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([2a02:908:1252:fb60:49f7:8b5a:d7ab:5e3e]) by smtp.gmail.com with ESMTPSA id w13sm1627636edx.80.2021.04.29.00.09.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Apr 2021 00:09:14 -0700 (PDT) Subject: Re: [PATCH v5 07/27] drm/amdgpu: Remap all page faults to per process dummy page. To: Andrey Grodzovsky , dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-pci@vger.kernel.org, daniel.vetter@ffwll.ch, Harry.Wentland@amd.com References: <20210428151207.1212258-1-andrey.grodzovsky@amd.com> <20210428151207.1212258-8-andrey.grodzovsky@amd.com> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: Date: Thu, 29 Apr 2021 09:09:13 +0200 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: <20210428151207.1212258-8-andrey.grodzovsky@amd.com> Content-Language: en-US X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexander.Deucher@amd.com, gregkh@linuxfoundation.org, helgaas@kernel.org, Felix.Kuehling@amd.com Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" QW0gMjguMDQuMjEgdW0gMTc6MTEgc2NocmllYiBBbmRyZXkgR3JvZHpvdnNreToKPiBPbiBkZXZp Y2UgcmVtb3ZhbCByZXJvdXRlIGFsbCBDUFUgbWFwcGluZ3MgdG8gZHVtbXkgcGFnZQo+IHBlciBk cm1fZmlsZSBpbnN0YW5jZSBvciBpbXBvcnRlZCBHRU0gb2JqZWN0Lgo+Cj4gdjQ6Cj4gVXBkYXRl IGZvciBtb2RpZmllZCB0dG1fYm9fdm1fZHVtbXlfcGFnZQo+Cj4gU2lnbmVkLW9mZi1ieTogQW5k cmV5IEdyb2R6b3Zza3kgPGFuZHJleS5ncm9kem92c2t5QGFtZC5jb20+CgpSZXZpZXdlZC1ieTog Q2hyaXN0aWFuIEvDtm5pZyA8Y2hyaXN0aWFuLmtvZW5pZ0BhbWQuY29tPgoKPiAtLS0KPiAgIGRy aXZlcnMvZ3B1L2RybS9hbWQvYW1kZ3B1L2FtZGdwdV90dG0uYyB8IDIxICsrKysrKysrKysrKysr KystLS0tLQo+ICAgMSBmaWxlIGNoYW5nZWQsIDE2IGluc2VydGlvbnMoKyksIDUgZGVsZXRpb25z KC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2FtZC9hbWRncHUvYW1kZ3B1X3R0 bS5jIGIvZHJpdmVycy9ncHUvZHJtL2FtZC9hbWRncHUvYW1kZ3B1X3R0bS5jCj4gaW5kZXggYTc4 NWFjYzA5ZjIwLi45MzE2M2IyMjBlNDYgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2Ft ZC9hbWRncHUvYW1kZ3B1X3R0bS5jCj4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2FtZC9hbWRncHUv YW1kZ3B1X3R0bS5jCj4gQEAgLTQ5LDYgKzQ5LDcgQEAKPiAgIAo+ICAgI2luY2x1ZGUgPGRybS9k cm1fZGVidWdmcy5oPgo+ICAgI2luY2x1ZGUgPGRybS9hbWRncHVfZHJtLmg+Cj4gKyNpbmNsdWRl IDxkcm0vZHJtX2Rydi5oPgo+ICAgCj4gICAjaW5jbHVkZSAiYW1kZ3B1LmgiCj4gICAjaW5jbHVk ZSAiYW1kZ3B1X29iamVjdC5oIgo+IEBAIC0xOTgyLDE4ICsxOTgzLDI4IEBAIHZvaWQgYW1kZ3B1 X3R0bV9zZXRfYnVmZmVyX2Z1bmNzX3N0YXR1cyhzdHJ1Y3QgYW1kZ3B1X2RldmljZSAqYWRldiwg Ym9vbCBlbmFibGUpCj4gICBzdGF0aWMgdm1fZmF1bHRfdCBhbWRncHVfdHRtX2ZhdWx0KHN0cnVj dCB2bV9mYXVsdCAqdm1mKQo+ICAgewo+ICAgCXN0cnVjdCB0dG1fYnVmZmVyX29iamVjdCAqYm8g PSB2bWYtPnZtYS0+dm1fcHJpdmF0ZV9kYXRhOwo+ICsJc3RydWN0IGRybV9kZXZpY2UgKmRkZXYg PSBiby0+YmFzZS5kZXY7Cj4gICAJdm1fZmF1bHRfdCByZXQ7Cj4gKwlpbnQgaWR4Owo+ICAgCj4g ICAJcmV0ID0gdHRtX2JvX3ZtX3Jlc2VydmUoYm8sIHZtZik7Cj4gICAJaWYgKHJldCkKPiAgIAkJ cmV0dXJuIHJldDsKPiAgIAo+IC0JcmV0ID0gYW1kZ3B1X2JvX2ZhdWx0X3Jlc2VydmVfbm90aWZ5 KGJvKTsKPiAtCWlmIChyZXQpCj4gLQkJZ290byB1bmxvY2s7Cj4gKwlpZiAoZHJtX2Rldl9lbnRl cihkZGV2LCAmaWR4KSkgewo+ICsJCXJldCA9IGFtZGdwdV9ib19mYXVsdF9yZXNlcnZlX25vdGlm eShibyk7Cj4gKwkJaWYgKHJldCkgewo+ICsJCQlkcm1fZGV2X2V4aXQoaWR4KTsKPiArCQkJZ290 byB1bmxvY2s7Cj4gKwkJfQo+ICAgCj4gLQlyZXQgPSB0dG1fYm9fdm1fZmF1bHRfcmVzZXJ2ZWQo dm1mLCB2bWYtPnZtYS0+dm1fcGFnZV9wcm90LAo+IC0JCQkJICAgICAgIFRUTV9CT19WTV9OVU1f UFJFRkFVTFQsIDEpOwo+ICsJCSByZXQgPSB0dG1fYm9fdm1fZmF1bHRfcmVzZXJ2ZWQodm1mLCB2 bWYtPnZtYS0+dm1fcGFnZV9wcm90LAo+ICsJCQkJCQlUVE1fQk9fVk1fTlVNX1BSRUZBVUxULCAx KTsKPiArCj4gKwkJIGRybV9kZXZfZXhpdChpZHgpOwo+ICsJfSBlbHNlIHsKPiArCQlyZXQgPSB0 dG1fYm9fdm1fZHVtbXlfcGFnZSh2bWYsIHZtZi0+dm1hLT52bV9wYWdlX3Byb3QpOwo+ICsJfQo+ ICAgCWlmIChyZXQgPT0gVk1fRkFVTFRfUkVUUlkgJiYgISh2bWYtPmZsYWdzICYgRkFVTFRfRkxB R19SRVRSWV9OT1dBSVQpKQo+ICAgCQlyZXR1cm4gcmV0Owo+ICAgCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRy aS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5v cmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK