From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Claudio Imbrenda <imbrenda@linux.ibm.com>, linux-kernel@vger.kernel.org
Cc: frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com,
kvm@vger.kernel.org, linux-s390@vger.kernel.org,
stable@vger.kernel.org, Thomas Huth <thuth@redhat.com>
Subject: Re: [PATCH v2 1/2] s390/kvm: split kvm_s390_real_to_abs
Date: Tue, 23 Mar 2021 16:01:54 +0100 [thread overview]
Message-ID: <7965aef3-9441-6d2e-909f-a3733992425f@de.ibm.com> (raw)
In-Reply-To: <20210322140559.500716-2-imbrenda@linux.ibm.com>
On 22.03.21 15:05, Claudio Imbrenda wrote:
> A new function _kvm_s390_real_to_abs will apply prefixing to a real address
> with a given prefix value.
>
> The old kvm_s390_real_to_abs becomes now a wrapper around the new function.
>
> This is needed to avoid code duplication in vSIE.
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
> ---
> arch/s390/kvm/gaccess.h | 23 +++++++++++++++++------
> 1 file changed, 17 insertions(+), 6 deletions(-)
>
> diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
> index daba10f76936..7c72a5e3449f 100644
> --- a/arch/s390/kvm/gaccess.h
> +++ b/arch/s390/kvm/gaccess.h
> @@ -18,17 +18,14 @@
>
> /**
> * kvm_s390_real_to_abs - convert guest real address to guest absolute address
> - * @vcpu - guest virtual cpu
> + * @prefix - guest prefix
> * @gra - guest real address
> *
> * Returns the guest absolute address that corresponds to the passed guest real
> - * address @gra of a virtual guest cpu by applying its prefix.
> + * address @gra of by applying the given prefix.
> */
> -static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
> - unsigned long gra)
> +static inline unsigned long _kvm_s390_real_to_abs(u32 prefix, unsigned long gra)
> {
> - unsigned long prefix = kvm_s390_get_prefix(vcpu);
> -
> if (gra < 2 * PAGE_SIZE)
> gra += prefix;
> else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
> @@ -36,6 +33,20 @@ static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
> return gra;
> }
>
> +/**
> + * kvm_s390_real_to_abs - convert guest real address to guest absolute address
> + * @vcpu - guest virtual cpu
> + * @gra - guest real address
> + *
> + * Returns the guest absolute address that corresponds to the passed guest real
> + * address @gra of a virtual guest cpu by applying its prefix.
> + */
> +static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
> + unsigned long gra)
> +{
> + return _kvm_s390_real_to_abs(kvm_s390_get_prefix(vcpu), gra);
> +}
> +
> /**
> * _kvm_s390_logical_to_effective - convert guest logical to effective address
> * @psw: psw of the guest
>
next prev parent reply other threads:[~2021-03-23 15:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 14:05 [PATCH v2 0/2] s390/kvm: VSIE: fix prefixing and MSO for MVPG Claudio Imbrenda
2021-03-22 14:05 ` [PATCH v2 1/2] s390/kvm: split kvm_s390_real_to_abs Claudio Imbrenda
2021-03-23 15:01 ` Christian Borntraeger [this message]
2021-03-22 14:05 ` [PATCH v2 2/2] s390/kvm: VSIE: fix MVPG handling for prefixing and MSO Claudio Imbrenda
2021-03-23 10:50 ` David Hildenbrand
2021-03-23 15:07 ` Christian Borntraeger
2021-03-23 15:11 ` David Hildenbrand
2021-03-23 15:16 ` Christian Borntraeger
2021-03-23 15:17 ` David Hildenbrand
2021-03-23 15:21 ` Claudio Imbrenda
2021-03-23 15:34 ` Christian Borntraeger
2021-03-23 10:49 ` [PATCH v2 0/2] s390/kvm: VSIE: fix prefixing and MSO for MVPG Christian Borntraeger
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