From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 32A76C83F17 for ; Sat, 26 Jul 2025 18:37:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ATHIDZkehsZPt21uHlhUTKSJSfiktXC6BWKYKvxIcxo=; b=B+Fy/BMfti01/v eta5W+QL2QqMw2a0M21ISAe7veUBpYnogHP5met9qyUrRr9B4BHGAFLQQjF0VFY0Rm8hKgz9GOntn GTADI2ft/t2EqPG4Qj6qRyLrS0MGRvH7CT9j6et6KafR3B56C9P4E3Vvk67trSjhIurOL6bFiZqhV 0BcD98YQkkyqIJytrKb4QoLIbHfT0DRYG/cGVHvlILtM/GjAQkiM9dZr9mGaHzBW2zt17WZx1tfqw 2RK477jQh0JXD5OqkDObtnSXA15vZhQwEwgEVVu9JPDtQLPEA21o1piB2Bmh7Bq8anMezgVuwFK8Z 4CAnaWVMzfkr4h9d3MMw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ufjlb-0000000Bjs5-1Pmj; Sat, 26 Jul 2025 18:37:07 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ufjlY-0000000Bjre-0vcM; Sat, 26 Jul 2025 18:37:05 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 91AA2444F8; Sat, 26 Jul 2025 18:37:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C9FAC4CEED; Sat, 26 Jul 2025 18:37:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753555023; bh=wJaOsXIJfuq0ic1DGjE1tBK2mIUUuFDFBblMg6pSJPM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=B0gnxEDjlA/8MHvDPk4VLhu2+Ol9SzXH/UxlomcH7yoN9bI0tna6Wm9JxSwiwiDF8 Ssi19+Z+ANff19qOwCrrY+Zv/aiuI1kLASexs+XI3mjFBVPvmXYpDz0ZKtp2qfTD/5 4YSYIQujXv3aJvISuKe8LxNR+TF1JUMxqNRjy/nXlbhropw188cFGEjpn/vHx92NSQ Is0WMdsWMF9hwmsH2BjA78MDj6ri60En9eywgjZaKohuzXuLhEyYQ4tbK6QZL+mUur z0CEBgPf7zjlWtmQl86EvSSsopRu63VjpI/hHuXeTjni22P45/8vl0jJZffLkKP4n0 +Em7ZhTs4SrFw== Date: Sat, 26 Jul 2025 11:37:01 -0700 From: Drew Fustini To: Radim =?utf-8?B?S3LEjW3DocWZ?= Cc: Vivian Wang , Palmer Dabbelt , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , Alexandre Ghiti , Paul Walmsley , Samuel Holland , Drew Fustini , Andy Chiu , Conor Dooley , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv Subject: Re: [PATCH] riscv: Add sysctl to control discard of vstate during syscall