| Message ID | bab784a6c44ec5aaa38b56f21f750e911ca62304.1550817743.git.sandipan@linux.ibm.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | a23987ef267a3549667fed5d69c0174e7fc15910 |
| Headers | show |
| Series | powerpc: sstep: Extend instruction emulation support | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | next/apply_patch Successfully applied |
| snowpatch_ozlabs/checkpatch | warning | total: 0 errors, 0 warnings, 3 checks, 28 lines checked |
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index 67e69ebd6c00..ab575e02f9b8 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -1728,6 +1728,28 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, (int) regs->gpr[rb]; goto arith_done; + case 755: /* darn */ + if (!cpu_has_feature(CPU_FTR_ARCH_300)) + return -1; + switch (ra & 0x3) { + case 0: + /* 32-bit conditioned */ + asm volatile(PPC_DARN(%0, 0) : "=r" (op->val)); + goto compute_done; + + case 1: + /* 64-bit conditioned */ + asm volatile(PPC_DARN(%0, 1) : "=r" (op->val)); + goto compute_done; + + case 2: + /* 64-bit raw */ + asm volatile(PPC_DARN(%0, 2) : "=r" (op->val)); + goto compute_done; + } + + return -1; + /* * Logical instructions
This adds emulation support for the following integer instructions: * Deliver A Random Number (darn) As suggested by Michael, this uses a raw .long for specifying the instruction word when using inline assembly to retain compatibility with older binutils. Signed-off-by: Sandipan Das <sandipan@linux.ibm.com> --- arch/powerpc/lib/sstep.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)