diff options
Diffstat (limited to 'arch/powerpc/kernel/vecemu.c')
| -rw-r--r-- | arch/powerpc/kernel/vecemu.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/vecemu.c b/arch/powerpc/kernel/vecemu.c index 2d8f6d8ccafc..fd9432875ebc 100644 --- a/arch/powerpc/kernel/vecemu.c +++ b/arch/powerpc/kernel/vecemu.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Routines to emulate some Altivec/VMX instructions, specifically * those that can trap when given denormalized operands in Java mode. @@ -7,7 +8,9 @@ #include <linux/sched.h> #include <asm/ptrace.h> #include <asm/processor.h> +#include <asm/switch_to.h> #include <linux/uaccess.h> +#include <asm/inst.h> /* Functions in vector.S */ extern void vaddfp(vector128 *dst, vector128 *a, vector128 *b); @@ -258,21 +261,24 @@ static unsigned int rfin(unsigned int x) int emulate_altivec(struct pt_regs *regs) { - unsigned int instr, i; + ppc_inst_t instr; + unsigned int i, word; unsigned int va, vb, vc, vd; vector128 *vrs; - if (get_user(instr, (unsigned int __user *) regs->nip)) + if (get_user_instr(instr, (void __user *)regs->nip)) return -EFAULT; - if ((instr >> 26) != 4) + + word = ppc_inst_val(instr); + if (ppc_inst_primary_opcode(instr) != 4) return -EINVAL; /* not an altivec instruction */ - vd = (instr >> 21) & 0x1f; - va = (instr >> 16) & 0x1f; - vb = (instr >> 11) & 0x1f; - vc = (instr >> 6) & 0x1f; + vd = (word >> 21) & 0x1f; + va = (word >> 16) & 0x1f; + vb = (word >> 11) & 0x1f; + vc = (word >> 6) & 0x1f; vrs = current->thread.vr_state.vr; - switch (instr & 0x3f) { + switch (word & 0x3f) { case 10: switch (vc) { case 0: /* vaddfp */ |