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Tue, 21 Aug 2018 01:42:22 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7L1gLEb024626 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Aug 2018 01:42:22 GMT Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w7L1gIrM004315; Tue, 21 Aug 2018 01:42:19 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 20 Aug 2018 18:42:18 -0700 Subject: Re: [Xen-devel] [PATCH v4 12/16] x86/xen: enable Hygon support to Xen To: Pu Wen , tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, thomas.lendacky@amd.com, bp@alien8.de, pbonzini@redhat.com, jgross@suse.com, JBeulich@suse.com Cc: linux-arch@vger.kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org References: <044e5e9082d57c10a36a16a9da6404f976d7ae55.1534599097.git.puwen@hygon.cn> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <044e5e9082d57c10a36a16a9da6404f976d7ae55.1534599097.git.puwen@hygon.cn> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8991 signatures=668707 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=18 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808210015 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/19/2018 12:13 PM, Pu Wen wrote: > To make Xen works functionly on Hygon platforms, reuse AMD's Xen support > code path for Hygon. > > There are six core performance events counters per thread, so there are > six MSRs for these counters(0-5). Also there are four legacy PMC MSRs, > they are alias of the counters(0-3). > > In this version of kernel Hygon use the lagacy and safe versions of MSR > access. It works fine when VPMU enabled in Xen on Hygon platforms by > testing with perf. > > Signed-off-by: Pu Wen Reviewed-by: Boris Ostrovsky