From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- tools/testing/selftests/clock-helpers.h | 76 +++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 tools/testing/selftests/clock-helpers.h (limited to 'tools/testing/selftests/clock-helpers.h') diff --git a/tools/testing/selftests/clock-helpers.h b/tools/testing/selftests/clock-helpers.h new file mode 100644 index 000000000..01451f538 --- /dev/null +++ b/tools/testing/selftests/clock-helpers.h @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __CLOCK_HELPERS_H +#define __CLOCK_HELPERS_H + +#include +#include + +#define MSEC_PER_SEC 1000LL +#define USEC_PER_MSEC 1000LL +#define NSEC_PER_USEC 1000LL +#define NSEC_PER_MSEC 1000000LL +#define USEC_PER_SEC 1000000LL +#define NSEC_PER_SEC 1000000000LL +#define PSEC_PER_SEC 1000000000000LL +#define FSEC_PER_SEC 1000000000000000LL + +#ifndef CLOCK_AUX +#define CLOCK_AUX 16 +#endif + +#ifndef MAX_AUX_CLOCKS +#define MAX_AUX_CLOCKS 8 +#endif + +#ifndef CLOCK_AUX_LAST +#define CLOCK_AUX_LAST (CLOCK_AUX + MAX_AUX_CLOCKS - 1) +#endif + +__attribute__((unused)) +static inline const char *clock_name(clockid_t clockid) +{ + switch (clockid) { + case CLOCK_REALTIME: + return "CLOCK_REALTIME"; + case CLOCK_MONOTONIC: + return "CLOCK_MONOTONIC"; + case CLOCK_PROCESS_CPUTIME_ID: + return "CLOCK_PROCESS_CPUTIME_ID"; + case CLOCK_THREAD_CPUTIME_ID: + return "CLOCK_THREAD_CPUTIME_ID"; + case CLOCK_MONOTONIC_RAW: + return "CLOCK_MONOTONIC_RAW"; + case CLOCK_REALTIME_COARSE: + return "CLOCK_REALTIME_COARSE"; + case CLOCK_MONOTONIC_COARSE: + return "CLOCK_MONOTONIC_COARSE"; + case CLOCK_BOOTTIME: + return "CLOCK_BOOTTIME"; + case CLOCK_REALTIME_ALARM: + return "CLOCK_REALTIME_ALARM"; + case CLOCK_BOOTTIME_ALARM: + return "CLOCK_BOOTTIME_ALARM"; + case CLOCK_TAI: + return "CLOCK_TAI"; + case CLOCK_AUX + 0: + return "CLOCK_AUX0"; + case CLOCK_AUX + 1: + return "CLOCK_AUX1"; + case CLOCK_AUX + 2: + return "CLOCK_AUX2"; + case CLOCK_AUX + 3: + return "CLOCK_AUX3"; + case CLOCK_AUX + 4: + return "CLOCK_AUX4"; + case CLOCK_AUX + 5: + return "CLOCK_AUX5"; + case CLOCK_AUX + 6: + return "CLOCK_AUX6"; + case CLOCK_AUX + 7: + return "CLOCK_AUX7"; + }; + return "UNKNOWN_CLOCKID"; +} + +#endif /* __CLOCK_HELPERS_H */ -- cgit v1.3.1