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HV: timer: keep TSC frequency in KHz

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This patch represents TSC freqeuency in KHz using a 32-bit unsigned integer.

The conversion macros between ticks and us/ms are changed to inline functions to
enforce the types of the input parameters. Note that us_to_ticks accepts only
uint32_t (~4K us at most) and never overflows.

Results of some unit tests on the conversion functions:

    calibrate_tsc, tsc_khz=1881600
    64us -> ticks: 120422
    64us -> ticks -> us: 63
    511us -> ticks: 961497
    511us -> ticks -> us: 510
    1280000 ticks -> us: 680
    1280000 ticks -> us -> ticks: 1279488

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Junjie Mao
2018-07-03 03:41:02 +08:00
committed by lijinxia
parent ffc0b27db4
commit e75cca64c8
7 changed files with 33 additions and 15 deletions
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4
hypervisor/arch/x86/cpu.c
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@@ -497,12 +497,12 @@ static void bsp_boot_post(void)
pr_acrnlog("HV version %d.%d-rc%d-%s-%s %s build by %s, start time %lluus",
HV_MAJOR_VERSION, HV_MINOR_VERSION, HV_RC_VERSION,
HV_BUILD_TIME, HV_BUILD_VERSION, HV_BUILD_TYPE,
HV_BUILD_USER, TICKS_TO_US(start_tsc));
HV_BUILD_USER, ticks_to_us(start_tsc));
else
pr_acrnlog("HV version %d.%d-%s-%s %s build by %s, start time %lluus",
HV_MAJOR_VERSION, HV_MINOR_VERSION,
HV_BUILD_TIME, HV_BUILD_VERSION, HV_BUILD_TYPE,
HV_BUILD_USER, TICKS_TO_US(start_tsc));
HV_BUILD_USER, ticks_to_us(start_tsc));
pr_acrnlog("API version %d.%d",
HV_API_MAJOR_VERSION, HV_API_MINOR_VERSION);