Konstantin Belousov cd240c9cf1 x86 vdso gettc: Add RDTSCP support ... Detect and use RDTSCP if available, instead of fence+RDTSC. For AMD Zens+, use LFENCE+RDTSC instead of RDTSCP (or MFENCE;RDTSC previously). Reviewed by: gallatin, markj Tested by: pho MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D27986		2021-01-10 04:42:34 +02:00
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sys	x86 vdso gettc: Add RDTSCP support	2021-01-10 04:42:34 +02:00