diff options
| author | Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com> | 2024-05-13 12:38:09 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-06-03 11:18:51 +0200 |
| commit | 0f532a789f1b24258043d0f856409d2ab974fb64 (patch) | |
| tree | 91834ebc299b3b6505b360c860858780a0c9ffb5 /arch/x86/kernel/tsc.c | |
| parent | ice/ptp: Remove convert_art_to_tsc() (diff) | |
| download | linux-0f532a789f1b24258043d0f856409d2ab974fb64.tar.xz linux-0f532a789f1b24258043d0f856409d2ab974fb64.zip | |
x86/tsc: Remove obsolete ART to TSC conversion functions
convert_art_to_tsc() and convert_art_ns_to_tsc() interfaces are no
longer required. The conversion is now handled by the core code.
Signed-off-by: Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240513103813.5666-9-lakshmi.sowjanya.d@intel.com
Diffstat (limited to 'arch/x86/kernel/tsc.c')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index d1888db5db91..d4462fb26299 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -1297,66 +1297,6 @@ int unsynchronized_tsc(void) return 0; } -/* - * Convert ART to TSC given numerator/denominator found in detect_art() - */ -struct system_counterval_t convert_art_to_tsc(u64 art) -{ - u64 tmp, res, rem; - - rem = do_div(art, art_base_clk.denominator); - - res = art * art_base_clk.numerator; - tmp = rem * art_base_clk.numerator; - - do_div(tmp, art_base_clk.denominator); - res += tmp + art_base_clk.offset; - - return (struct system_counterval_t) { - .cs_id = have_art ? CSID_X86_TSC : CSID_GENERIC, - .cycles = res, - }; -} -EXPORT_SYMBOL(convert_art_to_tsc); - -/** - * convert_art_ns_to_tsc() - Convert ART in nanoseconds to TSC. - * @art_ns: ART (Always Running Timer) in unit of nanoseconds - * - * PTM requires all timestamps to be in units of nanoseconds. When user - * software requests a cross-timestamp, this function converts system timestamp - * to TSC. - * - * This is valid when CPU feature flag X86_FEATURE_TSC_KNOWN_FREQ is set - * indicating the tsc_khz is derived from CPUID[15H]. Drivers should check - * that this flag is set before conversion to TSC is attempted. - * - * Return: - * struct system_counterval_t - system counter value with the ID of the - * corresponding clocksource: - * cycles: System counter value - * cs_id: The clocksource ID for validating comparability - */ - -struct system_counterval_t convert_art_ns_to_tsc(u64 art_ns) -{ - u64 tmp, res, rem; - - rem = do_div(art_ns, USEC_PER_SEC); - - res = art_ns * tsc_khz; - tmp = rem * tsc_khz; - - do_div(tmp, USEC_PER_SEC); - res += tmp; - - return (struct system_counterval_t) { - .cs_id = have_art ? CSID_X86_TSC : CSID_GENERIC, - .cycles = res, - }; -} -EXPORT_SYMBOL(convert_art_ns_to_tsc); - static void tsc_refine_calibration_work(struct work_struct *work); static DECLARE_DELAYED_WORK(tsc_irqwork, tsc_refine_calibration_work); /** |