From: David Woodhouse <dwmw2@infradead.org>
To: paul@xen.org, qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Hanna Reitz" <hreitz@redhat.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Anthony Perard" <anthony.perard@citrix.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Eduardo Habkost" <eduardo@habkost.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Jason Wang" <jasowang@redhat.com>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Cleber Rosa" <crosa@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Wainer dos Santos Moschetta" <wainersm@redhat.com>,
"Beraldo Leal" <bleal@redhat.com>,
qemu-block@nongnu.org, xen-devel@lists.xenproject.org,
kvm@vger.kernel.org, "Bernhard Beschow" <shentey@gmail.com>,
"Joel Upham" <jupham125@gmail.com>
Subject: Re: [PATCH v2 16/24] hw/xen: handle soft reset for primary console
Date: Tue, 24 Oct 2023 16:48:07 +0100 [thread overview]
Message-ID: <3124d1d6e9af139a3c7b6dbe2b73a82914d3f559.camel@infradead.org> (raw)
In-Reply-To: <8ba01df3-6189-4e1e-a70f-37a2d4dd21ed@xen.org>
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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.
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next prev parent reply other threads:[~2023-10-24 15:49 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-19 15:39 [PATCH v2 0/24] Get Xen PV shim running in Qemu, add net & console David Woodhouse
2023-10-19 15:39 ` [PATCH v2 01/24] i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel David Woodhouse
2023-10-19 15:39 ` [PATCH v2 02/24] i386/xen: fix per-vCPU upcall vector for Xen emulation David Woodhouse
2023-10-19 15:39 ` [PATCH v2 03/24] hw/xen: select kernel mode for per-vCPU event channel upcall vector David Woodhouse
2023-10-24 15:02 ` Paul Durrant
2023-10-19 15:40 ` [PATCH v2 04/24] hw/xen: don't clear map_track[] in xen_gnttab_reset() David Woodhouse
2023-10-24 15:03 ` Paul Durrant
2023-10-19 15:40 ` [PATCH v2 05/24] hw/xen: fix XenStore watch delivery to guest David Woodhouse
2023-10-24 15:19 ` Paul Durrant
2023-10-24 15:27 ` David Woodhouse
2023-10-19 15:40 ` [PATCH v2 06/24] i386/xen: Ignore VCPU_SSHOTTMR_future flag in set_singleshot_timer() David Woodhouse
2023-10-19 15:40 ` [PATCH v2 07/24] hw/xen: Clean up event channel 'type_val' handling to use union David Woodhouse
2023-10-19 15:40 ` [PATCH v2 08/24] include: update Xen public headers to Xen 4.17.2 release David Woodhouse
2023-10-19 15:40 ` [PATCH v2 09/24] i386/xen: advertise XEN_HVM_CPUID_UPCALL_VECTOR in CPUID David Woodhouse
2023-10-19 15:40 ` [PATCH v2 10/24] hw/xen: populate store frontend nodes with XenStore PFN/port David Woodhouse
2023-10-24 15:36 ` Paul Durrant
2023-10-19 15:40 ` [PATCH v2 11/24] hw/xen: automatically assign device index to block devices David Woodhouse
2023-10-19 15:40 ` [PATCH v2 12/24] hw/xen: add get_frontend_path() method to XenDeviceClass David Woodhouse
2023-10-19 15:40 ` [PATCH v2 13/24] hw/xen: do not repeatedly try to create a failing backend device David Woodhouse
2023-10-19 15:40 ` [PATCH v2 14/24] hw/xen: update Xen console to XenDevice model David Woodhouse
2023-10-19 15:40 ` [PATCH v2 15/24] hw/xen: add support for Xen primary console in emulated mode David Woodhouse
2023-10-19 15:40 ` [PATCH v2 16/24] hw/xen: handle soft reset for primary console David Woodhouse
2023-10-24 15:44 ` Paul Durrant
2023-10-24 15:48 ` David Woodhouse [this message]
2023-10-24 16:22 ` Paul Durrant
2023-10-24 18:38 ` David Woodhouse
2023-10-19 15:40 ` [PATCH v2 17/24] hw/xen: only remove peers of PCI NICs on unplug David Woodhouse
2023-10-19 15:40 ` [PATCH v2 18/24] hw/xen: update Xen PV NIC to XenDevice model David Woodhouse
2023-10-19 15:40 ` [PATCH v2 19/24] hw/i386/pc: support '-nic' for xen-net-device David Woodhouse
2023-10-19 15:40 ` [PATCH v2 20/24] hw/xenpv: fix '-nic' support " David Woodhouse
2023-10-19 15:40 ` [PATCH v2 21/24] net: do not delete nics in net_cleanup() David Woodhouse
2023-10-19 15:40 ` [PATCH v2 22/24] tests/avocado: switch to using xen-net-device for Xen guest tests David Woodhouse
2023-10-23 7:33 ` David Woodhouse
2023-10-19 15:40 ` [PATCH v2 23/24] xen-platform: unplug AHCI disks David Woodhouse
2023-10-19 15:40 ` [PATCH v2 24/24] docs: update Xen-on-KVM documentation David Woodhouse
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