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Re: [PATCH v2 16/24] hw/xen: handle soft reset for primary console
From: |
David Woodhouse |
Subject: |
Re: [PATCH v2 16/24] hw/xen: handle soft reset for primary console |
Date: |
Tue, 24 Oct 2023 16:48:07 +0100 |
User-agent: |
Evolution 3.44.4-0ubuntu2 |
On Tue, 2023-10-24 at 16:44 +0100, Paul Durrant wrote:
> On 19/10/2023 16:40, David Woodhouse wrote:
> > From: David Woodhouse <dwmw@amazon.co.uk>
> >
> > On soft reset, the prinary console event channel needs to be rebound to
> > the backend port (in the xen-console driver). We could put that into the
> > xen-console driver itself, but it's slightly less ugly to keep it within
> > the KVM/Xen code, by stashing the backend port# on event channel reset
> > and then rebinding in the primary console reset when it has to recreate
> > the guest port anyway.
>
> Does Xen re-bind the primary console on EVTCHNOP_reset? That's news to
> me. I go check.
I spent an unhapp hour trying to work out how Xen actually does any of
this :)
In the short term I'm more interested in having soft reset work, than
an explicit EVTCHNOP_reset. And I can't work out *how*, but we do seem
to have console again after a kexec in real Xen.
smime.p7s
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- [PATCH v2 21/24] net: do not delete nics in net_cleanup(), (continued)
- [PATCH v2 21/24] net: do not delete nics in net_cleanup(), David Woodhouse, 2023/10/19
- [PATCH v2 05/24] hw/xen: fix XenStore watch delivery to guest, David Woodhouse, 2023/10/19
- [PATCH v2 10/24] hw/xen: populate store frontend nodes with XenStore PFN/port, David Woodhouse, 2023/10/19
- [PATCH v2 01/24] i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel, David Woodhouse, 2023/10/19
- [PATCH v2 20/24] hw/xenpv: fix '-nic' support for xen-net-device, David Woodhouse, 2023/10/19
- [PATCH v2 16/24] hw/xen: handle soft reset for primary console, David Woodhouse, 2023/10/19
[PATCH v2 19/24] hw/i386/pc: support '-nic' for xen-net-device, David Woodhouse, 2023/10/19
[PATCH v2 11/24] hw/xen: automatically assign device index to block devices, David Woodhouse, 2023/10/19
[PATCH v2 15/24] hw/xen: add support for Xen primary console in emulated mode, David Woodhouse, 2023/10/19
[PATCH v2 03/24] hw/xen: select kernel mode for per-vCPU event channel upcall vector, David Woodhouse, 2023/10/19
[PATCH v2 12/24] hw/xen: add get_frontend_path() method to XenDeviceClass, David Woodhouse, 2023/10/19
[PATCH v2 07/24] hw/xen: Clean up event channel 'type_val' handling to use union, David Woodhouse, 2023/10/19
[PATCH v2 04/24] hw/xen: don't clear map_track[] in xen_gnttab_reset(), David Woodhouse, 2023/10/19