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From: Miroslav Benes <mbenes@suse.cz>
To: boris.ostrovsky@oracle.com, jgross@suse.com,
	sstabellini@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, hpa@zytor.com, jpoimboe@redhat.com
Cc: x86@kernel.org, xen-devel@lists.xenproject.org,
	linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
	jslaby@suse.cz, andrew.cooper3@citrix.com, jbeulich@suse.com,
	Miroslav Benes <mbenes@suse.cz>
Subject: [PATCH v3 0/2] x86/xen: Make idle tasks reliable
Date: Thu, 26 Mar 2020 10:26:01 +0100
Message-ID: <20200326092603.7230-1-mbenes@suse.cz> (raw)

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.

v2->v3:
- change prototype of asm_cpu_bringup_and_idle()
- replace %_ASM_SP with %rsp and %esp respectively
- fix build for !CONFIG_XEN_PV_SMP

v1->v2:
- call instruction used instead of push+jmp
- initial_stack used directly

v1 https://lore.kernel.org/live-patching/20200312142007.11488-1-mbenes@suse.cz/
v2 https://lore.kernel.org/live-patching/20200319095606.23627-1-mbenes@suse.cz/

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 | 18 ++++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

-- 
2.25.1


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26  9:26 Miroslav Benes [this message]
2020-03-26  9:26 ` [PATCH v3 1/2] x86/xen: Make the boot CPU idle task reliable Miroslav Benes
2020-03-26  9:29   ` Jürgen Groß
2020-03-26  9:26 ` [PATCH v3 2/2] x86/xen: Make the secondary CPU idle tasks reliable Miroslav Benes
2020-03-26  9:30   ` Jürgen Groß

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