Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Hi Vitaly, On 2016/9/5 17:42, Vitaly Kuznetsov wrote: > Julien Grall writes: > >> Hi Vitaly, >> >> On 26/07/16 13:30, Vitaly Kuznetsov wrote: >>> It may happen that Xen's and Linux's ideas of vCPU id diverge. In >>> particular, when we crash on a secondary vCPU we may want

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Hi Vitaly, On 07/09/2016 12:23, Vitaly Kuznetsov wrote: BTW, were you able to try the patch I suggested? In my opinion it would be preferable to fix the immediate SMP issue now and play with MPIDR info later. Not yet sorry. I will see if I can try to today or tomorrow. Cheers, -- Julien

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Julien Grall writes: > Hi Vitaly, > > On 07/09/2016 10:07, Vitaly Kuznetsov wrote: >> Stefano Stabellini writes: >>> I don't know that much about cpuid, but the virtual MPIDR is constructed >>> from the vcpu id right now: >>> >>> v->arch.vmpidr

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Hi Vitaly, On 07/09/2016 10:07, Vitaly Kuznetsov wrote: Stefano Stabellini writes: I don't know that much about cpuid, but the virtual MPIDR is constructed from the vcpu id right now: v->arch.vmpidr = MPIDR_SMP | vcpuid_to_vaffinity(v->vcpu_id); [...]

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

On 07/09/16 10:07, Vitaly Kuznetsov wrote: > Stefano Stabellini writes: > >> On Tue, 6 Sep 2016, Vitaly Kuznetsov wrote: >>> Stefano Stabellini writes: >>> On Mon, 5 Sep 2016, Vitaly Kuznetsov wrote: > Julien Grall

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Stefano Stabellini writes: > On Tue, 6 Sep 2016, Vitaly Kuznetsov wrote: >> Stefano Stabellini writes: >> >> > On Mon, 5 Sep 2016, Vitaly Kuznetsov wrote: >> >> Julien Grall writes: >> >> >> >> > Hi Vitaly, >> >> > >> >> >

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

On Tue, 6 Sep 2016, Vitaly Kuznetsov wrote: > Stefano Stabellini writes: > > > On Mon, 5 Sep 2016, Vitaly Kuznetsov wrote: > >> Julien Grall writes: > >> > >> > Hi Vitaly, > >> > > >> > On 26/07/16 13:30, Vitaly Kuznetsov wrote: > >> >> It may

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Stefano Stabellini writes: > On Mon, 5 Sep 2016, Vitaly Kuznetsov wrote: >> Julien Grall writes: >> >> > Hi Vitaly, >> > >> > On 26/07/16 13:30, Vitaly Kuznetsov wrote: >> >> It may happen that Xen's and Linux's ideas of vCPU id diverge. In >> >>

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

On Mon, 5 Sep 2016, Vitaly Kuznetsov wrote: > Julien Grall writes: > > > Hi Vitaly, > > > > On 26/07/16 13:30, Vitaly Kuznetsov wrote: > >> It may happen that Xen's and Linux's ideas of vCPU id diverge. In > >> particular, when we crash on a secondary vCPU we may want to do

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Julien Grall writes: > Hi Vitaly, > > On 26/07/16 13:30, Vitaly Kuznetsov wrote: >> It may happen that Xen's and Linux's ideas of vCPU id diverge. In >> particular, when we crash on a secondary vCPU we may want to do kdump >> and unlike plain kexec where we do

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

On 09/02/2016 11:29 AM, Julien Grall wrote: > >> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c >> index 0f87db2..c833912 100644 >> --- a/arch/x86/xen/enlighten.c >> +++ b/arch/x86/xen/enlighten.c >> @@ -1795,6 +1806,12 @@ static void __init init_hvm_pv_info(void) >> >>

Re: [Xen-devel] [PATCH linux v3 3/9] xen: introduce xen_vcpu_id mapping

Hi Vitaly, On 26/07/16 13:30, Vitaly Kuznetsov wrote: It may happen that Xen's and Linux's ideas of vCPU id diverge. In particular, when we crash on a secondary vCPU we may want to do kdump and unlike plain kexec where we do migrate_to_reboot_cpu() we try booting on the vCPU which crashed. This