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mm: trace: decode arm64 and sparc64 VM_ARCH_1 flags

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Patch series "mm: trace: decode architecture-specific VMA flags", v2.

show_vma_flags(), which is used by VMA tracepoints and %pGv, names generic
VM_* bits but does not fully decode architecture-specific flag positions. 
As a result, trace output and VMA dumps can show a generic "arch_1" name
or a raw hexadecimal value instead of the meaning assigned by the target
architecture.

This series adds symbolic names for the arm64 and sparc64 meanings of
VM_ARCH_1, arm64 MTE flags, user shadow stack flags, and protection-key
encoding bits under their corresponding configuration guards.


This patch (of 3):

The VM_ARCH_1 bit has architecture-specific meanings.  show_vma_flags(),
which is used by VMA tracepoints and %pGv, already reports the powerpc,
parisc and no-MMU meanings, but falls back to the generic "arch_1" name on
arm64 and sparc64.

Report VM_ARM64_BTI as "bti" and VM_SPARC_ADI as "adi" so trace output and
%pGv dumps expose the actual architecture-specific state.

Link: https://lore.kernel.org/cover.1788330432.git.zhaomeijing@lixiang.com
Link: https://lore.kernel.org/bcf0fea58240c4b6daa253739683ed7709e42fbb.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>
This commit is contained in:
Meijing Zhao 2026-09-02 14:45:08 +08:00 committed by Andrew Morton
parent fbd3c33ced
commit 4c770a1ca2
1 changed files with 4 additions and 0 deletions
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4
include/trace/events/mmflags.h
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@ -168,6 +168,10 @@ IF_HAVE_PG_ARCH_3(arch_3)
#define __VM_ARCH_SPECIFIC_1 {VM_SAO, "sao" }
#elif defined(CONFIG_PARISC)
#define __VM_ARCH_SPECIFIC_1 {VM_GROWSUP, "growsup" }
#elif defined(CONFIG_SPARC64)
#define __VM_ARCH_SPECIFIC_1 {VM_SPARC_ADI, "adi" }
#elif defined(CONFIG_ARM64)
#define __VM_ARCH_SPECIFIC_1 {VM_ARM64_BTI, "bti" }
#elif !defined(CONFIG_MMU)
#define __VM_ARCH_SPECIFIC_1 {VM_MAPPED_COPY,"mappedcopy" }
#else