[PATCH 20/21] arm64: tracing: Advertise a mode of EL1t in synthetic kernel regs
COLD21d
From: Will Deacon <will@kernel.org>
Date: 2026-09-07 16:44:29
Also in:
lkml
Subsystem:
arm pmu profiling and debugging, arm64 port (aarch64 architecture), function hooks (ftrace), performance events subsystem, the rest · Maintainers:
Will Deacon, Mark Rutland, Catalin Marinas, Steven Rostedt, Masami Hiramatsu, Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Revision v1 of 2 in this series.
Revisions (2)
- v1 current
- v2 [diff vs current]
When synthesising a kernel regs structure for ftrace or perf, advertise a mode of EL1t to reflect the mode in which the kernel runs for the vast majority of the time. Signed-off-by: Will Deacon <will@kernel.org> --- arch/arm64/include/asm/ftrace.h | 4 ++-- arch/arm64/include/asm/perf_event.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
index 1621c84f44b3..d55a019cdf0a 100644
--- a/arch/arm64/include/asm/ftrace.h
+++ b/arch/arm64/include/asm/ftrace.h@@ -153,7 +153,7 @@ ftrace_partial_regs(const struct ftrace_regs *fregs, struct pt_regs *regs) regs->pc = afregs->pc; regs->regs[29] = afregs->fp; regs->regs[30] = afregs->lr; - regs->pstate = PSR_MODE_EL1h; + regs->pstate = PSR_MODE_EL1t; return regs; }
@@ -161,7 +161,7 @@ ftrace_partial_regs(const struct ftrace_regs *fregs, struct pt_regs *regs) (_regs)->pc = arch_ftrace_regs(fregs)->pc; \ (_regs)->regs[29] = arch_ftrace_regs(fregs)->fp; \ (_regs)->sp = arch_ftrace_regs(fregs)->sp; \ - (_regs)->pstate = PSR_MODE_EL1h; \ + (_regs)->pstate = PSR_MODE_EL1t; \ } while (0) int ftrace_regs_query_register_offset(const char *name);
diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h
index ee45b4e77347..b3e7c24a5aab 100644
--- a/arch/arm64/include/asm/perf_event.h
+++ b/arch/arm64/include/asm/perf_event.h@@ -17,7 +17,7 @@ (regs)->pc = (__ip); \ (regs)->regs[29] = (unsigned long) __builtin_frame_address(0); \ (regs)->sp = current_stack_pointer; \ - (regs)->pstate = PSR_MODE_EL1h; \ + (regs)->pstate = PSR_MODE_EL1t; \ } #endif
--
2.55.0.979.g7e5102b832-goog