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Wed, 24 Nov 2021 10:33:20 -0800 (PST) Message-ID: <4bce6339-095f-a7cb-fb7c-436b8ece9588@arm.com> Date: Wed, 24 Nov 2021 18:33:15 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.3.2 Subject: Re: [PATCH 0/9] iommu: Refactor flush queues into iommu-dma Content-Language: en-GB To: John Garry , joro@8bytes.org, will@kernel.org References: <7f7daf42-8aff-b9ed-0f48-d4158896012e@huawei.com> From: Robin Murphy In-Reply-To: <7f7daf42-8aff-b9ed-0f48-d4158896012e@huawei.com> Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, willy@infradead.org 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" T24gMjAyMS0xMS0yNCAxNzoyMSwgSm9obiBHYXJyeSB3cm90ZToKPiBPbiAyMy8xMS8yMDIxIDE0 OjEwLCBSb2JpbiBNdXJwaHkgd3JvdGU6Cj4+IEFzIHByb21pc2VkLCB0aGlzIHNlcmllcyBjbGVh bnMgdXAgdGhlIGZsdXNoIHF1ZXVlIGNvZGUgYW5kIHN0cmVhbWxpbmVzCj4+IGl0IGRpcmVjdGx5 IGludG8gaW9tbXUtZG1hLiBTaW5jZSB3ZSBubyBsb25nZXIgaGF2ZSBwZXItZHJpdmVyIERNQSBv cHMKPj4gaW1wbGVtZW50YXRpb25zLCBhIGxvdCBvZiB0aGUgYWJzdHJhY3Rpb24gaXMgbm93IG5v IGxvbmdlciBuZWNlc3NhcnksIHNvCj4+IHRoZXJlJ3MgYSBuaWNlIGRlZ3JlZSBvZiBzaW1wbGlm aWNhdGlvbiBpbiB0aGUgcHJvY2Vzcy4gVW4tYWJzdHJhY3RpbmcKPj4gdGhlIHF1ZXVlZCBwYWdl IGZyZWVpbmcgbWVjaGFuaXNtIGlzIGFsc28gdGhlIHBlcmZlY3Qgb3Bwb3J0dW5pdHkgdG8KPj4g cmV2aXNlIHdoaWNoIHN0cnVjdCBwYWdlIGZpZWxkcyB3ZSB1c2Ugc28gd2UgY2FuIGJlIGJldHRl ci1iZWhhdmVkCj4+IGZyb20gdGhlIE1NIHBvaW50IG9mIHZpZXcsIHRoYW5rcyB0byBNYXR0aGV3 Lgo+Pgo+PiBUaGVzZSBjaGFuZ2VzIHNob3VsZCBhbHNvIG1ha2UgaXQgdmlhYmxlIHRvIHN0YXJ0 IHVzaW5nIHRoZSBnYXRoZXIKPj4gZnJlZWxpc3QgaW4gaW8tcGd0YWJsZS1hcm0sIGFuZCBlbGlt aW5hdGUgc29tZSBtb3JlIHN5bmNocm9ub3VzCj4+IGludmFsaWRhdGlvbnMgZnJvbSB0aGUgbm9y bWFsIGZsb3cgdGhlcmUsIGJ1dCB0aGF0IGlzIHByb3ZpbmcgdG8gbmVlZCBhCj4+IGJpdCBtb3Jl IGNhcmVmdWwgdGhvdWdodCB0aGFuIEkgaGF2ZSB0aW1lIGZvciBpbiB0aGlzIGN5Y2xlLCBzbyBJ J3ZlCj4+IHBhcmtlZCB0aGF0IGFnYWluIGZvciBub3cgYW5kIHdpbGwgcmV2aXNpdCBpdCBpbiB0 aGUgbmV3IHllYXIuCj4+Cj4+IEZvciBjb252ZW5pZW5jZSwgYnJhbmNoIGF0Ogo+PiDCoMKgIGh0 dHBzOi8vZ2l0bGFiLmFybS5jb20vbGludXgtYXJtL2xpbnV4LXJtLy0vdHJlZS9pb21tdS9pb3Zh Cj4+Cj4+IEkndmUgYnVpbGQtdGVzdGVkIGZvciB4ODZfNjQsIGFuZCBib290LXRlc3RlZCBhcm02 NCB0byB0aGUgcG9pbnQgb2YKPj4gY29uZmlybWluZyB0aGF0IHB1dF9wYWdlc19saXN0KCkgZ2V0 