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11 Apr 2022 07:36:21 -0700 Message-ID: Date: Mon, 11 Apr 2022 07:36:26 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Content-Language: en-US To: "zhangfei.gao@foxmail.com" , Joerg Roedel , Fenghua Yu , jean-philippe References: <20220207230254.3342514-1-fenghua.yu@intel.com> <20220207230254.3342514-6-fenghua.yu@intel.com> <56ed509d-a7cf-1fde-676c-a28eb204989b@intel.com> From: Dave Hansen Subject: Re: [PATCH v4 05/11] iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit In-Reply-To: Cc: Ravi V Shankar , Tony Luck , Ashok Raj , Peter Zijlstra , x86 , linux-kernel , iommu , Ingo Molnar , Dave Hansen , Andy Lutomirski , Josh Poimboeuf , Borislav Petkov , Thomas Gleixner 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gNC8xMS8yMiAwNzoyMCwgemhhbmdmZWkuZ2FvQGZveG1haWwuY29tIHdyb3RlOgo+PiBJcyB0 aGVyZSBub3RoaW5nIGJlZm9yZSB0aGlzIGNhbGwgdHJhY2U/wqAgVXN1YWxseSB0aGVyZSB3aWxs IGJlIGF0IGxlYXN0Cj4+IHNvbWUgd2FybmluZyB0ZXh0Lgo+IEkgYWRkZWQgZHVtcF9zdGFjaygp IGluIGlvYXNpZF9mcmVlLgoKSG9sZCBvbiBhIHNlYywgdGhvdWdoLi4uCgpXaGF0J3MgdGhlICpw cm9ibGVtKiBoZXJlPyAgRGlkIHNvbWV0aGluZyBicmVhayBvciBhcmUgeW91IGp1c3Qgc2F5aW5n CnRoYXQgc29tZXRoaW5nIGxvb2tzIHdlaXJkIHRvIF95b3VfPwoKRm9yIGluc3RhbmNlLCBpZiB3 ZSBoYXZlOgoKCW5naW54OiBpb2FzaWRfYWxsb2MoKT09MQoJICAgICAgIGZvcmsoKTsgLy8gc3Bh d24gdGhlIGRhZW1vbgoJICAgICAgIGV4aXQoKTsKCSAgICAgICBpb2FzaWRfZnJlZSgxKTsKCmFu ZCB0aGVuIGEgbW9tZW50IGxhdGVyOgoKCWx5bng6ICBpb2FzaWRfYWxsb2MoKT09MQoJICAgICAg IGZvcmsoKTsKCSAgICAgICBleGl0KCk7CgkgICAgICAgaW9hc2lkX2ZyZWUoMSk7CgpUaGVyZSdz IG5vIHByb2JsZW0uICBUaGUgb3JpZ2luYWwgbmdpbnggcHJvY2VzcyB3aXRoIGlvYXNpZD09MSBl eGl0ZWQuClRoZSBmYWN0IHRoYXQgKnNvbWUqIHByb2Nlc3MgY2FsbGVkIG5naW54IGlzIHN0aWxs IHJ1bm5pbmcgZG9lc24ndCBtZWFuCnRoYXQgaXQgc3RpbGwgaGFzIGEgcmVmZXJlbmNlIHRvIGFz aWQ9PTEuCgpBcmUgeW91IHN1cmUgdGhlIG5naW54IHByb2Nlc3MgdGhhdCBhbGxvY2F0ZWQgdGhl IEFTSUQgaXMgdGhlIHNhbWUKcHJvY2VzcyB5b3Ugc2VlIGluIHBzPwpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVA bGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24u b3JnL21haWxtYW4vbGlzdGluZm8vaW9tbXU=