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| author | Meijing Zhao <zhaomeijing@lixiang.com> | 2026-09-02 14:45:09 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-08 22:54:29 -0700 |
| commit | a971ac3a0af7cbc6c4980cdd41d6574bb694ee79 (patch) | |
| tree | 5a07df398909bf57ac9a4b8d9fb45e38950d135a /include | |
| parent | 4c770a1ca293b56d77d6375d534f128b7fc9b774 (diff) | |
| download | linux-next-a971ac3a0af7cbc6c4980cdd41d6574bb694ee79.tar.gz linux-next-a971ac3a0af7cbc6c4980cdd41d6574bb694ee79.zip | |
mm: trace: decode MTE and shadow stack VMA flags
show_vma_flags(), which is used by VMA tracepoints and %pGv, leaves
architecture-specific HIGH_ARCH_* bits unnamed. Arm64 MTE flags and user
shadow stack flags are therefore printed as raw hexadecimal values.
These bit positions are shared between architectures. For example, bit 37
represents VM_MTE_ALLOWED on arm64 but VM_SHADOW_STACK on x86, so a shared
HIGH_ARCH_* bit cannot be given an unconditional name.
Add conditionally compiled names for VM_MTE, VM_MTE_ALLOWED and
VM_SHADOW_STACK. Keep the configuration guards aligned with the
definitions of these aliases so each shared bit position is decoded
according to the target architecture.
For example, an arm64 VMA containing VM_MTE_ALLOWED is now printed as:
...|account|mte_allowed|...
instead of:
...|account|0x2000000000
Link: https://lore.kernel.org/1c7f7003cff8d00209baa8498f1efee113f5b5a4.1788330432.git.zhaomeijing@lixiang.com
Signed-off-by: Meijing Zhao <zhaomeijing@lixiang.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/trace/events/mmflags.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index 02caeaf359ab..2f980d20a9f6 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -202,6 +202,19 @@ IF_HAVE_PG_ARCH_3(arch_3) # define IF_HAVE_VM_DROPPABLE(flag, name) #endif +#ifdef CONFIG_ARM64_MTE +# define IF_HAVE_VM_MTE(flag, name) {flag, name}, +#else +# define IF_HAVE_VM_MTE(flag, name) +#endif + +#if defined(CONFIG_X86_USER_SHADOW_STACK) || defined(CONFIG_RISCV_USER_CFI) || \ + defined(CONFIG_ARM64_GCS) +# define IF_HAVE_VM_SHADOW_STACK(flag, name) {flag, name}, +#else +# define IF_HAVE_VM_SHADOW_STACK(flag, name) +#endif + #define __def_vmaflag_names \ {VM_READ, "read" }, \ {VM_WRITE, "write" }, \ @@ -237,6 +250,9 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ {VM_HUGEPAGE, "hugepage" }, \ {VM_NOHUGEPAGE, "nohugepage" }, \ IF_HAVE_VM_DROPPABLE(VM_DROPPABLE, "droppable" ) \ +IF_HAVE_VM_MTE(VM_MTE, "mte") \ +IF_HAVE_VM_MTE(VM_MTE_ALLOWED, "mte_allowed") \ +IF_HAVE_VM_SHADOW_STACK(VM_SHADOW_STACK, "shadow_stack") \ {VM_MERGEABLE, "mergeable" } \ #define show_vma_flags(flags) \ |