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Tue, 20 Apr 2021 18:48:06 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5387EAE051; Tue, 20 Apr 2021 18:48:06 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.171.21.211]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 20 Apr 2021 18:48:06 +0000 (GMT) Subject: Re: [PATCH v3 1/9] context_tracking: Move guest exit context tracking to separate helpers To: Sean Christopherson , Paolo Bonzini Cc: Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Michael Tokarev References: <20210415222106.1643837-1-seanjc@google.com> <20210415222106.1643837-2-seanjc@google.com> From: Christian Borntraeger Message-ID: Date: Tue, 20 Apr 2021 20:48:05 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 MIME-Version: 1.0 In-Reply-To: <20210415222106.1643837-2-seanjc@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: NHQywQPkFYycgixdgPptEWZJ73P_hQmm X-Proofpoint-ORIG-GUID: P-9eNqp9njeoLKOJDDPvoZGRIBM6bC8T X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-04-20_08:2021-04-20,2021-04-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 adultscore=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 malwarescore=0 clxscore=1015 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104200127 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 16.04.21 00:20, Sean Christopherson wrote: > From: Wanpeng Li > > Provide separate context tracking helpers for guest exit, the standalone > helpers will be called separately by KVM x86 in later patches to fix > tick-based accounting. > > Suggested-by: Thomas Gleixner > Cc: Thomas Gleixner > Cc: Sean Christopherson > Cc: Michael Tokarev > Cc: Christian Borntraeger > Signed-off-by: Wanpeng Li > Co-developed-by: Sean Christopherson > Signed-off-by: Sean Christopherson Reviewed-by: Christian Borntraeger > --- > include/linux/context_tracking.h | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h > index bceb06498521..200d30cb3a82 100644 > --- a/include/linux/context_tracking.h > +++ b/include/linux/context_tracking.h > @@ -131,10 +131,15 @@ static __always_inline void guest_enter_irqoff(void) > } > } > > -static __always_inline void guest_exit_irqoff(void) > +static __always_inline void context_tracking_guest_exit_irqoff(void) > { > if (context_tracking_enabled()) > __context_tracking_exit(CONTEXT_GUEST); > +} > + > +static __always_inline void guest_exit_irqoff(void) > +{ > + context_tracking_guest_exit_irqoff(); > > instrumentation_begin(); > if (vtime_accounting_enabled_this_cpu()) > @@ -159,6 +164,8 @@ static __always_inline void guest_enter_irqoff(void) > instrumentation_end(); > } > > +static __always_inline void context_tracking_guest_exit_irqoff(void) { } > + > static __always_inline void guest_exit_irqoff(void) > { > instrumentation_begin(); >