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 4F94CC35FF3 for ; Fri, 21 Mar 2025 08:09:32 +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:References:From:To:Cc: Subject:Message-Id:Date:Mime-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZREhJaNHRsg1HC3XA6zpgTC2QHpsi1Rj7wBiScyw3/w=; b=LRsLzHkCD7W4+7 TD5RIeQkpc/HKyAILw6T2ng2+RrwAX1RoYKkZg2uMgoPom2DBqUoEMXcB0icklTEb+7RwLJ4Xq8yt zwWVHgI41sfyMYbO45GZZponYDJyOrMNviNRwke+euvvv2fNP7I4vXZhRjXydJQAwpG//i9tqrELU vmlnHQikMCTQnBZK0SbeQDS+OYHL1x565IZ3zNABbFoPPDsMFfbUR2aTtGCkVZbcwoAPWScj1jZM7 FXboqdRbZj/0kDx10TkqglLt0ZDTSUs+qMAdKfYF0DS0YRehwhoo21TxYkTbs9t1GAdMS30Lw/IEc EkBPh/MhXiBM0pl40UIQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tvXRW-0000000ECk2-0uzQ; Fri, 21 Mar 2025 08:09:26 +0000 Received: from mail-wr1-x42c.google.com ([2a00:1450:4864:20::42c]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tvX9m-0000000EA0R-2zY4 for linux-riscv@lists.infradead.org; Fri, 21 Mar 2025 07:51:08 +0000 Received: by mail-wr1-x42c.google.com with SMTP id ffacd0b85a97d-3913290f754so216600f8f.1 for ; Fri, 21 Mar 2025 00:51:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1742543465; x=1743148265; darn=lists.infradead.org; h=in-reply-to:references:from:to:cc:subject:message-id:date :content-transfer-encoding:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=PhIkdGys04hj0FOCl78FUSdH2+gL7DQzkmTGKMi3P1w=; b=C2Ab77+BIkZ3P18aqtj9OmGb+92iGK7sX/uywkJ/hb+hTNbQM+BMnAqnPiqd0I3N11 A9DxipiDIomE9wJ3EE4Gn9i62Sk5ypsT0r1aNWSQqak+QmjMf2eoRTfcTe36xLyTPYGG fKqcMjvdsjESPafD6kI3gLYKgeHW5ijt6CElSnpsm5rcR1AO8bnbH0bxh+c+jENxQtMw 6mY8WqLKMLnlsjyop8yLvtWQfyE5Ae+QB4u2QQyBzV885kuG4jdWsjRdjF49JBerLYUY ivvMZZoHDr3JwxmEdNwLl9VUX1ngsvSGmabWO7oSGYvE0Xe9tc6EkTGoIkFc7NwMW69q RTtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742543465; x=1743148265; h=in-reply-to:references:from:to:cc:subject:message-id:date :content-transfer-encoding:mime-version:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=PhIkdGys04hj0FOCl78FUSdH2+gL7DQzkmTGKMi3P1w=; b=D5VYbsSVdwq5oEJM2/2zr5OfAhZc0mfS/ugqX+27IYtoVifoUx0A9sfOQGtCIAh6FY 