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[34.140.232.180]) by smtp.gmail.com with ESMTPSA id v9-20020a5d43c9000000b0033ec9007bacsm2679247wrr.20.2024.03.22.12.15.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Mar 2024 12:15:14 -0700 (PDT) Date: Fri, 22 Mar 2024 19:15:11 +0000 From: Mostafa Saleh To: Jason Gunthorpe Cc: iommu@lists.linux.dev, Joerg Roedel , linux-arm-kernel@lists.infradead.org, Robin Murphy , Will Deacon , Eric Auger , Jean-Philippe Brucker , Moritz Fischer , Michael Shavit , Nicolin Chen , patches@lists.linux.dev, Shameerali Kolothum Thodi Subject: Re: [PATCH v5 09/27] iommu/arm-smmu-v3: Allocate the CD table entry in advance Message-ID: References: <0-v5-9a37e0c884ce+31e3-smmuv3_newapi_p2_jgg@nvidia.com> <9-v5-9a37e0c884ce+31e3-smmuv3_newapi_p2_jgg@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9-v5-9a37e0c884ce+31e3-smmuv3_newapi_p2_jgg@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240322_121517_770294_6500A17F X-CRM114-Status: GOOD ( 28.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgSmFzb24sCgpPbiBNb24sIE1hciAwNCwgMjAyNCBhdCAwNzo0Mzo1N1BNIC0wNDAwLCBKYXNv biBHdW50aG9ycGUgd3JvdGU6Cj4gQXZvaWQgYXJtX3NtbXVfYXR0YWNoX2RldigpIGhhdmluZyB0 byB1bmRvIHRoZSBjaGFuZ2VzIHRvIHRoZQo+IHNtbXVfZG9tYWluLT5kZXZpY2VzIGxpc3QsIGFj cXVpcmUgdGhlIGNkcHRyIGVhcmxpZXIgc28gd2UgZG9uJ3QgbmVlZCB0bwo+IGhhbmRsZSB0aGF0 IGVycm9yLgo+IAo+IE5vdyB0aGVyZSBpcyBhIGNsZWFyIGJyZWFrIGluIGFybV9zbW11X2F0dGFj aF9kZXYoKSB3aGVyZSBhbGwgdGhlCj4gcHJlcC13b3JrIGhhcyBiZWVuIGRvbmUgbm9uLWRpc3J1 cHRpdmVseSBhbmQgd2UgY29tbWl0IHRvIG1ha2luZyB0aGUgSFcKPiBjaGFuZ2UsIHdoaWNoIGNh bm5vdCBmYWlsLgo+IAo+IFRoaXMgY29tcGxldGVzIHRyYW5zZm9ybWluZyBhcm1fc21tdV9hdHRh Y2hfZGV2KCkgc28gdGhhdCBpdCBkb2VzIG5vdAo+IGRpc3R1cmIgdGhlIEhXIGlmIGl0IGZhaWxz Lgo+IAo+IFRlc3RlZC1ieTogTmljb2xpbiBDaGVuIDxuaWNvbGluY0BudmlkaWEuY29tPgo+IFNp Z25lZC1vZmYtYnk6IEphc29uIEd1bnRob3JwZSA8amdnQG52aWRpYS5jb20+Cj4gLS0tCj4gIGRy aXZlcnMvaW9tbXUvYXJtL2FybS1zbW11LXYzL2FybS1zbW11LXYzLmMgfCAyNCArKysrKysrLS0t LS0tLS0tLS0tLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDggaW5zZXJ0aW9ucygrKSwgMTYgZGVsZXRp b25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvaW9tbXUvYXJtL2FybS1zbW11LXYzL2Fy bS1zbW11LXYzLmMgYi9kcml2ZXJzL2lvbW11L2FybS9hcm0tc21tdS12My9hcm0tc21tdS12My5j Cj4gaW5kZXggMmRkNmNiMTcxMTJlOTguLjM5MDgxZDgyOGEyMTMyIDEwMDY0NAo+IC0tLSBhL2Ry aXZlcnMvaW9tbXUvYXJtL2FybS1zbW11LXYzL2FybS1zbW11LXYzLmMKPiArKysgYi9kcml2ZXJz L2lvbW11L2FybS9hcm0tc21tdS12My9hcm0tc21tdS12My5jCj4gQEAgLTI2NzYsNiArMjY3Niw3 IEBAIHN0YXRpYyBpbnQgYXJtX3NtbXVfYXR0YWNoX2RldihzdHJ1Y3QgaW9tbXVfZG9tYWluICpk b21haW4sIHN0cnVjdCBkZXZpY2UgKmRldikKPiAgCXN0cnVjdCBhcm1fc21tdV9kZXZpY2UgKnNt bXU7Cj4gIAlzdHJ1Y3QgYXJtX3NtbXVfZG9tYWluICpzbW11X2RvbWFpbiA9IHRvX3NtbXVfZG9t