| cd240c9c | 06-Jan-2021 |
Konstantin Belousov <[email protected]> |
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
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
show more ...
|
| 5bf4bafd | 06-Jan-2021 |
Konstantin Belousov <[email protected]> |
x86 vdso gettc: eliminate duplicated code in ifunc selectors.
Create array of rdtsc selectors and provide helper that calculate the
index into the selectors array.
Reviewed by: gallatin, markj
MFC
x86 vdso gettc: eliminate duplicated code in ifunc selectors.
Create array of rdtsc selectors and provide helper that calculate the
index into the selectors array.
Reviewed by: gallatin, markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27986
show more ...
|