linux-kernel - [PATCH 0/2] x86/xen: Make idle tasks reliable

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Message-Id: <20200312142007.11488-1-mbenes@suse.cz>
Date:   Thu, 12 Mar 2020 15:20:05 +0100
From:   Miroslav Benes <mbenes@...e.cz>
To:     boris.ostrovsky@...cle.com, jgross@...e.com,
        sstabellini@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, jpoimboe@...hat.com
Cc:     x86@...nel.org, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
        jslaby@...e.cz, Miroslav Benes <mbenes@...e.cz>
Subject: [PATCH 0/2] x86/xen: Make idle tasks reliable

The unwinder reports idle tasks' stack on XEN PV as unreliable which
complicates things for at least live patching. The two patches in the
series try to amend that by using similar approach as non-XEN x86 does.

However, I did not come up with a nice solution for secondary CPUs idle
tasks. The patch just shows the idea what should be done but it is an
ugly hack. Ideas are more than welcome.

Miroslav Benes (2):
  x86/xen: Make the boot CPU idle task reliable
  x86/xen: Make the secondary CPU idle tasks reliable

 arch/x86/xen/smp_pv.c   |  3 ++-
 arch/x86/xen/xen-head.S | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

-- 
2.25.1