9JdMJalu2YT1s3lc2CNnbjwXlJm4AuSJlFRxuOPeDVuiAJV+aqj/9sNshqrPmNAAlI6R gOL9ydU+XeRaUufPXLV7HhMEIf1nPnnopveB5PkyYkts+bUeK3pS2xj601R0DcKItz+/ ZZ7f+mcb2Y4Ga221Unh0ztmQ82b5GZwUANth2UbWf/LTplLfFpj9EZZ1hytpPdGKMuv7 5Ef7tYEfSMlKzZC7ZzPjDiPSRYKcs1HhNny1c+EES6YqQRT4oOR3eB8bh5H7HKovQm/g TMCg== X-Forwarded-Encrypted: i=1; AJvYcCU0rCsD7VFC+vi88KVLBBX81KOsCz7dXR0iHTvODYH7mBwn++K09QBVlRY6PNRJS+44Juk7+3/kjK3v1g==@lists.infradead.org X-Gm-Message-State: AOJu0Yzuls2lEc4TjRGIrMt+G6b0h4m7Fi+UjLChc8FjXghMz2upCE/F khrHXsn4kQf6F3KCMuDZPnqIxl55ryR2eHsqIFdP7TCpaK5kJA31PGP/2T3Lg6E= X-Gm-Gg: ASbGnctM32dm4lFZS7+LkIMb6s4rNod4p3X1khDKbYGeXvRHDupW/gOY9/UJFDxmD96 +TdaxaCXL7noUZDYzovIiap+o+a9h5ULThsNRJ3BjwdUuxnyEYMqvdZ6biV9+Vf1RaWAv490Fjz nbz0Gm931bWiVmjKwnMvFEDPzohGp7UrMIukGlJdH323NHyjGnnmjSUQrQk+uOnTTWMSi5+UBSy GsqzWNDT0ePA1bzXlxKz3ADn+k/y3BDAbiG3Tx6TfcHbFGbGxMPwAj0OGVm8FdJVX8DLGh+PEF5 9IBUynEHOjxK/GDZPnJyIrkrTxtJ9se1SOd4xOOddMGAY3LvcsJ4wqA8/J0oxT/tcGKq350Jqee eTkRZ X-Google-Smtp-Source: AGHT+IGwi45hePFM2TZdMOTyXUgfdngf4+B913tg/H8YfeoX7CrwBIY2Kj9KlDmHfMfV0eRC+zYKag== X-Received: by 2002:a5d:598b:0:b0:38d:d743:7d36 with SMTP id ffacd0b85a97d-3997f93046emr899094f8f.10.1742543464931; Fri, 21 Mar 2025 00:51:04 -0700 (PDT) Received: from localhost (ip-89-103-73-235.bb.vodafone.cz. [89.103.73.235]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d4fdb06b9sm18758395e9.36.2025.03.21.00.51.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Mar 2025 00:51:04 -0700 (PDT) Mime-Version: 1.0 Date: Fri, 21 Mar 2025 08:51:04 +0100 Message-Id: Subject: Re: [PATCH v12 25/28] riscv: create a config for shadow stack and landing pad instr support Cc: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Dave Hansen" , , "H. Peter Anvin" , "Andrew Morton" , "Liam R. Howlett" , "Vlastimil Babka" , "Lorenzo Stoakes" , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Conor Dooley" , "Rob Herring" , "Krzysztof Kozlowski" , "Arnd Bergmann" , "Christian Brauner" , "Peter Zijlstra" , "Oleg Nesterov" , "Eric Biederman" , "Kees Cook" , "Jonathan Corbet" , "Shuah Khan" , "Jann Horn" , "Conor Dooley" , , , , , , , , , , , , , , , , , , , , , , "Zong Li" , "linux-riscv" To: "Deepak Gupta" From: =?utf-8?q?Radim_Kr=C4=8Dm=C3=A1=C5=99?