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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id x17sm5298087ilm.40.2021.02.26.13.55.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 26 Feb 2021 13:55:17 -0800 (PST) Subject: Re: [PATCH] iommu/amd: Fix event counter availability check To: Paul Menzel , Alexander Monakov , Suravee Suthikulpanit References: <20200529200738.1923-1-amonakov@ispras.ru> <4aba4c61-1878-3d4e-d52e-3ccac9715010@molgen.mpg.de> From: Shuah Khan Message-ID: Date: Fri, 26 Feb 2021 14:55:16 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <4aba4c61-1878-3d4e-d52e-3ccac9715010@molgen.mpg.de> Content-Language: en-US Cc: David Coe , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Shuah Khan , "Tj \(Elloe Linux\)" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMi8yNi8yMSAyOjQ0IFBNLCBQYXVsIE1lbnplbCB3cm90ZToKPiBbY2M6ICtzdXJhdmVlLCAr asO2cmddCj4gCj4gRGVhciBBbGV4LCBkZWFyIFNodWFoLCBkZWFyIFN1cmF2ZWUsIGRlYXIgSsO2 cmcsCj4gCj4gCj4gQW0gMDMuMDYuMjAgdW0gMDg6NTQgc2NocmllYiBBbGV4YW5kZXIgTW9uYWtv djoKPj4gT24gVHVlLCAyIEp1biAyMDIwLCBTaHVhaCBLaGFuIHdyb3RlOgo+Pgo+Pj4gSSBjaGFu Z2VkIHRoZSBsb2dpYyB0byByZWFkIGNvbmZpZyB0byBnZXQgbWF4IGJhbmtzIGFuZCBjb3VudGVy cwo+Pj4gYmVmb3JlIGNoZWNraW5nIGlmIGNvdW50ZXJzIGFyZSB3cml0YWJsZSBhbmQgdHJpZWQg d3JpdGluZyB0byBhbGwuCj4+PiBUaGUgcmVzdWx0IGlzIHRoZSBzYW1lIGFuZCBhbGwgb2YgdGhl bSBhcmVuJ3Qgd3JpdGFibGUuIEhvd2V2ZXIsCj4+PiB3aGVuIGRpc2FibGUgdGhlIHdyaXRhYmxl IGNoZWNrIGFuZCBhc3N1bWUgdGhleSBhcmUsIEkgY2FuIHJ1bgo+PiBbc25pcF0KPj4KPj4gVGhp cyBpcyBzaW1pbGFyIHRvIHdoYXQgSSBkaWQuIEkgYWxzbyBub3RpY2VkIHRoYXQgY291bnRlcnMg Y2FuCj4+IGJlIHN1Y2Nlc3NmdWxseSB1c2VkIHdpdGggcGVyZiBpZiB0aGUgaW5pdGlhbCBjaGVj ayBpcyBpZ25vcmVkLgo+PiBJIHdhcyBjb25zaWRlcmluZyBzZW5kaW5nIGEgcGF0Y2ggdG8gcmVt b3ZlIHRoZSBjaGVjayBhbmQgYWRqdXN0Cj4+IHRoZSBldmVudCBjb3VudGluZyBsb2dpYyB0byB1 c2UgY291bnRlcnMgYXMgcmVhZC1vbmx5LCBidXQgYWZ0ZXIKPj4gYSBiaXQgbW9yZSBpbnZlc3Rp Z2F0aW9uIEkndmUgbm90aWNlZCBob3cgbGF0ZSBwY2lfZW5hYmxlX2RldmljZQo+PiBpcyBkb25l LCBhbmQgY2FtZSB1cCB3aXRoIHRoaXMgcGF0Y2guIEl0J3MgYSBwYXRoIG9mIGxlc3MgcmVzaXN0 YW5jZToKPj4gSSdkIGV4cGVjdCBtYWludGFpbmVycyB0byBiZSBtb3JlIGF2ZXJzZSB0byByZW1v dmluZyB0aGUgY2hlY2sKPj4gcmF0aGVyIHRoYW4gZml4aW5nIGl0IHNvIGl0IHdvcmtzIGFzIGlu dGVuZGVkIChldmVuIHRob3VnaCBJIHRoaW5rCj4+IHRoZSBjaGVjayBzaG91bGQgbm90IGJlIHRo ZXJlIGluIHRoZSBmaXJzdCBwbGFjZSkuCj4+Cj4+IEhvd2V2ZXI6Cj4+Cj4+IFRoZSBhYmlsaXR5 IHRvIG1vZGlmeSB0aGUgY291bnRlcnMgaXMgbmVlZGVkIG9ubHkgZm9yIHNhbXBsaW5nIHRoZQo+ PiBldmVudHMgKGdldHRpbmcgYW4gaW50ZXJydXB0IHdoZW4gYSBjb3VudGVyIG92ZXJmbG93cyku IFRoZXJlJ3Mgbm8KPj4gY29kZSB0byBkbyB0aGF0IGZvciB0aGVzZSBBTUQgSU9NTVUgY291bnRl cnMuIEEgc29sdXRpb24gSSB3b3VsZAo+PiBwcmVmZXIgaXMgdG8gbm90IHdyaXRlIHRvIHRob3Nl IGNvdW50ZXJzIGF0IGFsbC4gSXQgd291bGQgc2ltcGxpZnkgb3IKPj4gZXZlbiByZW1vdmUgYSBi dW5jaCBvZiBjb2RlLiBJIGNhbiBzdWJtaXQgYSBjb3JyZXNwb25kaW5nIHBhdGNoIGlmCj4+IHRo ZXJlJ3MgZ2VuZXJhbCBhZ3JlZW1lbnQgdGhpcyBwYXRoIGlzIG9rLgo+Pgo+PiBXaGF0IGRvIHlv dSB0aGluaz8KPiAKPiBJIGxpa2UgdGhpcyBpZGVhLiBTdXJhdmVlLCBKw7ZyZywgd2hhdCBkbyB5 b3UgdGhpbms/Cj4gCj4gQ29tbWl0IDY3NzhmZjViMjFiIChpb21tdS9hbWQ6IEZpeCBwZXJmb3Jt YW5jZSBjb3VudGVyIGluaXRpYWxpemF0aW9uKSAKPiBkZWxheXMgdGhlIGJvb3QgdXAgdG8gMTAw IG1zLCB3aGljaCBpcyBvdmVyIDIwICUgb24gZmFzdCBzeXN0ZW1zLCBhbmQgCj4gYWxzbyBqdXN0 IGEgd29ya2Fyb3VuZCwgYW5kIGRvZXMgbm90IHNlZW0gdG8gd29yayBhbHdheXMuIFRoZSBkZWxh eSBpcyAKPiBhbHNvIG5vdCBtZW50aW9uZWQgaW4gdGhlIGNvbW1pdCBtZXNzYWdlLgo+IAo+CgpT b3VuZHMgZ29vZCB0byBtZS4gSSBjYW4gdGVzdCB0aGlzIG91dCBvbiBteSBzeXN0ZW0uCgp0aGFu a3MsCi0tIFNodWFoCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcK aHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=