Message-ID: References: <20250719033912.1313955-1-fustini@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250726_113704_301397_51DA9128 X-CRM114-Status: GOOD ( 30.45 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gRnJpLCBKdWwgMjUsIDIwMjUgYXQgMDg6NDc6MDRQTSArMDIwMCwgUmFkaW0gS3LEjW3DocWZ IHdyb3RlOgo+IDIwMjUtMDctMjVUMjM6MDE6MDMrMDg6MDAsIFZpdmlhbiBXYW5nIDx3YW5ncnVp a2FuZ0Bpc2Nhcy5hYy5jbj46Cj4gPiBPbiA3LzI1LzI1IDE4OjE4LCBSYWRpbSBLcsSNbcOhxZkg d3JvdGU6Cj4gPj4gMjAyNS0wNy0yNFQwNTo1NTo1NCswODowMCwgVml2aWFuIFdhbmcgPHdhbmdy dWlrYW5nQGlzY2FzLmFjLmNuPjoKPiA+Pj4gT24gNy8xOS8yNSAxMTozOSwgRHJldyBGdXN0aW5p IHdyb3RlOgo+ID4+Pj4gRnJvbTogRHJldyBGdXN0aW5pIDxkZnVzdGluaUB0ZW5zdG9ycmVudC5j b20+Cj4gPj4+PiBDbG9iYmVyaW5nIHRoZSB2ZWN0b3IgcmVnaXN0ZXJzIGNhbiBzaWduaWZpY2Fu dGx5IGluY3JlYXNlIHN5c3RlbSBjYWxsCj4gPj4+PiBsYXRlbmN5IGZvciBzb21lIGltcGxlbWVu dGF0aW9ucy4gVG8gbWl0aWdhdGUgdGhpcyBwZXJmb3JtYW5jZSBpbXBhY3QsIGEKPiA+Pj4+IHBv bGljeSBtZWNoYW5pc20gaXMgcHJvdmlkZWQgdG8gYWRtaW5pc3RyYXRvcnMsIGRpc3RybyBtYWlu dGFpbmVycywgYW5kCj4gPj4+PiBkZXZlbG9wZXJzIHRvIGNvbnRyb2wgdmVjdG9yIHN0YXRlIGRp c2NhcmQgaW4gdGhlIGZvcm0gb2YgYSBzeXNjdGwga25vYjoKPiA+Pj4gU28gSSBoYWQgYW4gaWRl YTogSXMgaXQgcG9zc2libGUgdG8gYXZvaWQgcmVwZWF0ZWRseSBkaXNjYXJkaW5nIHRoZQo+ID4+ PiBzdGF0ZSBvbiBldmVyeSBzeXNjYWxsIGJ5IHNldHRpbmcgVlMgdG8gSW5pdGlhbCBhZnRlciBk aXNjYXJkaW5nLCBhbmQKPiA+Pj4gYXZvaWRpbmcgZGlzY2FyZGluZyB3aGVuIFZTIGlzIEluaXRp YWw/IFNvOgo+ID4+Pgo+ID4+PiBpZiAoVlMgPT0gQ2xlYW4gfHwgVlMgPT0gRGlydHkpIHsKPiA+ Pj4gwqAgwqAgY2xvYmJlcjsKPiA+Pj4gwqAgwqAgVlMgPSBJbml0aWFsOwo+ID4+PiB9Cj4gPj4+ Cj4gPj4+IFRoaXMgd291bGQgYXZvaWQgdGhpcyBwcm9ibGVtIHdpdGggc3lzY2FsbC1oZWF2eSB1 c2VyIHByb2dyYW1zIHdoaWxlCj4gPj4+IGFkZGluZyBtaW5pbXVtIG92ZXJoZWFkIGZvciBldmVy eXRoaW5nIGVsc2UuCj4gPj4gSSB0aGluayB5b3VyIHByb3Bvc2FsIGltcHJvdmVzIHRoZSBleGlz dGluZyBjb2RlLCBidXQgaWYgYSB1c2Vyc3BhY2UgaXMKPiA+PiB1c2luZyB2ZWN0b3JzLCBpdCdz