From nobody Mon Nov 25 05:01:08 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EB48215C45; Wed, 30 Oct 2024 15:40:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730302853; cv=none; b=KUAHHCAJ3wsdMLHwAGGTPH7scSAe1obIB4SwhOP65l8xg49IiKYBmwI6IYTocZcFNOJ7woC1dCzFkMrhBL8DVPQKN70kD/E7HJWjOEnDJbvcFQtRvUZSm16lrH2EDJkSMO0G9QKP8vo0aWGhkWg8OZ5ubaGFqgoW7SKENw5Wzrw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730302853; c=relaxed/simple; bh=+e1UOR5/B0UfboGAjExW6hKwnbL8AeMxgKnzh/ZXops=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=giWu3zqqnhsmlEbBz59toLjihaguFLB/Si8dhFAXQmuJsEMWE4WqLEtbz4JSssZ1YCuZQBnc3pv22ADnk4iKohHNL7aWos76z0aZiE+NuRA+B3Mj7dJ2k/EJMCtMj1qpsU+KdlrQYSCvqUyDFMiynlkXjORGEIOd3M48veQ2LTw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZiGplVAK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZiGplVAK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79BC2C4CED3; Wed, 30 Oct 2024 15:40:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730302853; bh=+e1UOR5/B0UfboGAjExW6hKwnbL8AeMxgKnzh/ZXops=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ZiGplVAKP/U0sPI3zrjQwlgrORoD/Amz8RG2YL8LiSywrRHN2Cx53shmKrHXi4ZZJ IMlUNexuRk0B8sjORDsqyFAqjW1SKjOVbu9fRGtRl9g/o5D9vcj7ZPEKyqffWetv/E JwBkxiBpEonNAu2wwn2th5ekYTPmreqO3QpewtU43MtXa181QlF6jruQrUjazvErD3 bfNs6BFcfhM0IFx2hL+0iNtdjF1iFQBzLx4KTvk9vrLiHCTUXhB8+8pUEO51KjrbOT JauqfSLvvl8JsupLyDuZ3w6lkWvBrfI/8IqPKuqccvrQH+LMYwapChXM63t1Gbw4nA tLO+LsNaiTFFg== From: Mark Brown Date: Wed, 30 Oct 2024 15:34:53 +0000 Subject: [PATCH v2 8/9] KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1 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: <20241030-arm64-2024-dpisa-v2-8-b6601a15d2a5@kernel.org> References: <20241030-arm64-2024-dpisa-v2-0-b6601a15d2a5@kernel.org> In-Reply-To: <20241030-arm64-2024-dpisa-v2-0-b6601a15d2a5@kernel.org> To: Catalin Marinas , Will Deacon , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.15-dev-9b746 X-Developer-Signature: v=1; a=openpgp-sha256; l=1369; i=broonie@kernel.org; h=from:subject:message-id; bh=+e1UOR5/B0UfboGAjExW6hKwnbL8AeMxgKnzh/ZXops=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBnIlNnMV/Bo3GWRxDAxp2dKrn2r5xbzZLI28XXcyJj S/vf/W+JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZyJTZwAKCRAk1otyXVSH0MmrB/ 9Ayd4qbzVp0FBgF+pAqcgt/GZZQJDrGD3JEkOkV3oLoZ6HX5hGK1EC20D2lyeIhou+1QN7T3fPf/g6 hAym5gRgz1U+7RsMrWe0kL3dOVZJa3RWzBnEgLvZhAu3H8z5PPbnzjzsgeu4YCahJyWAiwJYoGJkmC DUiRdx46Ue7gTazRpesGHxh4bXETEnshESOaBNS0eyjd4bI/yXCEJXhZ4fJBcY0p9USu0L7omP+1qr e/y0TbChayabDX6HcYTAGjePCKLKa68Yb+mRjImKIc5G/9KDo3A4NHCIhSd4cqbsgJPYyH46/ViA7+ HLJE52nGLzQliFbGhwJ6jJgsR7t8Yl X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB ID_AA64ISAR3_EL1 is currently marked as unallocated in KVM but does have a number of bitfields defined in it. Expose FPRCVT and FAMINMAX, two simple instruction only extensions to guests. Signed-off-by: Mark Brown --- arch/arm64/kvm/sys_regs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index dad88e31f9537fe02e28b117d6a740f15572e0ba..926b6a1b2d2389e95721ce57774= 0a2fb740e4f6b 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1546,6 +1546,9 @@ static u64 __kvm_read_sanitised_id_reg(const struct k= vm_vcpu *vcpu, if (!cpus_have_final_cap(ARM64_HAS_WFXT)) val &=3D ~ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_WFxT); break; + case SYS_ID_AA64ISAR3_EL1: + val &=3D ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX; + break; case SYS_ID_AA64MMFR2_EL1: val &=3D ~ID_AA64MMFR2_EL1_CCIDX_MASK; break; @@ -2409,7 +2412,8 @@ static const struct sys_reg_desc sys_reg_descs[] =3D { ID_WRITABLE(ID_AA64ISAR2_EL1, ~(ID_AA64ISAR2_EL1_RES0 | ID_AA64ISAR2_EL1_APA3 | ID_AA64ISAR2_EL1_GPA3)), - ID_UNALLOCATED(6,3), + ID_WRITABLE(ID_AA64ISAR3_EL1, (ID_AA64ISAR3_EL1_FPRCVT | + ID_AA64ISAR3_EL1_FAMINMAX)), ID_UNALLOCATED(6,4), ID_UNALLOCATED(6,5), ID_UNALLOCATED(6,6), --=20 2.39.2