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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211d0f474fcsm92502505ad.213.2024.11.20.06.09.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Nov 2024 06:09:46 -0800 (PST) From: Max Hsu Date: Wed, 20 Nov 2024 22:09:32 +0800 Subject: [PATCH RFC v3 1/3] dt-bindings: riscv: Add Svukte entry Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241120-dev-maxh-svukte-v3-v3-1-1e533d41ae15@sifive.com> References: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> In-Reply-To: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Atish Patra Cc: Palmer Dabbelt , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Max Hsu , Samuel Holland , Deepak Gupta , Alexandre Ghiti X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1502; i=max.hsu@sifive.com; h=from:subject:message-id; bh=G4f8dg0A+liIdlqDQ5PGVlbXce8P3mr8X0xg0tMM1ms=; b=owEB7QES/pANAwAKAdID/Z0HeUC9AcsmYgBnPe2k4LuiDqPUonIF/e/ODWE2vS7bEQWO/KzSL gPzEPspzxiJAbMEAAEKAB0WIQTqXmcbOhS2KZE9X2jSA/2dB3lAvQUCZz3tpAAKCRDSA/2dB3lA vQbzC/9AwP3Nmt74myupKpFJKZXM2QnkuxXGfXcitojEe/gMao05/SkOAHIsf3yJj3RhoV0WzvR FiV5XbmZ+jumctRNOxQGgnrBoQV8SpcEOjGN/XKYE1k4eP6d1jtU4WOskADAWK5VSeqDLp+VYYI YrcM7vbZ2iimjRdPfPsoasi4+OaiXAaz0eIaM3CHawJR4neDhyVpOzZwBD7IETt90VeEkzrVP4K 3ltoTNi7EZ+udq7q7ndYCxi/MXYKCvimTV3M39pHneUSPY2cyxtlJu+n9EWZJYL84J9yZtGPlYG m2tZd0oX6xwiv1Uh5Z9tqs4UWN35Y8LutJjkKG7vm1Bg9H967btc6VGXZUki6zBLKR5bW16GxZo ktGe6dTU9hn2GEOtZjuRD8CmLsTFWW2tMjULAX4WL6++j6B2UgjhxMQ2/2Tjbstu89shjOa0XVf b5G5ilXCiSxfoO+EIIhInJ34nsUQzIaicdyBt0mzyfUlH1UiV+E2MVjn0TY15eiqGYZCI= X-Developer-Key: i=max.hsu@sifive.com; a=openpgp; fpr=EA5E671B3A14B629913D5F68D203FD9D077940BD Add an entry for the Svukte extension to the riscv,isa-extensions property. Reviewed-by: Samuel Holland Reviewed-by: Deepak Gupta Reviewed-by: Alexandre Ghiti Signed-off-by: Max Hsu --- Documentation/devicetree/bindings/riscv/extensions.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Docu= mentation/devicetree/bindings/riscv/extensions.yaml index af7e5237b2c03085611daad9e1e39aa93cc8ae95..bf177274b5c6f4cd1c842b4221c= a5bbfc2960a0a 100644 --- a/Documentation/devicetree/bindings/riscv/extensions.yaml +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml @@ -189,6 +189,15 @@ properties: memory types as ratified in the 20191213 version of the privil= eged ISA specification. =20 + - const: svukte + description: + The standard Svukte supervisor-level extension for making user= -mode + accesses to supervisor memory raise page faults in constant ti= me, + mitigating attacks that attempt to discover the supervisor + software's address-space layout. Currently under review as Pull + Request number 1564 at commit 81dc9277 ("Svukte v0.3") of + riscv-isa-manual. + - const: svvptc description: The standard Svvptc supervisor-level extension for --=20 2.43.2 From nobody Thu Nov 28 20:37:07 2024 Received: from mail-pf1-f193.google.com (mail-pf1-f193.google.com [209.85.210.