YWluKGRvbWFpbik7Cj4gIAlzdHJ1Y3QgYXJtX3NtbXVfbWFzdGVyICptYXN0ZXI7Cj4gKwlzdHJ1 Y3QgYXJtX3NtbXVfY2QgKmNkcHRyOwo+ICAKPiAgCWlmICghZndzcGVjKQo+ICAJCXJldHVybiAt RU5PRU5UOwo+IEBAIC0yNzA0LDYgKzI3MDUsMTIgQEAgc3RhdGljIGludCBhcm1fc21tdV9hdHRh Y2hfZGV2KHN0cnVjdCBpb21tdV9kb21haW4gKmRvbWFpbiwgc3RydWN0IGRldmljZSAqZGV2KQo+ ICAJaWYgKHJldCkKPiAgCQlyZXR1cm4gcmV0Owo+ICAKPiArCWlmIChzbW11X2RvbWFpbi0+c3Rh Z2UgPT0gQVJNX1NNTVVfRE9NQUlOX1MxKSB7Cj4gKwkJY2RwdHIgPSBhcm1fc21tdV9nZXRfY2Rf cHRyKG1hc3RlciwgSU9NTVVfTk9fUEFTSUQpOwo+ICsJCWlmICghY2RwdHIpCj4gKwkJCXJldHVy biAtRU5PTUVNOwo+ICsJfQo+ICsKPiAgCS8qCj4gIAkgKiBQcmV2ZW50IGFybV9zbW11X3NoYXJl X2FzaWQoKSBmcm9tIHRyeWluZyB0byBjaGFuZ2UgdGhlIEFTSUQKPiAgCSAqIG9mIGVpdGhlciB0 aGUgb2xkIG9yIG5ldyBkb21haW4gd2hpbGUgd2UgYXJlIHdvcmtpbmcgb24gaXQuCj4gQEAgLTI3 MjMsMTMgKzI3MzAsNiBAQCBzdGF0aWMgaW50IGFybV9zbW11X2F0dGFjaF9kZXYoc3RydWN0IGlv bW11X2RvbWFpbiAqZG9tYWluLCBzdHJ1Y3QgZGV2aWNlICpkZXYpCj4gIAlzd2l0Y2ggKHNtbXVf ZG9tYWluLT5zdGFnZSkgewo+ICAJY2FzZSBBUk1fU01NVV9ET01BSU5fUzE6IHsKPiAgCQlzdHJ1 Y3QgYXJtX3NtbXVfY2QgdGFyZ2V0X2NkOwo+IC0JCXN0cnVjdCBhcm1fc21tdV9jZCAqY2RwdHI7 Cj4gLQo+IC0JCWNkcHRyID0gYXJtX3NtbXVfZ2V0X2NkX3B0cihtYXN0ZXIsIElPTU1VX05PX1BB U0lEKTsKPiAtCQlpZiAoIWNkcHRyKSB7Cj4gLQkJCXJldCA9IC1FTk9NRU07Cj4gLQkJCWdvdG8g b3V0X2xpc3RfZGVsOwo+IC0JCX0KPiAgCj4gIAkJYXJtX3NtbXVfbWFrZV9zMV9jZCgmdGFyZ2V0 X2NkLCBtYXN0ZXIsIHNtbXVfZG9tYWluKTsKPiAgCQlhcm1fc21tdV93cml0ZV9jZF9lbnRyeSht YXN0ZXIsIElPTU1VX05PX1BBU0lELCBjZHB0ciwKPiBAQCAtMjc0NiwxNiArMjc0Niw4IEBAIHN0 YXRpYyBpbnQgYXJtX3NtbXVfYXR0YWNoX2RldihzdHJ1Y3QgaW9tbXVfZG9tYWluICpkb21haW4s IHN0cnVjdCBkZXZpY2UgKmRldikKPiAgCX0KPiAgCj4gIAlhcm1fc21tdV9lbmFibGVfYXRzKG1h c3Rlciwgc21tdV9kb21haW4pOwo+IC0JZ290byBvdXRfdW5sb2NrOwo+IC0KPiAtb3V0X2xpc3Rf ZGVsOgo+IC0Jc3Bpbl9sb2NrX2lycXNhdmUoJnNtbXVfZG9tYWluLT5kZXZpY2VzX2xvY2ssIGZs YWdzKTsKPiAtCWxpc3RfZGVsX2luaXQoJm1hc3Rlci0+ZG9tYWluX2hlYWQpOwo+IC0Jc3Bpbl91 bmxvY2tfaXJxcmVzdG9yZSgmc21tdV9kb21haW4tPmRldmljZXNfbG9jaywgZmxhZ3MpOwo+IC0K PiAtb3V0X3VubG9jazoKPiAgCW11dGV4X3VubG9jaygmYXJtX3NtbXVfYXNpZF9sb2NrKTsKPiAt CXJldHVybiByZXQ7Cj4gKwlyZXR1cm4gMDsKPiAgfQo+ICAKPiAgc3RhdGljIGludCBhcm1fc21t dV9hdHRhY2hfZGV2X3N0ZShzdHJ1Y3QgZGV2aWNlICpkZXYsCj4gLS0gCj4gMi40My4yCj4KSSBi ZWxpZXZlIHRoaXMgaXMgZmluZSwgSSBjb3VsZG7igJl0IGJyZWFrIGl0LiBXaXRoIHRoZSBjb21t ZW50IG9uIHRoZSBwcmV2aW91cwpwYXRjaCwgd2hlcmUgd2UgZXhwbGljaXRseSBhbGxvY2F0ZSB0 aGUgQ0QgaGVyZSBhbmQgbm90IGluc2lkZQphcm1fc21tdV9nZXRfY2RfcHRyKCkuCgpSZXZpZXdl ZC1ieTogTW9zdGFmYSBTYWxlaCA8c21vc3RhZmFAZ29vZ2xlLmNvbT4KCgpUaGFua3MsCk1vc3Rh ZmEKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4 LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFk Lm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFy bS1rZXJuZWwK