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Wed, 27 May 2020 23:47:09 -0700 (PDT) Received: from [10.140.6.42] ([45.135.186.12]) by smtp.gmail.com with ESMTPSA id 188sm3707241pfu.165.2020.05.27.23.46.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 May 2020 23:47:09 -0700 (PDT) Subject: Re: [PATCH 0/2] Introduce PCI_FIXUP_IOMMU To: Bjorn Helgaas References: <20200527181842.GA256680@bjorn-Precision-5520> From: Zhangfei Gao Message-ID: <83bd3d72-3a0c-d9b6-54ad-5bc0dbc5be7d@linaro.org> Date: Thu, 28 May 2020 14:46:54 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200527181842.GA256680@bjorn-Precision-5520> Content-Language: en-US Cc: jean-philippe , Herbert Xu , Arnd Bergmann , linux-pci@vger.kernel.org, Greg Kroah-Hartman , Hanjun Guo , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-acpi@vger.kernel.org, linux-crypto@vger.kernel.org, Sudeep Holla , Bjorn Helgaas , kenneth-lee-2012@foxmail.com, linux-arm-kernel@lists.infradead.org, Len Brown 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" SGksIEJqb3JuCgpPbiAyMDIwLzUvMjgg5LiK5Y2IMjoxOCwgQmpvcm4gSGVsZ2FhcyB3cm90ZToK PiBPbiBUdWUsIE1heSAyNiwgMjAyMCBhdCAwNzo0OTowN1BNICswODAwLCBaaGFuZ2ZlaSBHYW8g d3JvdGU6Cj4+IFNvbWUgcGxhdGZvcm0gZGV2aWNlcyBhcHBlYXIgYXMgUENJIGJ1dCBhcmUgYWN0 dWFsbHkgb24gdGhlIEFNQkEgYnVzLAo+PiBhbmQgdGhleSBuZWVkIGZpeHVwIGluIGRyaXZlcnMv cGNpL3F1aXJrcy5jIGhhbmRsaW5nIGlvbW11X2Z3bm9kZS4KPj4gSGVyZSBpbnRyb2R1Y2luZyBQ Q0lfRklYVVBfSU9NTVUsIHdoaWNoIGlzIGNhbGxlZCBhZnRlciBpb21tdV9md25vZGUKPj4gaXMg YWxsb2NhdGVkLCBpbnN0ZWFkIG9mIHJldXNpbmcgUENJX0ZJWFVQX0ZJTkFMIHNpbmNlIGl0IHdp bGwgc2xvdwo+PiBkb3duIGlvbW11IHByb2JpbmcgYXMgYWxsIGRldmljZXMgaW4gZml4dXAgZmlu YWwgbGlzdCB3aWxsIGJlCj4+IHJlcHJvY2Vzc2VkLCBzdWdnZXN0ZWQgYnkgSm9lcmcsIFsxXQo+ IElzIHRoaXMgc2xvd2Rvd24gc2lnbmlmaWNhbnQ/ICBXZSBhbHJlYWR5IGl0ZXJhdGUgb3ZlciBl dmVyeSBkZXZpY2UKPiB3aGVuIGFwcGx5aW5nIFBDSV9GSVhVUF9GSU5BTCBxdWlya3MsIHNvIGlm IHdlIHVzZWQgdGhlIGV4aXN0aW5nCj4gUENJX0ZJWFVQX0ZJTkFMLCB3ZSB3b3VsZG4ndCBiZSBh ZGRpbmcgYSBuZXcgbG9vcC4gIFdlIHdvdWxkIG9ubHkgYmUKPiBhZGRpbmcgdHdvIG1vcmUgaXRl cmF0aW9ucyB0byB0aGUgbG9vcCBpbiBwY2lfZG9fZml4dXBzKCkgdGhhdCB0cmllcwo+IHRvIG1h dGNoIHF1aXJrcyBhZ2FpbnN0IHRoZSBjdXJyZW50IGRldmljZS4gIEkgZG91YnQgdGhhdCB3b3Vs ZCBiZSBhCj4gbWVhc3VyYWJsZSBzbG93ZG93bi4KSSBkbyBub3Qgbm90aWNlIHRoZSBkaWZmZXJl bmNlIHdoZW4gY29tcGFyZWQgZml4dXBfaW9tbXUgYW5kIGZpeHVwX2ZpbmFsIAp2aWEgZ2V0X2pp ZmZpZXNfNjQsCnNpbmNlIGluIG91ciBwbGF0Zm9ybSBubyBvdGhlciBwY2kgZml4dXAgaXMgcmVn aXN0ZXJlZC4KCkhlcmUgdGhlIHBsYW4gaXMgYWRkaW5nIHBjaV9maXh1cF9kZXZpY2UgaW4gaW9t bXVfZndzcGVjX2luaXQsCnNvIGlmIHVzaW5nIGZpeHVwX2ZpbmFsIHRoZSBpdGVyYXRpb24gd2ls bCBiZSBkb25lIGFnYWluIGhlcmUuCgo+Cj4+IEZvciBleGFtcGxlOgo+PiBIaXNpbGljb24gcGxh dGZvcm0gZGV2aWNlIG5lZWQgZml4dXAgaW4KPj4gZHJpdmVycy9wY2kvcXVpcmtzLmMgaGFuZGxp bmcgZndzcGVjLT5jYW5fc3RhbGwsIHdoaWNoIGlzIGludHJvZHVjZWQgaW4gWzJdCj4+Cj4+ICtz dGF0aWMgdm9pZCBxdWlya19odWF3ZWlfcGNpZV9zdmEoc3RydWN0IHBjaV9kZXYgKnBkZXYpCj4+ ICt7Cj4+ICsgICAgc3RydWN0IGlvbW11X2Z3c3BlYyAqZndzcGVjOwo+PiArCj4+ICsgICAgcGRl di0+ZWV0bHBfcHJlZml4X3BhdGggPSAxOwo+PiArICAgIGZ3c3BlYyA9IGRldl9pb21tdV9md3Nw ZWNfZ2V0KCZwZGV2LT5kZXYpOwo+PiArICAgIGlmIChmd3NwZWMpCj4+ICsgICAgICAgIGZ3c3Bl Yy0+Y2FuX3N0YWxsID0gMTsKPj4gK30KPj4gKwo+PiArREVDTEFSRV9QQ0lfRklYVVBfSU9NTVUo UENJX1ZFTkRPUl9JRF9IVUFXRUksIDB4YTI1MCwgcXVpcmtfaHVhd2VpX3BjaWVfc3ZhKTsKPj4g K0RFQ0xBUkVfUENJX2lGSVhVUF9JT01NVShQQ0lfVkVORE9SX0lEX0hVQVdFSSwgMHhhMjUxLCBx dWlya19odWF3ZWlfcGNpZV9zdmEpOwo+Pgo+PiBbMV0gaHR0cHM6Ly93d3cuc3Bpbmljcy5uZXQv bGlzdHMvaW9tbXUvbXNnNDQ1OTEuaHRtbAo+PiBbMl0gaHR0cHM6Ly93d3cuc3Bpbmljcy5uZXQv bGlzdHMvbGludXgtcGNpL21zZzk0NTU5Lmh0bWwKPiBJZiB5b3UgcmVmZXJlbmNlIHRoZXNlIGlu IHRoZSBjb21taXQgbG9ncywgcGxlYXNlIHVzZSBsb3JlLmtlcm5lbC5vcmcKPiBsaW5rcyBpbnN0 ZWFkIG9mIHNwaW5pY3MuCkdvdCBpdCwgdGhhbmtzIEJqb3JuLgoKCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVA bGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24u b3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=