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C8841D63DC for ; Wed, 20 Nov 2024 14:09:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.193 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732111792; cv=none; b=tAXeguqd0wGXNZcioau8jTiR81qmiBuCRFyPwYXkCvsOwnSN6wjz4EyXY+NY4NY+6pBTl8yU92Df3TA+yEzBKp+GIBoLNNyXP3LF87Icb04x9pMnvl56XjACTPlB2mzFxN4cqF85yztgBBlVZiOE4/q4NzbEcuUSD71ZU11xLwU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732111792; c=relaxed/simple; bh=kquTSCG6ldl8Jsr1Yyg5zz3XR4Ry7zAqV4fXZmtCDZs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UOLxeqsxCQSgpBNd9eveBlkH8l0gruJ8dDfLaoR4GpA5NzK8IfbCjr6zO8D8gYJoHlNfX61gQbCbzeboXQvB+Ut1m4g88r7Vd9pNtmr95aWxLlJL7ViFOOsSZHljYP7Xlrfk7440EaKxK3GAmi8VaAhluYmSNsSk+JkgaGHs0rw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=sifive.com; spf=pass smtp.mailfrom=sifive.com; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b=KGrIHSs1; arc=none smtp.client-ip=209.85.210.193 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=sifive.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sifive.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="KGrIHSs1" Received: by mail-pf1-f193.google.com with SMTP id d2e1a72fcca58-71e467c3996so1707740b3a.2 for ; Wed, 20 Nov 2024 06:09:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1732111791; x=1732716591; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=3HiZ5B1+Hi9dts06uRmUFzh40lIglAJLzfcQl+niZxQ=; b=KGrIHSs10UWEJLj+4M947ZtToYfZ2mNyNVnVrbpguN35/vbFXGsimmaksaPT14Akh+ qBiVn08cW+KglO8QbNWePjteMC1RQK4NtDLi2fsPuw/DACM+6H4JelpU51pzHKTxKffU gohT0xzD6iDb0YHJN0JH9XV2ARGwpRnkCQDrrqikspsXStt9EJVJ0KsG7S9isJUsO0Wu TQTST8GeOhLjrNM+VBJrMXNVlirptOWydm/8fge5jTyeZz4MXsGj9yHbfrsdslSE2u7g YmljSwO8fSRcpB+IIGjxv/+RcWKNFFXMKMcUF32071elCTywNXUeVczi/k3FvQmfzDYX 8jaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732111791; x=1732716591; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=3HiZ5B1+Hi9dts06uRmUFzh40lIglAJLzfcQl+niZxQ=; b=Y9pe73WKVg2tZ6Q926upyBUS/zoR+MQe+/S3ZwAqZao1VA2/a6MitdtkZ8uhp3WvFf Q1TEJj+eidoyUfl2hU7p8kRvbvOp1Q1sLvR2J346dhNRZkiQk6HpVb7Saf9jiiUF5vuO d5QjYJ8txPLGEAKYMvO/gpdmy6RYBqodrfeDkInkEVnwEAJkQutaXyctPFZ9lS8+H9ka 4WZ3jMG0YtsWll2dqJED1f0GQk01QzFwrgrX8ENVyZdPcxTWaSD6xwfFx4HdGSomuCn3 utts0rVbBGOypjI8rJ/lHRmLfrIy4Y95xOjRNJogOz3OfMTjqZ42NChO9dINbowbLkt+ hhVQ== X-Forwarded-Encrypted: i=1; AJvYcCUpkuuEhYUQGOeSpqfsCKWN5rqFdCu6mGsm9f8fMbziEiXnGsK/W2r+sjSg2JRP6qT4oyHxA6p/y88PGeQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzNdxEmuZBX3cDEjGH6V75vq/XJbLYtYsasTwBLfcmET9Ai2f0M bsDhKSgFMkpDFnEJjbN+P8hy2NmoEjL/C1ZHL0uUoXGvh4qW4+ykQNhjla/iSvg= X-Google-Smtp-Source: AGHT+IENrSz65ancGchI+RHAOkUIUZtI0x71mxt8UzBTQ5e4W/m5EYNF2C+k64+tvhVagvHee3ibxg== X-Received: by 2002:a17:902:ccc6:b0:212:51ba:cbd3 with SMTP id d9443c01a7336-2126a3bc80bmr34655035ad.30.1732111790594; Wed, 20 Nov 2024 06:09:50 -0800 (PST) Received: from [127.0.1.1] (59-124-168-89.hinet-ip.hinet.net. [59.124.168.89]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211d0f474fcsm92502505ad.213.2024.11.20.06.09.