diff options
| author | Paul Mackerras <paulus@ozlabs.org> | 2017-08-30 14:12:34 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-09-01 16:39:53 +1000 |
| commit | e61ccc7b0c413f3937dfd53b72a8ac29b226975f (patch) | |
| tree | ca369c9a9b0f3f6320b480a829d8742a1fd3b07e /arch/powerpc/lib/sstep.c | |
| parent | c22435a5f3d8f85ea162ae523a6ba60a58521ba5 (diff) | |
| download | lwn-e61ccc7b0c413f3937dfd53b72a8ac29b226975f.tar.gz lwn-e61ccc7b0c413f3937dfd53b72a8ac29b226975f.zip | |
powerpc: Emulate vector element load/store instructions
This adds code to analyse_instr() and emulate_step() to handle the
vector element loads and stores:
lvebx, lvehx, lvewx, stvebx, stvehx, stvewx.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/lib/sstep.c')
| -rw-r--r-- | arch/powerpc/lib/sstep.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index c4d6a02a9d1a..0de41f29e0b0 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -476,7 +476,7 @@ static nokprobe_inline int do_vec_load(int rn, unsigned long ea, return -EFAULT; /* align to multiple of size */ ea &= ~(size - 1); - err = copy_mem_in(u.b, ea, size); + err = copy_mem_in(&u.b[ea & 0xf], ea, size); if (err) return err; @@ -508,7 +508,7 @@ static nokprobe_inline int do_vec_store(int rn, unsigned long ea, else u.v = current->thread.vr_state.vr[rn]; preempt_enable(); - return copy_mem_out(u.b, ea, size); + return copy_mem_out(&u.b[ea & 0xf], ea, size); } #endif /* CONFIG_ALTIVEC */ @@ -1807,12 +1807,46 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, break; #ifdef CONFIG_ALTIVEC + /* + * Note: for the load/store vector element instructions, + * bits of the EA say which field of the VMX register to use. + */ + case 7: /* lvebx */ + op->type = MKOP(LOAD_VMX, 0, 1); + op->element_size = 1; + break; + + case 39: /* lvehx */ + op->type = MKOP(LOAD_VMX, 0, 2); + op->element_size = 2; + break; + + case 71: /* lvewx */ + op->type = MKOP(LOAD_VMX, 0, 4); + op->element_size = 4; + break; + case 103: /* lvx */ case 359: /* lvxl */ op->type = MKOP(LOAD_VMX, 0, 16); op->element_size = 16; break; + case 135: /* stvebx */ + op->type = MKOP(STORE_VMX, 0, 1); + op->element_size = 1; + break; + + case 167: /* stvehx */ + op->type = MKOP(STORE_VMX, 0, 2); + op->element_size = 2; + break; + + case 199: /* stvewx */ + op->type = MKOP(STORE_VMX, 0, 4); + op->element_size = 4; + break; + case 231: /* stvx */ case 487: /* stvxl */ op->type = MKOP(STORE_VMX, 0, 16); |