diff options
| -rw-r--r-- | arch/powerpc/kernel/process.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 99550d3615c..96e31de89b4 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -409,7 +409,7 @@ static inline int set_dabr(struct arch_hw_breakpoint *brk) static inline int set_dawr(struct arch_hw_breakpoint *brk) { - unsigned long dawr, dawrx; + unsigned long dawr, dawrx, mrd; dawr = brk->address; @@ -419,6 +419,14 @@ static inline int set_dawr(struct arch_hw_breakpoint *brk) << (63 - 59); //* translate */ dawrx |= (brk->type & (HW_BRK_TYPE_PRIV_ALL)) \ >> 3; //* PRIM bits */ + /* dawr length is stored in field MDR bits 48:53. Matches range in + doublewords (64 bits) baised by -1 eg. 0b000000=1DW and + 0b111111=64DW. + brk->len is in bytes. + This aligns up to double word size, shifts and does the bias. + */ + mrd = ((brk->len + 7) >> 3) - 1; + dawrx |= (mrd & 0x3f) << (63 - 53); if (ppc_md.set_dawr) return ppc_md.set_dawr(dawr, dawrx); |