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Nov 2024 06:09:50 -0800 (PST) From: Max Hsu Date: Wed, 20 Nov 2024 22:09:33 +0800 Subject: [PATCH RFC v3 2/3] riscv: Add Svukte extension support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241120-dev-maxh-svukte-v3-v3-2-1e533d41ae15@sifive.com> References: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> In-Reply-To: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Atish Patra Cc: Palmer Dabbelt , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Max Hsu , Samuel Holland , Deepak Gupta X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3055; i=max.hsu@sifive.com; h=from:subject:message-id; bh=kquTSCG6ldl8Jsr1Yyg5zz3XR4Ry7zAqV4fXZmtCDZs=; b=owEB7QES/pANAwAKAdID/Z0HeUC9AcsmYgBnPe2kCySnhiICdX2FOUve6ohMWBNinXyZuOSER TmwTRZU4NeJAbMEAAEKAB0WIQTqXmcbOhS2KZE9X2jSA/2dB3lAvQUCZz3tpAAKCRDSA/2dB3lA vQmxDACFDP3s/vWUFpUHlP87/uUPfleS9wQf2NhdzuRJWsDsduU2xxQhqEam/z0lAI0wqvR1DJl PyP3S/5v5NjRgpOwVC/NbwybscDQaz80y6p6BMOpwbpm+NON5pE8ZHEZz/sglp2wdMIYgSS+D9E ZlY4FYlnyJmU2EOuap5LE2mpW+YpKjIpD73bSULkLpIQpioRJY4B1ErwWLFPiqA3zwrpSMogbLR 5n8HjWry7LU4vE2M0y1n/3AKkNhlG2kn7vAPqKcH9xA42vKCZUK8wOiVYjwJz6ZTf0tP0OFCgGL 0cw/TDn1891BWiRDICzNaa1hfhGR/WuuJJsf/ANrmhyeWYQcHiP8dvGYUrEtQYJukfNrGqz8pvi vXq4W9bNG9oenwdz7/sa+HJ0Hn3FKLwWU6CBAq37WIti5aFXs+1HKpNaCF3ANZX72J5RZ30xDnR p5q264P1pYt8wQ9CzpTKFNXiln9VdNY1lRxY1wPxDOcYtUaM8Ufx3SLHKFrQ6hnUq8+nE= X-Developer-Key: i=max.hsu@sifive.com; a=openpgp; fpr=EA5E671B3A14B629913D5F68D203FD9D077940BD Svukte extension introduce senvcfg.UKTE, hstatus.HUKTE. This patch add CSR bit definition, and detects if Svukte ISA extension is available, cpufeature will set the correspond bit field so the svukte-qualified memory accesses are protected in a manner that is timing-independent of the faulting virtual address. Since hstatus.HU is not enabled by linux, enabling hstatus.HUKTE will not be affective. Reviewed-by: Samuel Holland Reviewed-by: Deepak Gupta Signed-off-by: Max Hsu --- arch/riscv/include/asm/csr.h | 2 ++ arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/kernel/cpufeature.c | 5 +++++ 3 files changed, 8 insertions(+) diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index fe5d4eb9adea1d4e3065a4d6e2ff361a52aecc44..67ff78f7e480bcbfef04e58191e= f85d5434f427e 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -126,6 +126,7 @@ #define HSTATUS_VSXL _AC(0x300000000, UL) #define HSTATUS_VSXL_SHIFT 32 #endif +#define HSTATUS_HUKTE _AC(0x01000000, UL) #define HSTATUS_VTSR _AC(0x00400000, UL) #define HSTATUS_VTW _AC(0x00200000, UL) #define HSTATUS_VTVM _AC(0x00100000, UL) @@ -203,6 +204,7 @@ #define ENVCFG_PMM_PMLEN_0 (_AC(0x0, ULL) << 32) #define ENVCFG_PMM_PMLEN_7 (_AC(0x2, ULL) << 32) #define ENVCFG_PMM_PMLEN_16 (_AC(0x3, ULL) << 32) +#define ENVCFG_UKTE (_AC(1, UL) << 8) #define ENVCFG_CBZE (_AC(1, UL) << 7) #define ENVCFG_CBCFE (_AC(1, UL) << 6) #define ENVCFG_CBIE_SHIFT 4 diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index 08d2a5697466d07fe2319a2423f04657177db37f..98488d8ebf528ff5cd494ab753d= 91b77accd2488 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -98,6 +98,7 @@ #define RISCV_ISA_EXT_SSNPM 89 #define RISCV_ISA_EXT_ZABHA 90 #define RISCV_ISA_EXT_ZICCRSE 91 +#define RISCV_ISA_EXT_SVUKTE 92 =20 #define RISCV_ISA_EXT_XLINUXENVCFG 127 =20 diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index eb904ca64ad03565c6d521350f5e6b4c5cb9c6d9..a38e40477f0123eb7e80b096a38= e0f956c9d4bc0 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -389,6 +389,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] =3D { __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT), __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT), + __RISCV_ISA_EXT_SUPERSET(svukte, RISCV_ISA_EXT_SVUKTE, riscv_xlinuxenvcfg= _exts), __RISCV_ISA_EXT_DATA(svvptc, RISCV_ISA_EXT_SVVPTC), }; 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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211d0f474fcsm92502505ad.213.2024.11.20.06.09.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Nov 2024 06:09:53 -0800 (PST) From: Max Hsu Date: Wed, 20 Nov 2024 22:09:34 +0800 Subject: [PATCH RFC v3 3/3] riscv: KVM: Add Svukte extension support for Guest/VM Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241120-dev-maxh-svukte-v3-v3-3-1e533d41ae15@sifive.com> References: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> In-Reply-To: <20241120-dev-maxh-svukte-v3-v3-0-1e533d41ae15@sifive.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Atish Patra Cc: Palmer Dabbelt , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Max Hsu , Samuel Holland X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1321; i=max.hsu@sifive.com; h=from:subject:message-id; bh=CJT0iMPgfMMKY590TyF/jv0a/eQmMMiUwvdaVlMZsfs=; b=owEB7QES/pANAwAKAdID/Z0HeUC9AcsmYgBnPe2kadvH5t/olEh4nZ968ktrx/equF2lYqvX8 y0+ccmYkHyJAbMEAAEKAB0WIQTqXmcbOhS2KZE9X2jSA/2dB3lAvQUCZz3tpAAKCRDSA/2dB3lA vQSQDACIUsjg3BUBC94txWJFJnsW+HdGsZK9TdrvP+9cahCFdSbYefBFYDX+F6qrGFGZ4xd1dZI FgYxgtdj1e571lb++BZPkfR4WVNcV3JrX5/B0UmnEXolTaLvraICuVl5r1gPmRDUbTKGlPGka/a hHMAQocMymw6cUu6/MM2ZTscgvJSzCEYgcdwJ9YPXvEKKsmaepFSBoZjfsL5SuJG/Ja3pyTgvCF X1/njUvmXBN5+VLfqj91GeLNPV5tCcYxZe1oLWqljxohLeXrEdmTy+4+1i6g4AsQi7vIsQs3Wzk cOy+tDP1uTNQrUQ6HVD8QT12FAUuH27qlxxJoSVy1YNWvDknVuM94hkLv7Y6O/eSNGNJGnlV1Kj I2IDHywxZohyBH7rV5Ny2An8bjvPfJHS1wf2r3G/gt6vNXu4qNDclE+TGyuawb4KxLkLtFx6RON DwJgbyToqac448RyXhmMEWoDDOMcfwnlsB7aqqbAFcN3VfhT4WQG7OlCWDJmnpSKyFbhw= X-Developer-Key: i=max.hsu@sifive.com; a=openpgp; fpr=EA5E671B3A14B629913D5F68D203FD9D077940BD Add KVM_RISCV_ISA_EXT_SVUKTE for VMM to detect the enablement or disablement the Svukte extension for Guest/VM Reviewed-by: Samuel Holland Signed-off-by: Max Hsu --- arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kvm/vcpu_onereg.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/as= m/kvm.h index 4f24201376b17215315cf1fb8888d0a562dc76ac..158f9253658c4c28a533b2bda17= 9fb48bf41e1fc 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -177,6 +177,7 @@ enum KVM_RISCV_ISA_EXT_ID { KVM_RISCV_ISA_EXT_ZAWRS, KVM_RISCV_ISA_EXT_SMNPM, KVM_RISCV_ISA_EXT_SSNPM, + KVM_RISCV_ISA_EXT_SVUKTE, KVM_RISCV_ISA_EXT_MAX, }; =20 diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c index 5b68490ad9b75fef6a18289d8c5cf9291594e01e..4c3a77cdeed0956e21e53d1ab4e= 948a170ac5c5c 100644 --- a/arch/riscv/kvm/vcpu_onereg.c +++ b/arch/riscv/kvm/vcpu_onereg.c @@ -43,6 +43,7 @@ static const unsigned long kvm_isa_ext_arr[] =3D { KVM_ISA_EXT_ARR(SVINVAL), KVM_ISA_EXT_ARR(SVNAPOT), KVM_ISA_EXT_ARR(SVPBMT), + KVM_ISA_EXT_ARR(SVUKTE), KVM_ISA_EXT_ARR(ZACAS), KVM_ISA_EXT_ARR(ZAWRS), KVM_ISA_EXT_ARR(ZBA), --=20 2.43.2