= References: <20250314-v5_user_cfi_series-v12-0-e51202b53138@rivosinc.com> <20250314-v5_user_cfi_series-v12-25-e51202b53138@rivosinc.com> In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250321_005106_749118_E3CBFC29 X-CRM114-Status: GOOD ( 27.38 ) 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 MjAyNS0wMy0yMFQxNToyOTo1NS0wNzowMCwgRGVlcGFrIEd1cHRhIDxkZWJ1Z0ByaXZvc2luYy5j b20+Ogo+IE9uIFRodSwgTWFyIDIwLCAyMDI1IGF0IDI6MjXigK9QTSBSYWRpbSBLcsSNbcOhxZkg PHJrcmNtYXJAdmVudGFuYW1pY3JvLmNvbT4gd3JvdGU6Cj4+Cj4+IDIwMjUtMDMtMTRUMTQ6Mzk6 NDQtMDc6MDAsIERlZXBhayBHdXB0YSA8ZGVidWdAcml2b3NpbmMuY29tPjoKPj4gPiBUaGlzIHBh dGNoIGNyZWF0ZXMgYSBjb25maWcgZm9yIHNoYWRvdyBzdGFjayBzdXBwb3J0IGFuZCBsYW5kaW5n IHBhZCBpbnN0cgo+PiA+IHN1cHBvcnQuIFNoYWRvdyBzdGFjayBzdXBwb3J0IGFuZCBsYW5kaW5n IGluc3RyIHN1cHBvcnQgY2FuIGJlIGVuYWJsZWQgYnkKPj4gPiBzZWxlY3RpbmcgYENPTkZJR19S SVNDVl9VU0VSX0NGSWAuIFNlbGVjdGluZyBgQ09ORklHX1JJU0NWX1VTRVJfQ0ZJYCB3aXJlcwo+ PiA+IHVwIHBhdGggdG8gZW51bWVyYXRlIENQVSBzdXBwb3J0IGFuZCBpZiBjcHUgc3VwcG9ydCBl eGlzdHMsIGtlcm5lbCB3aWxsCj4+ID4gc3VwcG9ydCBjcHUgYXNzaXN0ZWQgdXNlciBtb2RlIGNm aS4KPj4gPgo+PiA+IElmIENPTkZJR19SSVNDVl9VU0VSX0NGSSBpcyBzZWxlY3RlZCwgc2VsZWN0 IGBBUkNIX1VTRVNfSElHSF9WTUFfRkxBR1NgLAo+PiA+IGBBUkNIX0hBU19VU0VSX1NIQURPV19T VEFDS2AgYW5kIERZTkFNSUNfU0lHRlJBTUUgZm9yIHJpc2N2Lgo+PiA+Cj4+ID4gUmV2aWV3ZWQt Ynk6IFpvbmcgTGkgPHpvbmcubGlAc2lmaXZlLmNvbT4KPj4gPiBTaWduZWQtb2ZmLWJ5OiBEZWVw YWsgR3VwdGEgPGRlYnVnQHJpdm9zaW5jLmNvbT4KPj4gPiAtLS0KPj4gPiBkaWZmIC0tZ2l0IGEv YXJjaC9yaXNjdi9LY29uZmlnIGIvYXJjaC9yaXNjdi9LY29uZmlnCj4+ID4gQEAgLTI1MCw2ICsy NTAsMjYgQEAgY29uZmlnIEFSQ0hfSEFTX0JST0tFTl9EV0FSRjUKPj4gPiArY29uZmlnIFJJU0NW X1VTRVJfQ0ZJCj4+ID4gKyAgICAgZGVmX2Jvb2wgeQo+PiA+ICsgICAgIGJvb2wgInJpc2N2IHVz ZXJzcGFjZSBjb250cm9sIGZsb3cgaW50ZWdyaXR5Igo+PiA+ICsgICAgIGRlcGVuZHMgb24gNjRC SVQgJiYgJChjYy1vcHRpb24sLW1hYmk9bHA2NCAtbWFyY2g9cnY2NGltYV96aWNmaXNzKQo+PiA+ ICsgICAgIGRlcGVuZHMgb24gUklTQ1ZfQUxURVJOQVRJVkUKPj4gPiArICAgICBzZWxlY3QgQVJD SF9IQVNfVVNFUl9TSEFET1dfU1RBQ0sKPj4gPiArICAgICBzZWxlY3QgQVJDSF9VU0VTX0hJR0hf