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authorRavi Bangoria <ravi.bangoria@linux.ibm.com>2020-09-02 09:59:44 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2020-09-15 22:13:20 +1000
commitfa725cc53d353110f39a9e5b9f60d6acb2c7ff49 (patch)
tree486b0e3390d4495dc9e696846c1ac87aa9f8bfd0 /Documentation/powerpc
parent58da5984d2ea6d95f3f9d9e8dd9f7e1b0dddfb3c (diff)
downloadlwn-fa725cc53d353110f39a9e5b9f60d6acb2c7ff49.tar.gz
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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 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/ptrace.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/powerpc/ptrace.rst b/Documentation/powerpc/ptrace.rst
index 864d4b6dddd1..77725d69eb4a 100644
--- a/Documentation/powerpc/ptrace.rst
+++ b/Documentation/powerpc/ptrace.rst
@@ -46,6 +46,7 @@ features will have bits indicating whether there is support for::
#define PPC_DEBUG_FEATURE_DATA_BP_RANGE 0x4
#define PPC_DEBUG_FEATURE_DATA_BP_MASK 0x8
#define PPC_DEBUG_FEATURE_DATA_BP_DAWR 0x10
+ #define PPC_DEBUG_FEATURE_DATA_BP_ARCH_31 0x20
2. PTRACE_SETHWDEBUG