diff options
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 9229ba63c..62859ebe0 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -25,7 +25,8 @@ #include <linux/user.h> #include <linux/interrupt.h> #include <linux/init.h> -#include <linux/module.h> +#include <linux/extable.h> +#include <linux/module.h> /* print_modules */ #include <linux/prctl.h> #include <linux/delay.h> #include <linux/kprobes.h> @@ -60,6 +61,8 @@ #include <asm/switch_to.h> #include <asm/tm.h> #include <asm/debug.h> +#include <asm/asm-prototypes.h> +#include <asm/hmi.h> #include <sysdev/fsl_pci.h> #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC) @@ -307,9 +310,13 @@ long hmi_exception_realmode(struct pt_regs *regs) { __this_cpu_inc(irq_stat.hmi_exceptions); + wait_for_subcore_guest_exit(); + if (ppc_md.hmi_exception_early) ppc_md.hmi_exception_early(regs); + wait_for_tb_resync(); + return 0; } @@ -1376,6 +1383,7 @@ void facility_unavailable_exception(struct pt_regs *regs) [FSCR_TM_LG] = "TM", [FSCR_EBB_LG] = "EBB", [FSCR_TAR_LG] = "TAR", + [FSCR_LM_LG] = "LM", }; char *facility = "unknown"; u64 value; @@ -1418,7 +1426,8 @@ void facility_unavailable_exception(struct pt_regs *regs) rd = (instword >> 21) & 0x1f; current->thread.dscr = regs->gpr[rd]; current->thread.dscr_inherit = 1; - mtspr(SPRN_FSCR, value | FSCR_DSCR); + current->thread.fscr |= FSCR_DSCR; + mtspr(SPRN_FSCR, current->thread.fscr); } /* Read from DSCR (mfspr RT, 0x03) */ @@ -1432,6 +1441,14 @@ void facility_unavailable_exception(struct pt_regs *regs) emulate_single_step(regs); } return; + } else if ((status == FSCR_LM_LG) && cpu_has_feature(CPU_FTR_ARCH_300)) { + /* + * This process has touched LM, so turn it on forever + * for this process + */ + current->thread.fscr |= FSCR_LM; + mtspr(SPRN_FSCR, current->thread.fscr); + return; } if ((status < ARRAY_SIZE(facility_strings)) && |