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d="scan'208";a="52750854" From: Andrew Cooper To: Xen-devel CC: Andrew Cooper , George Dunlap , Ian Jackson , Jan Beulich , Stefano Stabellini , Wei Liu , Julien Grall Subject: [PATCH v2.1 13/12] xen/trace: Introduce new API Date: Mon, 20 Sep 2021 20:29:39 +0100 Message-ID: <20210920192939.16483-1-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210920172529.24932-1-andrew.cooper3@citrix.com> References: <20210920172529.24932-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Content-Type: text/plain This will be used to clean up mess of macros which exists throughout the codebase. Signed-off-by: Andrew Cooper --- CC: George Dunlap CC: Ian Jackson CC: Jan Beulich CC: Stefano Stabellini CC: Wei Liu CC: Julien Grall v2.1: * New --- xen/include/xen/trace.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/xen/include/xen/trace.h b/xen/include/xen/trace.h index 055883287e8c..72c20550f6a6 100644 --- a/xen/include/xen/trace.h +++ b/xen/include/xen/trace.h @@ -74,6 +74,30 @@ static inline void __trace_hypercall(uint32_t event, unsigned long op, const xen_ulong_t *args) {} #endif /* CONFIG_TRACEBUFFER */ +/* + * Create a trace record, packaging up to 7 additional parameters into a + * uint32_t array. + */ +#define TRACE_INTERNAL(_e, _c, ...) \ + do { \ + if ( unlikely(tb_init_done) ) \ + { \ + uint32_t _d[] = { __VA_ARGS__ }; \ + BUILD_BUG_ON(ARRAY_SIZE(_d) > TRACE_EXTRA_MAX); \ + __trace_var(_e, _c, sizeof(_d), sizeof(_d) ? _d : NULL); \ + } \ + } while ( 0 ) + +/* Split a uint64_t into two adjacent uint32_t's for a trace record. */ +#define TRACE_PARAM64(p) (uint32_t)(p), ((p) >> 32) + +/* Create a trace record with time included. */ +#define TRACE_TIME(_e, ...) TRACE_INTERNAL(_e, true, ##__VA_ARGS__) + +/* Create a trace record with no time included. */ +#define TRACE(_e, ...) TRACE_INTERNAL(_e, false, ##__VA_ARGS__) + + /* Convenience macros for calling the trace function. */ #define TRACE_0D(_e) \ do { \ -- 2.11.0