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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2017-11-27 09:11:49 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-14 21:11:56 +0100 |
| commit | e85eb632f651e70252bb18b292efaf6961164e32 (patch) | |
| tree | 33d388f85c10aeadc578d948edf484f59671d203 /arch/x86/kernel/jailhouse.c | |
| parent | 87e65d05bb0a18e00655a58159790bc8d38e219e (diff) | |
| download | blackbird-obmc-linux-e85eb632f651e70252bb18b292efaf6961164e32.tar.gz blackbird-obmc-linux-e85eb632f651e70252bb18b292efaf6961164e32.zip | |
x86/jailhouse: Set up timekeeping
Get the precalibrated frequencies for the TSC and the APIC timer from
the Jailhouse platform info and set the kernel values accordingly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: jailhouse-dev@googlegroups.com
Link: https://lkml.kernel.org/r/b2557426332fc337a74d3141cb920f7dce9ad601.1511770314.git.jan.kiszka@siemens.com
Diffstat (limited to 'arch/x86/kernel/jailhouse.c')
| -rw-r--r-- | arch/x86/kernel/jailhouse.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c index 21c107770d67..34cf9d3e1751 100644 --- a/arch/x86/kernel/jailhouse.c +++ b/arch/x86/kernel/jailhouse.c @@ -16,6 +16,7 @@ #include <asm/setup.h> static __initdata struct jailhouse_setup_data setup_data; +static unsigned int precalibrated_tsc_khz; static uint32_t jailhouse_cpuid_base(void) { @@ -31,6 +32,16 @@ static uint32_t __init jailhouse_detect(void) return jailhouse_cpuid_base(); } +static void __init jailhouse_timer_init(void) +{ + lapic_timer_frequency = setup_data.apic_khz * (1000 / HZ); +} + +static unsigned long jailhouse_get_tsc(void) +{ + return precalibrated_tsc_khz; +} + static void __init jailhouse_get_smp_config(unsigned int early) { unsigned int cpu; @@ -66,8 +77,12 @@ static void __init jailhouse_init_platform(void) struct setup_data header; void *mapping; + x86_init.timers.timer_init = jailhouse_timer_init; x86_init.mpparse.get_smp_config = jailhouse_get_smp_config; + x86_platform.calibrate_cpu = jailhouse_get_tsc; + x86_platform.calibrate_tsc = jailhouse_get_tsc; + while (pa_data) { mapping = early_memremap(pa_data, sizeof(header)); memcpy(&header, mapping, sizeof(header)); @@ -95,6 +110,8 @@ static void __init jailhouse_init_platform(void) pmtmr_ioport = setup_data.pm_timer_address; pr_debug("Jailhouse: PM-Timer IO Port: %#x\n", pmtmr_ioport); + + precalibrated_tsc_khz = setup_data.tsc_khz; } bool jailhouse_paravirt(void) |
