diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
| commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
| tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /arch/powerpc/kernel/align.c | |
| parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) | |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'arch/powerpc/kernel/align.c')
| -rw-r--r-- | arch/powerpc/kernel/align.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index 8e7cb8e2b..033f3385f 100644 --- a/arch/powerpc/kernel/align.c +++ b/arch/powerpc/kernel/align.c @@ -26,6 +26,7 @@ #include <asm/emulated_ops.h> #include <asm/switch_to.h> #include <asm/disassemble.h> +#include <asm/cpu_has_feature.h> struct aligninfo { unsigned char len; @@ -228,9 +229,7 @@ static int emulate_dcbz(struct pt_regs *regs, unsigned char __user *addr) #else #define REG_BYTE(rp, i) *((u8 *)(rp) + (i)) #endif -#endif - -#ifdef __LITTLE_ENDIAN__ +#else #define REG_BYTE(rp, i) (*(((u8 *)((rp) + ((i)>>2)) + ((i)&3)))) #endif @@ -875,6 +874,20 @@ int fix_alignment(struct pt_regs *regs) return emulate_vsx(addr, reg, areg, regs, flags, nb, elsize); } #endif + + /* + * ISA 3.0 (such as P9) copy, copy_first, paste and paste_last alignment + * check. + * + * Send a SIGBUS to the process that caused the fault. + * + * We do not emulate these because paste may contain additional metadata + * when pasting to a co-processor. Furthermore, paste_last is the + * synchronisation point for preceding copy/paste sequences. + */ + if ((instruction & 0xfc0006fe) == PPC_INST_COPY) + return -EIO; + /* A size of 0 indicates an instruction we don't support, with * the exception of DCBZ which is handled as a special case here */ |