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hv: calibrate vrtc when modify physical time

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For Service VM modify physical rtc time and vrtc will calibrate
time by read physical rtc. So when Service VM modify physical
time, calibrate all vrtc.

Tracked-On: #7440
Signed-off-by: Yuanyuan Zhao <yuanyuan.zhao@linux.intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
This commit is contained in:
Yuanyuan Zhao 2022-04-26 10:33:56 +08:00 committed by acrnsi-robot
parent 4bad719fd3
commit 145a56d448
1 changed files with 20 additions and 1 deletions
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21
hypervisor/dm/vrtc.c
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@ -40,6 +40,9 @@
# define RTC_DEBUG(format, ...) do { } while (false)
#endif
static time_t vrtc_get_physical_rtc_time(struct acrn_vrtc *vrtc);
static void vrtc_update_basetime(time_t physical_time, time_t offset);
struct clktime {
uint32_t year; /* year (4 digit year) */
uint32_t mon; /* month (1 - 12) */
@ -524,6 +527,12 @@ static bool vrtc_read(struct acrn_vcpu *vcpu, uint16_t addr, __unused size_t wid
return ret;
}
static inline bool vrtc_is_time_register(uint32_t offset)
{
return ((offset == RTC_SEC) || (offset == RTC_MIN) || (offset == RTC_HRS) || (offset == RTC_DAY)
|| (offset == RTC_MONTH) || (offset == RTC_YEAR) || (offset == RTC_CENTURY));
}
/**
* @pre vcpu != NULL
* @pre vcpu->vm != NULL
@ -533,13 +542,23 @@ static bool vrtc_write(struct acrn_vcpu *vcpu, uint16_t addr, size_t width,
{
time_t current, after;
struct acrn_vrtc *vrtc = &vcpu->vm->vrtc;
struct acrn_vrtc temp_vrtc;
bool is_time_register;
uint8_t mask = 0xFFU;
if ((width == 1U) && (addr == CMOS_ADDR_PORT)) {
vrtc->addr = (uint8_t)(value & 0x7FU);
} else {
if (is_service_vm(vcpu->vm)) {
cmos_set_reg_val(vrtc->addr, (uint8_t)(value & 0xFFU));
is_time_register = vrtc_is_time_register(vrtc->addr);
if (is_time_register) {
current = vrtc_get_physical_rtc_time(&temp_vrtc);
}
cmos_set_reg_val(vcpu->vm->vrtc.addr, (uint8_t)(value & 0xFFU));
if (is_time_register) {
after = vrtc_get_physical_rtc_time(&temp_vrtc);
vrtc_update_basetime(after, current - after);
}
} else {
switch (vrtc->addr) {
case RTC_STATUSA: