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Diffstat (limited to 'arch/powerpc/lib/sstep.c')
-rw-r--r--arch/powerpc/lib/sstep.c41
1 files changed, 34 insertions, 7 deletions
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index 5abe98216dc2..caee8cc77e19 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -16,6 +16,7 @@
#include <asm/disassemble.h>
extern char system_call_common[];
+extern char system_call_vectored_emulate[];
#ifdef CONFIG_PPC64
/* Bits in SRR1 that are copied from MSR */
@@ -200,8 +201,8 @@ static nokprobe_inline unsigned long mlsd_8lsd_ea(unsigned int instr,
unsigned int dd;
unsigned long ea, d0, d1, d;
- prefix_r = instr & (1ul << 20);
- ra = (suffix >> 16) & 0x1f;
+ prefix_r = GET_PREFIX_R(instr);
+ ra = GET_PREFIX_RA(suffix);
d0 = instr & 0x3ffff;
d1 = suffix & 0xffff;
@@ -1236,6 +1237,9 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
case 17: /* sc */
if ((word & 0xfe2) == 2)
op->type = SYSCALL;
+ else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
+ (word & 0xfe3) == 1)
+ op->type = SYSCALL_VECTORED_0;
else
op->type = UNKNOWN;
return 0;
@@ -1339,8 +1343,8 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
switch (opcode) {
#ifdef __powerpc64__
case 1:
- prefix_r = word & (1ul << 20);
- ra = (suffix >> 16) & 0x1f;
+ prefix_r = GET_PREFIX_R(word);
+ ra = GET_PREFIX_RA(suffix);
rd = (suffix >> 21) & 0x1f;
op->reg = rd;
op->val = regs->gpr[rd];
@@ -1802,7 +1806,18 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
op->val = (int) regs->gpr[ra] /
(int) regs->gpr[rb];
goto arith_done;
-
+#ifdef __powerpc64__
+ case 425: /* divde[.] */
+ asm volatile(PPC_DIVDE(%0, %1, %2) :
+ "=r" (op->val) : "r" (regs->gpr[ra]),
+ "r" (regs->gpr[rb]));
+ goto arith_done;
+ case 393: /* divdeu[.] */
+ asm volatile(PPC_DIVDEU(%0, %1, %2) :
+ "=r" (op->val) : "r" (regs->gpr[ra]),
+ "r" (regs->gpr[rb]));
+ goto arith_done;
+#endif
case 755: /* darn */
if (!cpu_has_feature(CPU_FTR_ARCH_300))
return -1;
@@ -2715,8 +2730,8 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
}
break;
case 1: /* Prefixed instructions */
- prefix_r = word & (1ul << 20);
- ra = (suffix >> 16) & 0x1f;
+ prefix_r = GET_PREFIX_R(word);
+ ra = GET_PREFIX_RA(suffix);
op->update_reg = ra;
rd = (suffix >> 21) & 0x1f;
op->reg = rd;
@@ -3378,6 +3393,18 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr)
regs->msr = MSR_KERNEL;
return 1;
+#ifdef CONFIG_PPC_BOOK3S_64
+ case SYSCALL_VECTORED_0: /* scv 0 */
+ regs->gpr[9] = regs->gpr[13];
+ regs->gpr[10] = MSR_KERNEL;
+ regs->gpr[11] = regs->nip + 4;
+ regs->gpr[12] = regs->msr & MSR_MASK;
+ regs->gpr[13] = (unsigned long) get_paca();
+ regs->nip = (unsigned long) &system_call_vectored_emulate;
+ regs->msr = MSR_KERNEL;
+ return 1;
+#endif
+
case RFI:
return -1;
#endif