Vk1BX0ZMQUdTCj4+ID4gKyAgICAgc2VsZWN0IERZTkFNSUNfU0lHRlJBTUUKPj4gPiArICAgICBo ZWxwCj4+ID4gKyAgICAgICBQcm92aWRlcyBDUFUgYXNzaXN0ZWQgY29udHJvbCBmbG93IGludGVn cml0eSB0byB1c2Vyc3BhY2UgdGFza3MuCj4+ID4gKyAgICAgICBDb250cm9sIGZsb3cgaW50ZWdy aXR5IGlzIHByb3ZpZGVkIGJ5IGltcGxlbWVudGluZyBzaGFkb3cgc3RhY2sgZm9yCj4+ID4gKyAg ICAgICBiYWNrd2FyZCBlZGdlIGFuZCBpbmRpcmVjdCBicmFuY2ggdHJhY2tpbmcgZm9yIGZvcndh cmQgZWRnZSBpbiBwcm9ncmFtLgo+PiA+ICsgICAgICAgU2hhZG93IHN0YWNrIHByb3RlY3Rpb24g aXMgYSBoYXJkd2FyZSBmZWF0dXJlIHRoYXQgZGV0ZWN0cyBmdW5jdGlvbgo+PiA+ICsgICAgICAg cmV0dXJuIGFkZHJlc3MgY29ycnVwdGlvbi4gVGhpcyBoZWxwcyBtaXRpZ2F0ZSBST1AgYXR0YWNr cy4KPj4gPiArICAgICAgIEluZGlyZWN0IGJyYW5jaCB0cmFja2luZyBlbmZvcmNlcyB0aGF0IGFs bCBpbmRpcmVjdCBicmFuY2hlcyBtdXN0IGxhbmQKPj4gPiArICAgICAgIG9uIGEgbGFuZGluZyBw YWQgaW5zdHJ1Y3Rpb24gZWxzZSBDUFUgd2lsbCBmYXVsdC4gVGhpcyBtaXRpZ2F0ZXMgYWdhaW5z dAo+PiA+ICsgICAgICAgSk9QIC8gQ09QIGF0dGFja3MuIEFwcGxpY2F0aW9ucyBtdXN0IGJlIGVu YWJsZWQgdG8gdXNlIGl0LCBhbmQgb2xkIHVzZXItCj4+ID4gKyAgICAgICBzcGFjZSBkb2VzIG5v dCBnZXQgcHJvdGVjdGlvbiAiZm9yIGZyZWUiLgo+PiA+ICsgICAgICAgZGVmYXVsdCB5Cj4+Cj4+ IEEgaGlnaCBsZXZlbCBxdWVzdGlvbiB0byBraWNrIG9mZiBteSByZXZpZXc6Cj4+Cj4+IFdoeSBh cmUgbGFuZGluZyBwYWRzIGFuZCBzaGFkb3cgc3RhY2tzIG1lcmdlZCB0b2dldGhlcj8KPj4KPj4g QXBhcnQgZnJvbSBhZGRpbmcgYnVpbGQgZmxleGliaWxpdHksIHdlIGNvdWxkIGFsc28gc3BsaXQg dGhlIHBhdGNoZXMKPj4gaW50byB0d28gaXNvbGF0ZWQgc2VyaWVzLCBiZWNhdXNlIHRoZSBmZWF0 dXJlcyBhcmUgaW5kZXBlbmRlbnQuCj4KPiBTdHJpY3RseSBmcm9tIENQVSBleHRlbnNpb25zIHBv aW50IG9mIHZpZXcgdGhleSBhcmUgaW5kZXBlbmRlbnQgZmVhdHVyZXMuCj4gQWx0aG91Z2ggZnJv bSBhIHVzYWJpbGl0eSBwb2ludCBvZiB2aWV3IHRoZXkgY29tcGxlbWVudCBlYWNoIG90aGVyLiBB IHVzZXIKPiB3YW50aW5nIHRvIGVuYWJsZSBzdXBwb3J0IGZvciBjb250cm9sIGZsb3cgaW50ZWdy aXR5IHdvdWxkbid0IGJlIGVuYWJsaW5nCj4gb25seSBsYW5kaW5nIHBhZCBhbmQgbGVhdmluZyBy ZXR1cm4gZmxvdyBvcGVuIGZvciBhbiBhdHRhY2tlciBhbmQgdmljZS12ZXJzYS4KPiBUaGF0J3Mg d2h5IEkgZGVmaW5lZCBhIHNpbmdsZSBDT05GSUcgZm9yIENGSS4KPgo+IEZyb20gb3JnYW5pemlu ZyBwYXRjaGVzIGluIHRoZSBwYXRjaCBzZXJpZXMsIHNoYWRvdyBzdGFjayBhbmQgbGFuZGluZwo+ IHBhZCBwYXRjaGVzIGRvIG5vdCBjcm9zcyBpbnRvIGVhY2ggb3RoZXIgYW5kIGFyZSBkaWZmZXJl