linux-kernel - Re: [PATCH AUTOSEL 5.12 039/116] KVM: arm64: Use BUG and BUG

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Date:   Wed, 05 May 2021 17:49:41 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Andrew Scull <ascull@...gle.com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu
Subject: Re: [PATCH AUTOSEL 5.12 039/116] KVM: arm64: Use BUG and BUG_ON in nVHE hyp

On Wed, 05 May 2021 17:30:07 +0100,
Sasha Levin <sashal@...nel.org> wrote:
> 
> From: Andrew Scull <ascull@...gle.com>
> 
> [ Upstream commit f79e616f27ab6cd74deb0995a8eead3d1c9d65af ]
> 
> hyp_panic() reports the address of the panic by using ELR_EL2, but this
> isn't a useful address when hyp_panic() is called directly. Replace such
> direct calls with BUG() and BUG_ON() which use BRK to trigger an
> exception that then goes to hyp_panic() with the correct address. Also
> remove the hyp_panic() declaration from the header file to avoid
> accidental misuse.
> 
> Signed-off-by: Andrew Scull <ascull@...gle.com>
> Acked-by: Will Deacon <will@...nel.org>
> Signed-off-by: Marc Zyngier <maz@...nel.org>
> Link: https://lore.kernel.org/r/20210318143311.839894-5-ascull@google.com
> Signed-off-by: Sasha Levin <sashal@...nel.org>

Same this for this patch.

	M.

-- 
Without deviation from the norm, progress is not possible.