search for: hvm_set_guest_tim

When using a vtsc, hvm_set_guest_time changes hvm_vcpu.stime_offset, which is used in the vcpu time structure to calculate the tsc_timestamp, so after updating stime_offset we need to propagate the change to vcpu_time in order for the guest to get the right time if using the PV clock. This was not done correctly, since in context_swi...

Hi Ian/Stefano: I changed over to the PV clock for hybrid liked we talked at the hackathon. I still have the hang in update_wall_time() after dom0 switches to xen as clocksource. The source of hang seems to be in xen stime_local_stamp in cpu_time that suddenly jumps to a large 64bit value. I''ve been chasing to figure where that happens, and why for the hybrid and not PV. It appears the

Changeset 17716 provides monotonically increasing guest time for HVM domains, by using the per-domain pl_time structure. hvm_get_guest_time and hvm_set_guest_time were changed to use this. Previously, the guest time was stored directly in the TSC offset fields of the vmx/smv control structures. Since pt_freeze_time and pt_thaw_time use hvm_get/set_guest_time, they now no longer freeze TSC time for a guest. So, for timer_mode 0, TSC time is no longer fr...

...void (*load_cpu_ctxt)( + struct vcpu *v, struct hvmcpu_context *ctxt); + /* * Examine specifics of the guest state: * 1) determine whether paging is enabled, @@ -157,6 +164,35 @@ hvm_load_cpu_guest_regs(struct vcpu *v, hvm_funcs.load_cpu_guest_regs(v, r); } +void hvm_set_guest_time(struct vcpu *v, u64 gtime); +u64 hvm_get_guest_time(struct vcpu *v); + +static inline void +hvm_save_cpu_context( + struct vcpu *v, struct hvmcpu_context *ctxt) +{ + hvm_funcs.save_cpu_ctxt(v, ctxt); + + /* save guest time */ + ctxt->gtime = hvm_get_guest_time(v); + + /* set...

The value of ACPI PM-Timer may be broken on save unless the timer mode is delay_for_missed_ticks. With other timer modes, vcpu->arch.hvm_vcpu.guest_time is always zero and the adjustment from its value is wrong. This patch fixes the saved value of ACPI PM-Timer: - don''t adjust the PM-Timer if vcpu->arch.hvm_vcpu.guest_time is zero. - consolidate calculations of PM-Timer to one