From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Petr Mladek <pmladek@suse.com>
Cc: Joe Lawrence <joe.lawrence@redhat.com>,
live-patching@vger.kernel.org, linux-kernel@vger.kernel.org,
Jessica Yu <jeyu@kernel.org>, Jiri Kosina <jikos@kernel.org>,
Miroslav Benes <mbenes@suse.cz>,
Chris J Arges <chris.j.arges@canonical.com>
Subject: Re: [PATCH] livepatch: add (un)patch hooks
Date: Wed, 19 Jul 2017 23:20:00 -0500 [thread overview]
Message-ID: <20170720042000.34trkuzwevrkscds@treble> (raw)
In-Reply-To: <20170720041723.35r6qk2fia7xix3t@treble>
On Wed, Jul 19, 2017 at 11:17:23PM -0500, Josh Poimboeuf wrote:
> +static void swapgs_unload_hook(void)
> +{
> + if (paravirt_enabled() && strcmp(pv_info.name, "KVM"))
> + return;
> +
> + write_cr0(read_cr0() & ~X86_CR0_WP);
> + barrier();
> +
> + set_intr_gate_ist(X86_TRAP_SS, stack_segment_v2, STACKFAULT_STACK);
s/stack_segment_v2/stack_segment/ for the unload hook
> +
> + barrier();
> + write_cr0(read_cr0() | X86_CR0_WP);
> +}
> +KLP_UNLOAD_HOOK(swapgs_unload_hook);
--
Josh
next prev parent reply other threads:[~2017-07-20 4:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-12 14:09 [PATCH] livepatch hooks, revisted Joe Lawrence
2017-07-12 14:10 ` [PATCH] livepatch: add (un)patch hooks Joe Lawrence
2017-07-14 1:46 ` Josh Poimboeuf
2017-07-14 13:23 ` Joe Lawrence
2017-07-14 13:46 ` Josh Poimboeuf
2017-07-18 11:10 ` Miroslav Benes
2017-07-18 11:15 ` Miroslav Benes
2017-07-19 2:08 ` Josh Poimboeuf
2017-07-19 15:29 ` Petr Mladek
2017-07-19 19:11 ` Miroslav Benes
2017-07-17 15:51 ` Petr Mladek
2017-07-19 18:59 ` Joe Lawrence
2017-07-20 14:36 ` Petr Mladek
2017-07-19 20:49 ` Josh Poimboeuf
2017-07-20 4:17 ` Josh Poimboeuf
2017-07-20 4:20 ` Josh Poimboeuf [this message]
2017-07-20 4:30 ` Josh Poimboeuf
2017-07-20 15:50 ` Petr Mladek
2017-07-20 17:04 ` Josh Poimboeuf
2017-07-27 20:43 ` Joe Lawrence
2017-07-27 21:36 ` Josh Poimboeuf
2017-07-28 18:08 ` Joe Lawrence
2017-07-28 18:29 ` Josh Poimboeuf
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