IGxpa2VseSBhbHNvIHJlc3RvcmluZyB0aGVtIGFmdGVyIGEgc3lzY2FsbCwgc28gdGhlCj4gPj4g c3RhdGUgd291bGQgaW1tZWRpYXRlbHkgZ2V0IGRpcnR5LCBhbmQgdGhlIG5leHQgc3lzY2FsbCB3 b3VsZCBhZ2Fpbgo+ID4+IG5lZWRsZXNzbHkgY2xvYmJlciB2ZWN0b3IgcmVnaXN0ZXJzLgo+ID4K PiA+IFdpdGhvdXQgYW55IGRhdGEgdG8gYmFjayBpdCB1cCwgSSB3b3VsZCBzYXkgdGhhdCBteSB1 bmRlcnN0YW5kaW5nIGlzCj4gPiB0aGF0IHRoaXMgc2hvdWxkIGJlIGEgcmFyZSBjYXNlLCBvbmx5 IGhhcHBlbmluZyBpZiBlLmcuIHNvbWVvbmUgaXMKPiA+IGFkZGluZyBwcmludGYgZGVidWdnaW5n IHRvIHRoZWlyIHZlY3RvciBjb2RlLiBPdGhlcndpc2UsIHZlY3RvciBsb29wcwo+ID4gc2hvdWxk IG5vdCBoYXZlIHN5c2NhbGxzIGluIHRoZW0uCj4gPgo+ID4gQSBtb3JlIHJlYXNvbmFibGUgd29y cnkgd291bGQgYmUgcHJvZ3JhbXMgdXNpbmcgUlZWIGV2ZXJ5d2hlcmUgaW4gYWxsCj4gPiBzb3J0 cyBvZiBjb21tb24gb3BlcmF0aW9ucy4gSW4gdGhhdCBjYXNlLCBhbHRlcm5hdGluZyBzeXNjYWxs cyBhbmQKPiA+IHZlY3RvcnMgd291bGQgbWFrZSB0aGUgZGlzY2FyZGluZyB3YXN0ZWZ1bC4KPiAK PiBHb29kIHBvaW50LiAgWWVhaCwgYXV0by12ZWN0b3JpemF0aW9uIG1pZ2h0IGJlIGhpbmRlcmVk LgoKWWVzLCBJIHRoaW5rIHRoYXQgdXNlcnNwYWNlIHZlY3RvciB1c2FnZSB3aWxsIGJlY29tZSBt b3JlIGNvbW1vbiBvdmVyCnRpbWUgZXZlbiBmb3IgIm9yZGluYXJ5IiBwcm9ncmFtcyBhcyBjb21w aWxlcnMgYW5kIGxpYnJhcmllcyBpbXByb3ZlLgpGb3IgZXhhbXBsZSwgaXQgbWF5IGJlIHRoZSBj YXNlIHRoYXQgdGhlIG1ham9yaXR5IG9mIHVzZXJzcGFjZSBiaW5hcmllcwp3aWxsIHVzZSB2ZWN0 b3Igb25jZSB0aGUgaWZ1bmMgbWVtY3B5IHBhdGNoZXMgZ28gaW4uCgo+IEluIHRoZSB3b3JzdCBj YXNlLCB1c2VycyBjb3VsZCBqdXN0IG5vdGljZSB0aGF0IGl0J3Mgc2xvd2luZyBwcm9ncmFtcwo+ IGRvd24sIGFuZCBkaXNhYmxlIGl0IHdpdGhvdXQgbG9va2luZyBmb3IgdGhlIGNhdXNlLgoKSSB0 aGluayB0aGF0IGEgZGVmYXVsdCBwb2xpY3kgb2Ygbm90IGNsb2JiZXJpbmcgaW4gc3lzY2FsbHMg d291bGQgYmUgdGhlCmJlc3QgdHJhZGUgb2ZmLiBJIGdhdmUgQ09ORklHX1JJU0NWX0lTQV9WX1ZT VEFURV9ESVNDQVJEIGEgZGVmYXVsdCBvZiBuCmluIHRoaXMgcGF0Y2gsIGFuZCBJIGltYWdpbmVk IHRoYXQgcGVvcGxlIGxpa2UgUGFsbWVyLCB3aG8gd2FudGVkIGl0IGZvcgp0ZXN0IHN1aXRlcywg Y291bGQgY2hhbmdlIHRoZSBkZWZhdWx0IG9yIHVzZSB0aGUgc3lzY3RsLgoKPiAKPiA+PiBQcmVz