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[91.12.97.4]) by smtp.gmail.com with ESMTPSA id l5sm9908011wrc.90.2021.08.06.00.26.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Aug 2021 00:26:12 -0700 (PDT) To: Claudio Imbrenda , kvm@vger.kernel.org Cc: cohuck@redhat.com, borntraeger@de.ibm.com, frankja@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Ulrich.Weigand@de.ibm.com References: <20210804154046.88552-1-imbrenda@linux.ibm.com> <20210804154046.88552-2-imbrenda@linux.ibm.com> From: David Hildenbrand Organization: Red Hat Subject: Re: [PATCH v3 01/14] KVM: s390: pv: add macros for UVC CC values Message-ID: Date: Fri, 6 Aug 2021 09:26:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210804154046.88552-2-imbrenda@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04.08.21 17:40, Claudio Imbrenda wrote: > Add macros to describe the 4 possible CC values returned by the UVC > instruction. > > Signed-off-by: Claudio Imbrenda > --- > arch/s390/include/asm/uv.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h > index 12c5f006c136..b35add51b967 100644 > --- a/arch/s390/include/asm/uv.h > +++ b/arch/s390/include/asm/uv.h > @@ -18,6 +18,11 @@ > #include > #include > > +#define UVC_CC_OK 0 > +#define UVC_CC_ERROR 1 > +#define UVC_CC_BUSY 2 > +#define UVC_CC_PARTIAL 3 > + > #define UVC_RC_EXECUTED 0x0001 > #define UVC_RC_INV_CMD 0x0002 > #define UVC_RC_INV_STATE 0x0003 > Do we have any users we could directly fix up? AFAIKs, most users don't really care about the cc value, only about cc vs !cc. The only instances I was able to spot quickly: diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index 12c5f006c136..dd72d325f9e8 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -233,7 +233,7 @@ static inline int uv_call(unsigned long r1, unsigned long r2) do { cc = __uv_call(r1, r2); - } while (cc > 1); + } while (cc >= UVC_CC_BUSY); return cc; } @@ -245,7 +245,7 @@ static inline int uv_call_sched(unsigned long r1, unsigned long r2) do { cc = __uv_call(r1, r2); cond_resched(); - } while (cc > 1); + } while (cc >= UVC_CC_BUSY); return cc; } Of course, we could replace all checks for cc vs !cc with "cc != UVC_CC_OK" vs "cc == UVC_CC_OK". -- Thanks, David / dhildenb