cyBwYXNzZWQgYSB2YWxpZCBlbXB0eSBsaXN0IHdoZW4KPj4gZmx1c2hpbmcsIHdoaWxlIGV2ZXJ5 dGhpbmcgZWxzZSBzdGlsbCB3b3Jrcy4KPiBNeSBpbnRlcmVzdCBpcyBpbiBwYXRjaGVzIDIsIDMs IDcsIDgsIDksIGFuZCB0aGV5IGxvb2sgb2suIEkgZGlkIGEgYml0IAo+IG9mIHRlc3RpbmcgZm9y IHN0cmljdCBhbmQgbm9uLXN0cmljdCBtb2RlIG9uIG15IGFybTY0IHN5c3RlbSBhbmQgbm8gCj4g cHJvYmxlbXMuCj4gCj4gQXBhcnQgZnJvbSB0aGlzLCBJIG5vdGljZWQgdGhhdCBvbmUgcG9zc2li bGUgb3B0aW1pemF0aW9uIGNvdWxkIGJlIHRvIAo+IGF2b2lkIHNvIG1hbnkgcmVhZHMgb2YgZnFf Zmx1c2hfZmluaXNoX2NudCwgYXMgd2Ugc2VlbSB0byBoYXZlIGEgcGF0dGVybiAKPiBvZiBmcV9m bHVzaF9pb3RsYigpLT5hdG9taWM2NF9pbmMoZnFfZmx1c2hfZmluaXNoX2NudCkgZm9sbG93ZWQg YnkgYSAKPiByZWFkIG9mIGZxX2ZsdXNoX2ZpbmlzaF9jbnQgaW4gZnFfcmluZ19mcmVlKCksIHNv IHdlIGNvdWxkIHVzZSAKPiBhdG9taWM2NF9pbmNfcmV0dXJuKGZxX2ZsdXNoX2ZpbmlzaF9jbnQp IGFuZCByZXVzZSB0aGUgdmFsdWUuIEkgdGhpbmsgCj4gdGhhdCBhbnkgcmFjaW5nIGluIGZxX2Zs dXNoX2ZpbmlzaF9jbnQgYWNjZXNzZXMgYXJlIGxhdGVudCwgYnV0IG1heWJlIAo+IHRoZXJlIGlz IGEgZmxhdyBpbiB0aGlzLiBIb3dldmVyIEkgdHJpZWQgc29tZXRoaW5nIGFsb25nIHRoZXNlIGxp bmVzIGFuZCAKPiBnb3QgYSAyLjQlIHRocm91Z2hwdXQgZ2FpbiBmb3IgbXkgc3RvcmFnZSBzY2Vu YXJpby4KClllcywgdGhhdCBzb3VuZHMgcmVhc29uYWJsZSAtIG9mZi1oYW5kIEkgY2FuJ3Qgc2Vl IHRoYXQgdGhlcmUncyBhbnkgbW9yZSAKcG90ZW50aWFsIGZvciBoYXJtZnVsIHJhY2VzIGVpdGhl ci4gQWxsIHRoYXQganVtcHMgb3V0IGlzIHRoZSBjYXNlIHdoZXJlIAp0aGUgZmx1c2ggY291bnQg Z2V0cyBidW1wZWQgdmlhIHF1ZXVlX2lvdmEoKSB3aGlsZSBhbm90aGVyIENQVSBpcyAKYWxyZWFk eSBydW5uaW5nIGZxX2ZsdXNoX3RpbWVvdXQoKSwgd2hlcmUgZnJlZWluZyBuZXdlciBJT1ZBcyBh ZGRlZCAKc2luY2UgdGhlIHRpbWVvdXQgaXMgdGhlbiBtb3JlIGxpa2VseSB0byBiZSBsZWZ0IHRv IHRoZSBsb2NhbCBDUFUsIG9yIApwb3N0cG9uZWQgdW50aWwgdGhlIG5leHQgZmx1c2ggY3ljbGUg ZW50aXJlbHksIHJhdGhlciB0aGFuIGJlaW5nIHBpbGVkIApvbiB0byB0aGUgZ3V5IGFscmVhZHkg cHJvY2Vzc2luZyB0aGUgZm9yX2VhY2hfcG9zc2libGVfY3B1KCkgbG9vcC4gQW5kIEkgCmNhbid0 IGhlbHAgdGhpbmtpbmcgdGhhdCBjb3VsZCBvbmx5IGJlIGEgKmdvb2QqIHRoaW5nLCBnaXZlbiBo b3cgdGhlIEZRIAp0aW1lb3V0IHNlZW1zIHRvIGJlIGEgc21va2luZyBndW4gaW4geW91ciAicGVy Zm9ybWFuY2UgbmV2ZXIgcmVjb3ZlcnMgCmFmdGVyIGZhbGxpbmcgb2ZmIHRoZSBjbGlmZiIgc2Nl bmFyaW8gOikKClJvYmluLgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlvbi5v cmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vaW9t bXU=