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Wed, 30 Sep 2026 08:35:25 -0700 (PDT) Date: Wed, 30 Sep 2026 16:35:04 +0100 In-Reply-To: <20260930153505.2144559-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20260930153505.2144559-1-vdonnefort@google.com> X-Mailer: git-send-email 2.56.0.rc1.315.gc6ed9934b7-goog Message-ID: <20260930153505.2144559-4-vdonnefort@google.com> Subject: [PATCH v3 3/4] tracing/remotes: Add REMOTE_EVENT_CUSTOM_PRINTK() helper From: Vincent Donnefort To: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, kernel-team@android.com, fuad.tabba@linux.dev, Vincent Donnefort , Fuad Tabba , Steven Rostedt Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260930_163528_175914_07C075AC X-CRM114-Status: GOOD ( 14.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The current REMOTE_EVENT() takes as a __printk argument a string format and a list of arguments, such as RE_STRUCT("foo=%d bar=%d", foo, bar). Add a REMOTE_EVENT_CUSTOM_PRINTK() where the __printk argument can be a function. This intends to support the creation of a "printk" event for the arm64 nVHE/pKVM hypervisor with a dynamic prototype and by extension a dynamic print format. Signed-off-by: Vincent Donnefort Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Acked-by: Steven Rostedt --- include/trace/define_remote_events.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/include/trace/define_remote_events.h b/include/trace/define_remote_events.h index 676e803dc144..4f4d58e37b84 100644 --- a/include/trace/define_remote_events.h +++ b/include/trace/define_remote_events.h @@ -35,17 +35,26 @@ do { \ #define RE_PRINTK(__args...) __args -#define REMOTE_EVENT(__name, __id, __struct, __printk) \ - REMOTE_EVENT_FORMAT(__name, __struct); \ +#define REMOTE_EVENT_PRINT_FUNC(__name, __printk) \ static void remote_event_print_##__name(void *evt, struct trace_seq *seq) \ { \ struct remote_event_format_##__name __maybe_unused *__entry = evt; \ trace_seq_puts(seq, #__name); \ - remote_printk(__printk); \ + __printk; \ } + +#define REMOTE_EVENT(__name, __id, __struct, __printk) \ + REMOTE_EVENT_FORMAT(__name, __struct); \ + REMOTE_EVENT_PRINT_FUNC(__name, remote_printk(__printk)) + +#define REMOTE_EVENT_CUSTOM_PRINTK(__name, __id, __struct, __printk) \ + REMOTE_EVENT_FORMAT(__name, __struct); \ + REMOTE_EVENT_PRINT_FUNC(__name, __printk) + #include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) #undef REMOTE_EVENT +#undef REMOTE_EVENT_CUSTOM_PRINTK #undef RE_PRINTK #undef re_field #define re_field(__type, __field) \ @@ -70,4 +79,8 @@ do { \ .print_fmt = remote_event_print_fmt_##__name, \ .print = remote_event_print_##__name, \ } + +#define REMOTE_EVENT_CUSTOM_PRINTK(__name, __id, __struct, __printk) \ + REMOTE_EVENT(__name, __id, RE_STRUCT(__struct), "Unknown") + #include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) -- 2.56.0.rc1.315.gc6ed9934b7-goog