diff options
| author | David S. Miller <davem@davemloft.net> | 2013-06-05 15:56:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-05 16:37:30 -0700 |
| commit | 6bc19fb82d4c05a9eee19d6d2aab2ce26e499ec2 (patch) | |
| tree | 8b049ef383307f5dae91b5c9cf78dbfb9b74a4d1 /arch/powerpc/kernel/traps.c | |
| parent | 11a164a04382d735230b01f4cc46ad78a7c4abf6 (diff) | |
| parent | 4d3797d7e1861ac1af150a6189315786c5e1c820 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Merge 'net' bug fixes into 'net-next' as we have patches
that will build on top of them.
This merge commit includes a change from Emil Goode
(emilgoode@gmail.com) that fixes a warning that would
have been introduced by this merge. Specifically it
fixes the pingv6_ops method ipv6_chk_addr() to add a
"const" to the "struct net_device *dev" argument and
likewise update the dummy_ipv6_chk_addr() declaration.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index a7a648f6b75..f18c79c324e 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -53,6 +53,7 @@ #ifdef CONFIG_PPC64 #include <asm/firmware.h> #include <asm/processor.h> +#include <asm/tm.h> #endif #include <asm/kexec.h> #include <asm/ppc-opcode.h> @@ -932,6 +933,28 @@ static int emulate_isel(struct pt_regs *regs, u32 instword) return 0; } +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +static inline bool tm_abort_check(struct pt_regs *regs, int cause) +{ + /* If we're emulating a load/store in an active transaction, we cannot + * emulate it as the kernel operates in transaction suspended context. + * We need to abort the transaction. This creates a persistent TM + * abort so tell the user what caused it with a new code. + */ + if (MSR_TM_TRANSACTIONAL(regs->msr)) { + tm_enable(); + tm_abort(cause); + return true; + } + return false; +} +#else +static inline bool tm_abort_check(struct pt_regs *regs, int reason) +{ + return false; +} +#endif + static int emulate_instruction(struct pt_regs *regs) { u32 instword; @@ -971,6 +994,9 @@ static int emulate_instruction(struct pt_regs *regs) /* Emulate load/store string insn. */ if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING) { + if (tm_abort_check(regs, + TM_CAUSE_EMULATE | TM_CAUSE_PERSISTENT)) + return -EINVAL; PPC_WARN_EMULATED(string, regs); return emulate_string_inst(regs, instword); } @@ -1148,6 +1174,9 @@ void alignment_exception(struct pt_regs *regs) if (!arch_irq_disabled_regs(regs)) local_irq_enable(); + if (tm_abort_check(regs, TM_CAUSE_ALIGNMENT | TM_CAUSE_PERSISTENT)) + goto bail; + /* we don't implement logging of alignment exceptions */ if (!(current->thread.align_ctl & PR_UNALIGN_SIGBUS)) fixed = fix_alignment(regs); |