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| author |   Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2020-09-02 09:59:44 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-09-15 22:13:20 +1000 |
| commit | fa725cc53d353110f39a9e5b9f60d6acb2c7ff49 (patch) | |
| tree | 486b0e3390d4495dc9e696846c1ac87aa9f8bfd0 /arch/powerpc/kernel/ptrace/ptrace-noadv.c | |
| parent | powerpc/watchpoint: Add hw_len wherever missing (diff) | |
| download | wireguard-linux-fa725cc53d353110f39a9e5b9f60d6acb2c7ff49.tar.xz wireguard-linux-fa725cc53d353110f39a9e5b9f60d6acb2c7ff49.zip | |
powerpc/watchpoint/ptrace: Introduce PPC_DEBUG_FEATURE_DATA_BP_ARCH_31
PPC_DEBUG_FEATURE_DATA_BP_ARCH_31 can be used to determine whether
we are running on an ISA 3.1 compliant machine. Which is needed to
determine DAR behaviour, 512 byte boundary limit etc. This was
requested by Pedro Miraglia Franco de Carvalho for extending
watchpoint features in gdb. Note that availability of 2nd DAWR is
independent of this flag and should be checked using
ppc_debug_info->num_data_bps.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200902042945.129369-8-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/ptrace/ptrace-noadv.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace/ptrace-noadv.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index 48c52426af80..aa36fcad36cd 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -57,6 +57,8 @@ void ppc_gethwdinfo(struct ppc_debug_info *dbginfo) } else { dbginfo->features = 0; } + if (cpu_has_feature(CPU_FTR_ARCH_31)) + dbginfo->features |= PPC_DEBUG_FEATURE_DATA_BP_ARCH_31; } int ptrace_get_debugreg(struct task_struct *child, unsigned long addr, |