From: Marc Zyngier <marc.zyngier@arm.com>
To: James Morse <james.morse@arm.com>, kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: KVM: Register CPU notifiers when the kernel runs at HYP
Date: Thu, 31 Mar 2016 09:15:15 +0100 [thread overview]
Message-ID: <56FCDC93.3070304@arm.com> (raw)
In-Reply-To: <1459359184-15601-1-git-send-email-james.morse@arm.com>
On 30/03/16 18:33, James Morse wrote:
> When the kernel is running at EL2, it doesn't need init_hyp_mode() to
> configure page tables for HYP. This function also registers the CPU
> hotplug and lower power notifiers that cause HYP to be re-initialised
> after the CPU has been reset.
>
> To avoid losing the register state that controls stage2 translation, move
> the registering of these notifiers into init_subsystems(), and add a
> is_kernel_in_hyp_mode() path to each callback.
>
> Fixes: 1e947bad0b6 ("arm64: KVM: Skip HYP setup when already running in HYP")
> Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] arm64: KVM: Register CPU notifiers when the kernel runs at HYP
Date: Thu, 31 Mar 2016 09:15:15 +0100 [thread overview]
Message-ID: <56FCDC93.3070304@arm.com> (raw)
In-Reply-To: <1459359184-15601-1-git-send-email-james.morse@arm.com>
On 30/03/16 18:33, James Morse wrote:
> When the kernel is running at EL2, it doesn't need init_hyp_mode() to
> configure page tables for HYP. This function also registers the CPU
> hotplug and lower power notifiers that cause HYP to be re-initialised
> after the CPU has been reset.
>
> To avoid losing the register state that controls stage2 translation, move
> the registering of these notifiers into init_subsystems(), and add a
> is_kernel_in_hyp_mode() path to each callback.
>
> Fixes: 1e947bad0b6 ("arm64: KVM: Skip HYP setup when already running in HYP")
> Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2016-03-31 8:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-30 17:33 [PATCH v2] arm64: KVM: Register CPU notifiers when the kernel runs at HYP James Morse
2016-03-30 17:33 ` James Morse
2016-03-31 8:15 ` Marc Zyngier [this message]
2016-03-31 8:15 ` Marc Zyngier
2016-03-31 8:26 ` Christoffer Dall
2016-03-31 8:26 ` Christoffer Dall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56FCDC93.3070304@arm.com \
--to=marc.zyngier@arm.com \
--cc=james.morse@arm.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.