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Thu, 26 Jan 2023 06:07:46 -0800 (PST) Message-ID: <012e38c7-8cb9-a65c-a553-e8a2fafe6f3b@kernel.dk> Date: Thu, 26 Jan 2023 07:07:45 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Subject: Re: [PATCH] arm64: treat PF_IO_WORKER like PF_KTHREAD for mitigations Content-Language: en-US To: Will Deacon Cc: Catalin Marinas , linux-arm-kernel@lists.infradead.org References: <20230126140017.GD29148@willie-the-truck> From: Jens Axboe In-Reply-To: <20230126140017.GD29148@willie-the-truck> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230126_060759_420887_815D65AB X-CRM114-Status: GOOD ( 15.61 ) 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 T24gMS8yNi8yMyA3OjAw4oCvQU0sIFdpbGwgRGVhY29uIHdyb3RlOgo+IE9uIFdlZCwgSmFuIDI1 LCAyMDIzIGF0IDA5OjQzOjM0QU0gLTA3MDAsIEplbnMgQXhib2Ugd3JvdGU6Cj4+IExpa2UgUEZf S1RIUkVBRCwgUEZfSU9fV09SS0VSIG5ldmVyIGV4aXQgdG8gdXNlcnNwYWNlLiBUaGV5IGV4aXN0 Cj4+IGVudGlyZWx5IHdpdGhpbiB0aGUga2VybmVsLCBhbmQgaGVuY2UgZG9uJ3QgbmVlZCBhbnkg dGFzayBtaXRpZ2F0aW9ucwo+PiBhcHBsaWVkLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBKZW5zIEF4 Ym9lIDxheGJvZUBrZXJuZWwuZGs+Cj4+Cj4+IC0tLQo+Pgo+PiBkaWZmIC0tZ2l0IGEvYXJjaC9h cm02NC9rZXJuZWwvcHJvdG9uLXBhY2suYyBiL2FyY2gvYXJtNjQva2VybmVsL3Byb3Rvbi1wYWNr LmMKPj4gaW5kZXggZmNhOWNjNmY1NTgxLi4yNWEyMWMzZDQ0NmMgMTAwNjQ0Cj4+IC0tLSBhL2Fy Y2gvYXJtNjQva2VybmVsL3Byb3Rvbi1wYWNrLmMKPj4gKysrIGIvYXJjaC9hcm02NC9rZXJuZWwv cHJvdG9uLXBhY2suYwo+PiBAQCAtNjU0LDcgKzY1NCw3IEBAIHN0YXRpYyB2b2lkIF9fdXBkYXRl X3BzdGF0ZV9zc2JzKHN0cnVjdCBwdF9yZWdzICpyZWdzLCBib29sIHN0YXRlKQo+PiAgdm9pZCBz cGVjdHJlX3Y0X2VuYWJsZV90YXNrX21pdGlnYXRpb24oc3RydWN0IHRhc2tfc3RydWN0ICp0c2sp Cj4+ICB7Cj4+ICAJc3RydWN0IHB0X3JlZ3MgKnJlZ3MgPSB0YXNrX3B0X3JlZ3ModHNrKTsKPj4g LQlib29sIHNzYnMgPSBmYWxzZSwga3RocmVhZCA9IHRzay0+ZmxhZ3MgJiBQRl9LVEhSRUFEOwo+ PiArCWJvb2wgc3NicyA9IGZhbHNlLCBrdGhyZWFkID0gdHNrLT5mbGFncyAmIChQRl9LVEhSRUFE IHwgUEZfSU9fV09SS0VSKTsKPiAKPiBIbW0sIHRoZSBvdGhlciB0d28gdXNlcyBvZiBQRl9LVEhS RUFEIGluIGFyY2gvYXJtNjQgYWxzbyBsb29rIHByZXR0eQo+IHN1c3BlY3QgaW4gbGlnaHQgb2Yg dGhpcyBwcm9wb3NhbC4gU2hvdWxkIHdlIGFsc28gdXBkYXRlCj4gc3Nic190aHJlYWRfc3dpdGNo KCkgYW5kIGFjY2Vzc19vaygpPyBJZiBub3QsIHRoZW4gYSBjb21tZW50IHdvdWxkIGJlCj4gaGFu ZHkgdG8gc2F5IHdoeSBQRl9LVEhSRUFEIGlzIHN1ZmZpY2llbnQgdGhlcmUuCgpUaGUgdWFjY2Vz cyBvbmUgbG9va3MgbGlrZSwgUEZfSU9fV09SS0VSIHRocmVhZHMgYXJlIGp1c3Qgbm9ybWFsIHVz ZXJzcGFjZQp0aHJlYWRzLiBUaGUgb25seSBkaWZmZXJlbmNlIGlzIHRoYXQgdGhleSBuZXZlciBl eGl0IHRvIHVzZXJzcGFjZSwgdGhleQpyZW1haW4gaW4gdGhlIGtlcm5lbC4gQnV0IGV2ZXJ5dGhp bmcgZWxzZSBpcyBqdXN0IGxpa2UgYSB0aHJlYWQuCgpCdXQgeWVzLCB0aGUgc3Nic190aHJlYWRf c3dpdGNoKCkgc2hvdWxkIGhhdmUgdGhpcyBjaGVjayB0b28uIEknbGwgc2VuZApvdXQgYW4gdXBk YXRlZCBwYXRjaC4KCi0tIApKZW5zIEF4Ym9lCgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4 LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK