linux-kernel - Re: [PATCH v2 stable-5.12.y backport 0/2] KVM: arm64: Commit exception state on exit to userspace

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Date:   Tue, 8 Jun 2021 17:47:07 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Zenghui Yu <yuzenghui@...wei.com>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        sashal@...nel.org, maz@...nel.org, alexandru.elisei@....com,
        wanghaibin.wang@...wei.com
Subject: Re: [PATCH v2 stable-5.12.y backport 0/2] KVM: arm64: Commit
 exception state on exit to userspace

On Tue, Jun 01, 2021 at 10:07:36PM +0800, Zenghui Yu wrote:
> As promised on the list [0], this series aims to backport 3 upstream
> commits [1,2,3] into 5.12-stable tree.
> 
> Patch #1 is already in the queue and therefore not included. Patch #2 can
> be applied now by manually adding the __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc
> macro (please review). Patch #3 can be applied cleanly then (after #2).
> 
> I've slightly tested it on my 920 (boot test and the whole kvm-unit-tests),
> on top of the latest linux-stable-rc/linux-5.12.y. Please consider taking
> them for 5.12-stable.
> 
> * From v1:
>   - Allocate a new number for __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc
>   - Collect Marc's R-b tags
> 
> [0] https://lore.kernel.org/r/0d9f123c-e9f7-7481-143d-efd488873082@huawei.com
> [1] https://git.kernel.org/torvalds/c/f5e30680616a
> [2] https://git.kernel.org/torvalds/c/26778aaa134a
> [3] https://git.kernel.org/torvalds/c/e3e880bb1518
> 
> Marc Zyngier (1):
>   KVM: arm64: Commit pending PC adjustemnts before returning to
>     userspace
> 
> Zenghui Yu (1):
>   KVM: arm64: Resolve all pending PC updates before immediate exit
> 
>  arch/arm64/include/asm/kvm_asm.h   |  1 +
>  arch/arm64/kvm/arm.c               | 20 +++++++++++++++++---
>  arch/arm64/kvm/hyp/exception.c     |  4 ++--
>  arch/arm64/kvm/hyp/nvhe/hyp-main.c |  8 ++++++++
>  4 files changed, 28 insertions(+), 5 deletions(-)
> 
> -- 
> 2.19.1
> 

All now queued up, thanks.,

greg k-h