From: Steven Rostedt <rostedt@goodmis.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Daniel Gomez <da.gomez@samsung.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Petr Pavlu <petr.pavlu@suse.com>,
Sami Tolvanen <samitolvanen@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Yann Ylavic <ylavic.dev@gmail.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-modules@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH v3 8/8] x86/ftrace: enable EXECMEM_ROX_CACHE for ftrace allocations
Date: Mon, 14 Jul 2025 12:22:43 -0400 [thread overview]
Message-ID: <20250714122243.19c9ab59@batman.local.home> (raw)
In-Reply-To: <20250713071730.4117334-9-rppt@kernel.org>
On Sun, 13 Jul 2025 10:17:30 +0300
Mike Rapoport <rppt@kernel.org> wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
>
> For the most part ftrace uses text poking and can handle ROX memory.
> The only place that requires writable memory is create_trampoline() that
> updates the allocated memory and in the end makes it ROX.
>
> Use execmem_alloc_rw() in x86::ftrace::alloc_tramp() and enable ROX cache
> for EXECMEM_FTRACE when configuration and CPU features allow that.
>
> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
-- Steve
next prev parent reply other threads:[~2025-07-14 16:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-13 7:17 [PATCH v3 0/8] x86: enable EXECMEM_ROX_CACHE for ftrace and kprobes Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 1/8] execmem: drop unused execmem_update_copy() Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 2/8] execmem: introduce execmem_alloc_rw() Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 3/8] execmem: rework execmem_cache_free() Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 4/8] execmem: move execmem_force_rw() and execmem_restore_rox() before use Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 5/8] execmem: add fallback for failures in vmalloc(VM_ALLOW_HUGE_VMAP) Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 6/8] execmem: drop writable parameter from execmem_fill_trapping_insns() Mike Rapoport
2025-07-13 7:17 ` [PATCH v3 7/8] x86/kprobes: enable EXECMEM_ROX_CACHE for kprobes allocations Mike Rapoport
2025-07-15 0:21 ` Masami Hiramatsu
2025-07-13 7:17 ` [PATCH v3 8/8] x86/ftrace: enable EXECMEM_ROX_CACHE for ftrace allocations Mike Rapoport
2025-07-14 16:22 ` Steven Rostedt [this message]
2025-08-20 22:47 ` Steven Rostedt
2025-08-21 6:11 ` Mike Rapoport
2025-08-21 19:25 ` Steven Rostedt
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