "PMU SPRs", - "BHRB", - "TM", - "AT", - "EBB", - "TAR", + [FSCR_FP_LG] = "FPU", + [FSCR_VECVSX_LG] = "VMX/VSX", + [FSCR_DSCR_LG] = "DSCR", + [FSCR_PM_LG] = "PMU SPRs", + [FSCR_BHRB_LG] = "BHRB", + [FSCR_TM_LG] = "TM", + [FSCR_EBB_LG] = "EBB", + [FSCR_TAR_LG] = "TAR", }; - char *facility, *prefix; + char *facility = "unknown"; u64 value; + u8 status; + bool hv; - if (regs->trap == 0xf60) { - value = mfspr(SPRN_FSCR); - prefix = ""; - } else { + hv = (regs->trap == 0xf80); + if (hv) value = mfspr(SPRN_HFSCR); - prefix = "Hypervisor "; + else + value = mfspr(SPRN_FSCR); + + status = value >> 56; + if (status == FSCR_DSCR_LG) { + /* User is acessing the DSCR. Set the inherit bit and allow + * the user to set it directly in future by setting via the + * H/FSCR DSCR bit. + */ + current->thread.dscr_inherit = 1; + if (hv) + mtspr(SPRN_HFSCR, value | HFSCR_DSCR); + else + mtspr(SPRN_FSCR, value | FSCR_DSCR); + return; } - value = value >> 56; + if ((status < ARRAY_SIZE(facility_strings)) && + facility_strings[status]) + facility = facility_strings[status]; /* We restore the interrupt state now */ if (!arch_irq_disabled_regs(regs)) local_irq_enable(); - if (value < ARRAY_SIZE(facility_strings)) - facility = facility_strings[value]; - else - facility = "unknown"; - pr_err("%sFacility '%s' unavailable, exception at 0x%lx, MSR=%lx\n", - prefix, facility, regs->nip, regs->msr); + hv ? "Hypervisor " : "", facility, regs->nip, regs->msr); if (user_mode(regs)) { _exception(SIGILL, regs, ILL_ILLOPC, regs->nip); @@ -1361,6 +1370,7 @@ void facility_unavailable_exception(struct pt_regs *regs) die("Unexpected facility unavailable exception", regs, SIGABRT); } +#endif #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |