From patchwork Tue Jan 7 22:59:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13929692 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 4675D1F76C2; Tue, 7 Jan 2025 23:01:25 +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=1736290885; cv=none; b=NNqzWhgZ50DEB4CAZOfYUW05jcn7Mav5bPItq7mDHOPeuW5zyWnjnuXr2AubrgRo0ZBwjr0+S0rUW5u1NZbP6NQ0vgtsGvwbWJ4Ho8/Zv6UZSxYCABk9GaplNjfjNUSuBQ9WiuJEcwHOPNBei/028tKFq2RlX9Cn8YFxzenSpD0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736290885; c=relaxed/simple; bh=W8fINH3OVANmdQFVX+js38cqXZpA2truKvR5K6znyyg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bcBcXCpgY4ojjg0NyqOh6RI8iOF6faKWoKaCIyJoDCTxSdSXfDVcUFFO3Jqng8GiIKqjDi6kENk0v+fRWZw3EGdbjMFcshjOoLuCr7jCgKxYJ/DkRzDmTa4l3N2xzQVjQnEYyzHwyUgVxRYEE3EOX9of2IIetbdhj40XovCL7Ro= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EIw6FR02; 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="EIw6FR02" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E54CC4CEDF; Tue, 7 Jan 2025 23:01:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736290884; bh=W8fINH3OVANmdQFVX+js38cqXZpA2truKvR5K6znyyg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=EIw6FR02ctl7z3kfIqI2bf77wi8c0QSzXjcmC89JQY4MtldCUJEBlMAGfS+Hg62a+ kvBj9dnEDE97fx3gB74HCAYWmwPkDRVxvLogNn+p9pUhzUi0wn3P3/ak4l9ylgZpdd SpZNgI5yPh2qQlblqT0PWDcMtlcY581OqY1A0pYTDCqPbhos63iw/q1g0s10Finvy/ Ec5CCOOPchxJv97KyXjiI+vN1Oml9ZCiiAkQvG30o8oVxOWSZAPdgkr64l+YeEtatt oXmxU8oCcQlAAN5NB1Qe0LHekVsvuA//WbbtKcxDXYjbIXZLHJ3Wmz3m0Vnp5H3SMA eVThIa+FZdLiA== From: Mark Brown Date: Tue, 07 Jan 2025 22:59:44 +0000 Subject: [PATCH v5 4/5] KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250107-arm64-2024-dpisa-v5-4-7578da51fc3d@kernel.org> References: <20250107-arm64-2024-dpisa-v5-0-7578da51fc3d@kernel.org> In-Reply-To: <20250107-arm64-2024-dpisa-v5-0-7578da51fc3d@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-1b0d6 X-Developer-Signature: v=1; a=openpgp-sha256; l=1413; i=broonie@kernel.org; h=from:subject:message-id; bh=W8fINH3OVANmdQFVX+js38cqXZpA2truKvR5K6znyyg=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBnfbIzV51I9sDzW6LbaKlT3yiu8P8lpBGtSObfUDPC dCxZk+eJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZ32yMwAKCRAk1otyXVSH0Gt9B/ 0b/5GPo8kXWfskPOztZz636lKq/ggWtkvBpiGDk3Br01bpbV68JWvM7908DnByeyzUJc+qFlAbR9ye IpRDbQ86HrpsNJwnmC5egOBqY/snrduWGMd7BIvUdv1Y88q46SpLRYj9k9y6KwefDDbL9OsTZzwonl pem+BRHEvKdUI+06b6fGWV922/2SsbMcQG/Af+81uIUJzAjDxMHWAbK5vDoDFtzoCDotezmI5wv7I+ vWST20DT1eAUliXKVw93xPYa7LIuuZQXQ78sr9EoWtzMPq8GvDC4F7nvADhXTpBzNr+VVmoa/q4Zhr xaFZLOiYk5Ri/uc4EHGNnE9IdvAhbz 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. Reviewed-by: Marc Zyngier 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 83c6b4a07ef56cf0ed9c8751ec80686f45dca6b2..6efbe3f4a579afd1874c4cf844c1c1249ae8b942 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1604,6 +1604,9 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu, if (!cpus_have_final_cap(ARM64_HAS_WFXT)) val &= ~ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_WFxT); break; + case SYS_ID_AA64ISAR3_EL1: + val &= ID_AA64ISAR3_EL1_FPRCVT | ID_AA64ISAR3_EL1_FAMINMAX; + break; case SYS_ID_AA64MMFR2_EL1: val &= ~ID_AA64MMFR2_EL1_CCIDX_MASK; break; @@ -2608,7 +2611,8 @@ static const struct sys_reg_desc sys_reg_descs[] = { 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),