pvclock: Add vDSO support
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ret = now;
if ((flags & PVCLOCK_FLAG_TSC_STABLE) == 0) {
    last = atomic_load_acq_64(&pvclock_last_systime);
    do {
        if (last > now) {
            ret = last;
            break;
        }
    } while (!atomic_fcmpset_64(&pvclock_last_systime, &last, now);
}

Address @markj's feedback.

Harbormaster completed remote builds in B40879: Diff 93292.Aug 5 2021, 10:53 PM

adam_fenn.io marked 2 inline comments as done.Aug 5 2021, 10:54 PM

This revision was not accepted when it landed; it landed in state Needs Review.Aug 14 2021, 12:59 PM

Closed by commit rG0b3382b863f3: pvclock: Add 'struct pvclock' API (authored by adam_fenn.io, committed by kib). · Explain Why

This revision was automatically updated to reflect the committed changes.

kib added a commit: rG0b3382b863f3: pvclock: Add 'struct pvclock' API.

kib added a commit: rGd4b2d3035a23: pvclock: Add vDSO support.

kib added a commit: rGa3d932dfef5e: libc: vDSO timekeeping: Add pvclock support.

kib added a commit: rG249f2478e382: pvclock: Add 'struct pvclock' API.Oct 12 2021, 4:04 PM

kib added a commit: rG4b34c91973dd: pvclock: Add vDSO support.

kib added a commit: rG2a16b0f333d4: libc: vDSO timekeeping: Add pvclock support.

Revision Contents
Changeset List

Path

Size

lib/

libc/

x86/

sys/

__vdso_gettc.c

63 lines

sys/

dev/

acpica/

acpi_hpet.c

4 lines

hyperv/

vmbus/

amd64/

hyperv_machdep.c

2 lines

x86/

include/

pvclock.h

89 lines

vdso.h

5 lines

x86/

pvclock.c

355 lines

tsc.c

4 lines

Diff 93292

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lib/libc/x86/sys/__vdso_gettc.c

Show First 20 Lines • Show All 100 Lines • ▼ Show 20 Lines	__DEFAULT_YES_OPTIONS = \
FLOPPY \		FLOPPY \
FMTREE \		FMTREE \
FORTH \		FORTH \
FP_LIBC \		FP_LIBC \
FREEBSD_UPDATE \		FREEBSD_UPDATE \
FTP \		FTP \
GAMES \		GAMES \
GDB \		GDB \
GDB_LIBEXEC \
GNU_DIFF \		GNU_DIFF \
GNU_GREP \		GNU_GREP \
GOOGLETEST \		GOOGLETEST \
GPIO \		GPIO \
HAST \		HAST \
HTML \		HTML \
HYPERV \		HYPERV \
ICONV \		ICONV \
▲ Show 20 Lines • Show All 400 Lines • Show Last 20 Lines

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sys/dev/acpica/acpi_hpet.c

Show First 20 Lines • Show All 100 Lines • ▼ Show 20 Lines	__DEFAULT_YES_OPTIONS = \
FLOPPY \		FLOPPY \
FMTREE \		FMTREE \
FORTH \		FORTH \
FP_LIBC \		FP_LIBC \
FREEBSD_UPDATE \		FREEBSD_UPDATE \
FTP \		FTP \
GAMES \		GAMES \
GDB \		GDB \
GDB_LIBEXEC \
GNU_DIFF \		GNU_DIFF \
GNU_GREP \		GNU_GREP \
GOOGLETEST \		GOOGLETEST \
GPIO \		GPIO \
HAST \		HAST \
HTML \		HTML \
HYPERV \		HYPERV \
ICONV \		ICONV \
▲ Show 20 Lines • Show All 400 Lines • Show Last 20 Lines

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sys/dev/hyperv/vmbus/amd64/hyperv_machdep.c

Show First 20 Lines • Show All 100 Lines • ▼ Show 20 Lines	__DEFAULT_YES_OPTIONS = \
FLOPPY \		FLOPPY \
FMTREE \		FMTREE \
FORTH \		FORTH \
FP_LIBC \		FP_LIBC \
FREEBSD_UPDATE \		FREEBSD_UPDATE \
FTP \		FTP \
GAMES \		GAMES \
GDB \		GDB \
GDB_LIBEXEC \
GNU_DIFF \		GNU_DIFF \
GNU_GREP \		GNU_GREP \
GOOGLETEST \		GOOGLETEST \
GPIO \		GPIO \
HAST \		HAST \
HTML \		HTML \
HYPERV \		HYPERV \
ICONV \		ICONV \
▲ Show 20 Lines • Show All 400 Lines • Show Last 20 Lines

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sys/x86/include/pvclock.h

Show First 20 Lines • Show All 100 Lines • ▼ Show 20 Lines	__DEFAULT_YES_OPTIONS = \
FLOPPY \		FLOPPY \
FMTREE \		FMTREE \
FORTH \		FORTH \
FP_LIBC \		FP_LIBC \
FREEBSD_UPDATE \		FREEBSD_UPDATE \
FTP \		FTP \
GAMES \		GAMES \
GDB \		GDB \
GDB_LIBEXEC \
GNU_DIFF \		GNU_DIFF \
GNU_GREP \		GNU_GREP \
GOOGLETEST \		GOOGLETEST \
GPIO \		GPIO \
HAST \		HAST \
HTML \		HTML \
HYPERV \		HYPERV \
ICONV \		ICONV \
▲ Show 20 Lines • Show All 400 Lines • Show Last 20 Lines