linux-kernel - Re: [PATCH 1/6] s390/alternative: use a copy of the facility bit mask

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Message-ID: <20180117152413.312ee2fe.cohuck@redhat.com>
Date:   Wed, 17 Jan 2018 15:24:13 +0100
From:   Cornelia Huck <cohuck@...hat.com>
To:     Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org, Heiko Carstens <heiko.carstens@...ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jon Masters <jcm@...hat.com>,
        Marcus Meissner <meissner@...e.de>,
        Jiri Kosina <jkosina@...e.cz>
Subject: Re: [PATCH 1/6] s390/alternative: use a copy of the facility bit
 mask

On Wed, 17 Jan 2018 10:48:34 +0100
Martin Schwidefsky <schwidefsky@...ibm.com> wrote:

> To be able to switch off specific CPU alternatives with kernel parameters
> make a copy of the facility bit mask provided by STFLE and use the copy
> for the decision to apply an alternative.
> 
> Reviewed-by: Christian Borntraeger <borntraeger@...ibm.com>
> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
> ---
>  arch/s390/include/asm/facility.h | 18 ++++++++++++++++++
>  arch/s390/include/asm/lowcore.h  |  3 ++-
>  arch/s390/kernel/alternative.c   |  3 ++-
>  arch/s390/kernel/early.c         |  3 +++
>  arch/s390/kernel/setup.c         |  4 +++-
>  arch/s390/kernel/smp.c           |  4 +++-
>  6 files changed, 31 insertions(+), 4 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@...hat.com>