linux-kernel - [PATCH v2 0/3] hvc/xen: Xen console fixes.

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Message-Id: <20231020161529.355083-1-dwmw2@infradead.org>
Date:   Fri, 20 Oct 2023 17:15:26 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Roger Pau Monne <roger.pau@...rix.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Dawei Li <set_pte_at@...look.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-serial@...r.kernel.org, Paul Durrant <paul@....org>
Subject: [PATCH v2 0/3] hvc/xen: Xen console fixes.

It started out relatively simple, fixing the fact that the secondary
consoles didn't work at *all* due to bugs in the IRQ setup. There were
one or two other simple fixes that I snuck into the same patch in v1.

But it's much more broken than that, so split the fixes out, especially
the last one for hot-unplug.

Preserving the Reviewed-by: from Jürgen on the first two seems fair;
the third patch is new and exciting but *does* fix the case of removing
the console while userspace is spamming it.

And all I really wanted to do this week was spin up a PV guest under KVM 
so I could play with its SMEP behaviour...

David Woodhouse (3):
      hvc/xen: fix event channel handling for secondary consoles
      hvc/xen: fix error path in xen_hvc_init() to always register frontend driver
      hvc/xen: fix console unplug

 drivers/tty/hvc/hvc_xen.c | 39 ++++++++++++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 11 deletions(-)