bnQgZnJvbSBlYWNoCj4gb3RoZXIgZXhjZXB0IGR0LWJpbmRpbmdzLCBod3Byb2JlLCBjc3IgZGVm aW5pdGlvbnMuIEkgY2FuIHNlcGFyYXRlIHRoZW0KPiBvdXQgYXMgd2VsbCBpZiB0aGF0J3MgZGVz aXJlZC4KCkl0IHdvdWxkIGJlIG15IHByZWZlcmVuY2UsIGJ1dCBpdCdzIHRoZSBtYWludGFpbmVy J3MgY2FsbC4KCkkgdGhpbmsgdGhhdCBsYW5kaW5nIHBhZHMgY291bGQgYmUgbWVyZ2VkIGVhcmxp ZXIgaWYgdGhleSB3ZXJlIHBvc3RlZApzZXBhcmF0ZWx5LCBidXQgdGhpcyBzZXJpZXMgaXMgYWxy ZWFkeSBvbiB2MTIsIHNvIEkgZG9uJ3Qgd2FudCB0byBmb3JjZQphbnl0aGluZy4KCj4gRnVydGhl cm1vcmUsIEkgZG8gbm90IHNlZSBhbiBpbXBsZW1lbnRhdGlvbiBvbmx5IGltcGxlbWVudGluZyB6 aWNmaWxwCj4gd2hpbGUgbm90IGltcGxlbWVudGluZyB6aWNmaXNzLiBUaGVyZSBpcyBhIGNhc2Ug b2YgYSBub21tdSBjYXNlIHdoZXJlCj4gb25seSB6aWNmaWxwIG1pZ2h0IGJlIGltcGxlbWVudGVk IGFuZCBubyB6aWNmaXNzLiBIb3dldmVyIHRoYXQncyB0aGUgY2FzZQo+IHdoaWNoIGlzIGFueXdh eXMgcmlzY3YgbGludXgga2VybmVsIGlzIG5vdCBhY3RpdmVseSBiZWluZyB0ZXN0ZWQuIElJUkMs Cj4gaXQgd2FzIChub21tdSBsaW51eCkgY29uc2lkZXJlZCB0byBiZSBwaGFzZWQgb3V0L25vdCBz dXBwb3J0ZWQgYXMgd2VsbC4KPgo+IFdlIGNvdWxkIGhhdmUgdHdvIGRpZmZlcmVudCBjb25maWdz IGJ1dCBJIGRvbid0IHNlZSB3aGF0IHdvdWxkIHNlcnZlCj4gYXBhcnQgZnJvbSB0aGUgYWJpbGl0 eSB0byBidWlsZCBzdXBwb3J0IGZvciBsYW5kaW5nIHBhZCBhbmQgc2hhZG93IHN0YWNrCj4gZGlm ZmVyZW50bHkuIEFzIEkgc2FpZCBmcm9tIGEgdXNhYmlsaXR5IHBvaW50IG9mIHZpZXcgYm90aCBm ZWF0dXJlcwo+IGFyZSBjb21wbGltZW50aW5nCj4gdG8gZWFjaCBvdGhlciByYXRoZXIgdGhhbiBz dGFuZGluZyBvdXQgYWxvbmUgYW5kIHByb3ZpZGluZyBmdWxsIHByb3RlY3Rpb24uCj4KPiBBIGtl cm5lbCBpcyBidWlsdCB3aXRoIHN1cHBvcnQgZm9yIGVuYWJsaW5nIGJvdGggZmVhdHVyZXMgb3Ig bm9uZS4gU3VyZSB1c2VyCj4gY2FuIHVzZSBlaXRoZXIgb2YgdGhlIHByY3RsIHRvIGVuYWJsZSBl aXRoZXIgb2YgdGhlIGZlYXR1cmVzIGluIHdoYXRldmVyCj4gY29tYmluYXRpb24gdGhleSBzZWUg Zml0LgoKWWVhaCwgaXQgd2lsbCBiZSByYXJlLCBidXQgaWYgZm9yIHNvbWUgcmVhc29uIG9uZSBm ZWF0dXJlIGNhbm5vdCBiZQp1c2VkLCB0aGVuIGhhdmluZyBqdXN0IG9uZSBpcyBiZXR0ZXIgdGhh biBub25lLgpXZSBjYW4gZWFzaWx5IGFkZCBjb21waWxlIG9wdGlvbnMgbGF0ZXIgYW5kIGlmIHdl IHN0YXJ0IHdpdGggc2VwYXJhdGUKa2VybmVsIHBhcmFtZXRlcnMsIHRoZW4gdGhlIHVzZXJzIHdv bid0IGV2ZW4gbm90aWNlIGEgZGlmZmVyZW5jZS4KCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNj dkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4v bGlzdGluZm8vbGludXgtcmlzY3YK