diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2022-09-09 15:23:12 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-11-24 23:31:47 +1100 |
| commit | b86cf14f240e002e001fd4f2bf49114c7836fd5c (patch) | |
| tree | 40f979d9e82642c1f7d0a16578f0de5ed2113975 /arch/powerpc/lib | |
| parent | ff8fae94e26f5cd2779ceda0ee6d714a10501abd (diff) | |
| download | linux-b86cf14f240e002e001fd4f2bf49114c7836fd5c.tar.bz2 | |
powerpc: add compile-time support for lbarx, lharx
ISA v2.06 (POWER7 and up) as well as e6500 support lbarx and lharx.
Add a compile option that allows code to use it, and add support in
cmpxchg and xchg 8 and 16 bit values without shifting and masking.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220909052312.63916-1-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/sstep.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index 398b5694aeb7..38158b77a801 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -2284,15 +2284,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, op->type = MKOP(STCX, 0, 4); break; -#ifdef __powerpc64__ - case 84: /* ldarx */ - op->type = MKOP(LARX, 0, 8); - break; - - case 214: /* stdcx. */ - op->type = MKOP(STCX, 0, 8); - break; - +#ifdef CONFIG_PPC_HAS_LBARX_LHARX case 52: /* lbarx */ op->type = MKOP(LARX, 0, 1); break; @@ -2308,6 +2300,15 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, case 726: /* sthcx. */ op->type = MKOP(STCX, 0, 2); break; +#endif +#ifdef __powerpc64__ + case 84: /* ldarx */ + op->type = MKOP(LARX, 0, 8); + break; + + case 214: /* stdcx. */ + op->type = MKOP(STCX, 0, 8); + break; case 276: /* lqarx */ if (!((rd & 1) || rd == ra || rd == rb)) @@ -3334,7 +3335,7 @@ int emulate_loadstore(struct pt_regs *regs, struct instruction_op *op) err = 0; val = 0; switch (size) { -#ifdef __powerpc64__ +#ifdef CONFIG_PPC_HAS_LBARX_LHARX case 1: __get_user_asmx(val, ea, err, "lbarx"); break; |