Re: [Xen-devel] [PATCH v3 1/2] xen/arm: remove physical timer offset

2020-01-23 Thread Julien Grall
Hi, On 17/01/2020 21:24, Jeff Kubascik wrote: On 12/18/2019 9:20 AM, Julien Grall wrote: Hi Jeff, On 11/12/2019 21:13, Jeff Kubascik wrote: The physical timer traps apply an offset so that time starts at 0 for the guest. However, this offset is not currently applied to the physical counter.

Re: [Xen-devel] [PATCH v3 1/2] xen/arm: remove physical timer offset

2020-01-17 Thread Jeff Kubascik
On 12/18/2019 9:20 AM, Julien Grall wrote: > Hi Jeff, > > On 11/12/2019 21:13, Jeff Kubascik wrote: >> The physical timer traps apply an offset so that time starts at 0 for >> the guest. However, this offset is not currently applied to the physical >> counter. Per the ARMv8 Reference Manual (ARM

Re: [Xen-devel] [PATCH v3 1/2] xen/arm: remove physical timer offset

2019-12-18 Thread Julien Grall
Hi Jeff, On 11/12/2019 21:13, Jeff Kubascik wrote: The physical timer traps apply an offset so that time starts at 0 for the guest. However, this offset is not currently applied to the physical counter. Per the ARMv8 Reference Manual (ARM DDI 0487E.a), section D11.2.4 Timers, the "Offset"

[Xen-devel] [PATCH v3 1/2] xen/arm: remove physical timer offset

2019-12-11 Thread Jeff Kubascik
The physical timer traps apply an offset so that time starts at 0 for the guest. However, this offset is not currently applied to the physical counter. Per the ARMv8 Reference Manual (ARM DDI 0487E.a), section D11.2.4 Timers, the "Offset" between the counter and timer should be zero for a physical