ZXJ2aW5nIHRoZSB2ZWN0b3Igc3RhdGUgc3RpbGwgc2VlbXMgYmV0dGVyIGZvciB1c2Vyc3BhY2Vz IHRoYXQgdXNlCj4gPj4gYm90aCB2ZWN0b3JzIGFuZCBzeXNjYWxscy4KPiA+Cj4gPiBJZiB3ZSBj YW4gZXhwZWN0IGUuZy4gdXNlcnNwYWNlIHByb2dyYW1zIHRvIHByaW1hcmlseSByZXBlYXRlZGx5 IHVzZSBSVlYKPiA+IHdpdGggbm8gc3lzY2FsbHMgYmV0d2VlbiBsb29wcywgKm9yKiBwcmltYXJp bHkgcmVwZWF0ZWRseSB1c2Ugc3lzY2FsbHMKPiA+IHdpdGggcmFyZSBvY2N1cnJlbmNlcyBvZiBS VlYgYmV0d2VlbiBzeXNjYWxscy4gVGhpcyB3YXksIHRoZSBwcmltYXJpbHkKPiA+IHN5c2NhbGwg cHJvZ3JhbXMgY2FuIGJlbmVmaXQgZnJvbSBzbGlnaHRseSBzd2l0Y2hpbmcsIHNpbmNlIHRoZXJl J3Mgbm8KPiA+IG5lZWQgdG8gc2F2ZSBhbmQgcmVzdG9yZSBzdGF0ZSBmb3IgdGhvc2UgbW9zdCBv ZiB0aGUgdGltZS4gSW4gZWZmZWN0LAo+ID4gc3lzY2FsbHMgc2VydmVzIGFzIGEgaGludCB0aGF0 IFJWViBpcyBvdmVyLgo+IAo+IFRoaXMgd291bGQgbmVlZCBkZWVwZXIgYW5hbHlzaXMsIGFuZCB3 ZSB3aWxsIHByb2JhYmx5IG5ldmVyIGJlIGNvcnJlY3QKPiB3aXRoIGEgc3lzdGVtLXdpZGUgcG9s aWN5IHJlZ2FyZGxlc3MgLS0gYSByb29tIGZvciBwcmN0bD8KPiAKPiBJIHRoaW5rIHRoZXJlIG1p Z2h0IGJlIGEgbG90IG9mIHByb2dyYW1zIHRoYXQgaGF2ZSBhIHJlcGVhdGluZyBwYXR0ZXJuCj4g b2YgY29tcHV0ZSAtPiBzeXNjYWxsIChlLmcuIHRvIHdyaXRlIHJlc3VsdHMpLCBhbmQgY2xvYmJl cmluZyBpcyBsb3NpbmcKPiBwZXJmb3JtYW5jZSBpZiBhIHByb2dyYW0gZG9lcyBtb3JlIHRoYW4g YSBzaW5nbGUgbG9vcCBwZXIgc3dpdGNoLgoKSXQncyBpbnRlcmVzdGluZyB0aGF0IHlvdSBtZW50 aW9uIHByY3RsIGFzIGl0IGRvZXMgc2VlbSBsaWtlIHRoYXQgY291bGQKcGxheSBhIHJvbGUgaGVy ZS4gSWYgcGVvcGxlIHRoaW5rIHRoYXQgb25lIHN5c2NhbGwgY2xvYmJlcmluZyBiZWhhdmlvcgpm b3IgdGhlIHdob2xlIHN5c3RlbSBpcyB0b28gbGltaXRlZCwgdGhlbiBtYXliZSBwcmN0bCBjb3Vs ZCBiZSBhIGJldHRlcgpzb2x1dGlvbi4gSSBiZWxpZXZlIGl0IHNob3VsZCBkZWZhdWx0IHRvIG5v dCBjbG9iYmVyaW5nLiBJdCBjb3VsZCBiZQplbmFibGVkIGZvciB0ZXN0IHN1aXRlcyBpbiBDSSB0 aGF0IHdhbnQgdGhlIHN0cmljdCBjbG9iYmVyaW5nLCBvciBmb3IKcHJvZ3JhbXMgdGhhdCBhcmUg a25vd24gdG8gd29yayBiZXR0ZXIgd2l0aCBjbG9iYmVyaW5nIGVuYWJsZWQuCgpUaGFua3MsCkRy ZXcKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4 LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK