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From: Christoffer Dall <cdall@linaro.org>
To: Julien Thierry <julien.thierry@arm.com>
Cc: marc.zyngier@arm.com, kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [RESEND PATCH 0/2] arm/arm64: kvm: Disable branch profiling in HYP code
Date: Sat, 21 Oct 2017 17:04:29 +0200	[thread overview]
Message-ID: <20171021150429.GC12618@cbox> (raw)
In-Reply-To: <1508499257-10014-1-git-send-email-julien.thierry@arm.com>

On Fri, Oct 20, 2017 at 12:34:15PM +0100, Julien Thierry wrote:
> [Resending for Christoffer and adding kvmarm to recipients]
> 
> Hi,
> 
> When enabling branch profiling, a lockup occurs at boot time, after
> displaying: "kvm [1]: Hyp mode initialized successfully"
> 
> The issue is caused by the Hyp code getting instrumented and trying to
> access unmapped code or data, which happens when trying to initialize EL2.
> 
> So it also seems like KVM is misleadingly announcing it was initialized and
> yet gets stuck during initialization.
> 
> * First patch deals with printing the initialization message once KVM has
>   fully initialized Hyp mode
> * Second patch actually disables branch profiling instrumentation in Hyp
>   code

Applied, thanks.

-Christoffer

WARNING: multiple messages have this Message-ID (diff)
From: cdall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [RESEND PATCH 0/2] arm/arm64: kvm: Disable branch profiling in HYP code
Date: Sat, 21 Oct 2017 17:04:29 +0200	[thread overview]
Message-ID: <20171021150429.GC12618@cbox> (raw)
In-Reply-To: <1508499257-10014-1-git-send-email-julien.thierry@arm.com>

On Fri, Oct 20, 2017 at 12:34:15PM +0100, Julien Thierry wrote:
> [Resending for Christoffer and adding kvmarm to recipients]
> 
> Hi,
> 
> When enabling branch profiling, a lockup occurs at boot time, after
> displaying: "kvm [1]: Hyp mode initialized successfully"
> 
> The issue is caused by the Hyp code getting instrumented and trying to
> access unmapped code or data, which happens when trying to initialize EL2.
> 
> So it also seems like KVM is misleadingly announcing it was initialized and
> yet gets stuck during initialization.
> 
> * First patch deals with printing the initialization message once KVM has
>   fully initialized Hyp mode
> * Second patch actually disables branch profiling instrumentation in Hyp
>   code

Applied, thanks.

-Christoffer

  parent reply	other threads:[~2017-10-21 15:03 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-20 11:34 [RESEND PATCH 0/2] arm/arm64: kvm: Disable branch profiling in HYP code Julien Thierry
2017-10-20 11:34 ` Julien Thierry
2017-10-20 11:34 ` [RESEND PATCH 1/2] arm/arm64: kvm: Move initialization completion message Julien Thierry
2017-10-20 11:34   ` Julien Thierry
2017-10-20 11:34 ` [RESEND PATCH 2/2] arm/arm64: kvm: Disable branch profiling in HYP code Julien Thierry
2017-10-20 11:34   ` Julien Thierry
2017-10-20 11:34   ` Julien Thierry
2017-10-21 15:04 ` Christoffer Dall [this message]
2017-10-21 15:04   ` [RESEND PATCH 0/2] " Christoffer Dall

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