From patchwork Mon Jan 22 16:28:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 764955 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 F0DF26774D; Mon, 22 Jan 2024 16:28:33 +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=1705940914; cv=none; b=stBQwGpK6JL838Fy8uZUOJulCvx76LWWpuR9te5TDgWnGsDX08pBcoZXOlUQisrwMyHCQE7tBv9i5AbeEubUW7zmb/obJhypxuns9n4sUqudp8clicDBmXxbdlK4HBxKEYsc3vZBe/064+Xcynfu0RWp4rlM8HmqS3msF31Uynk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705940914; c=relaxed/simple; bh=Qp/OLT7QLi4uk/x6r4Fkb7gvrzfeB7lceJVKTlrTKU0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uatbYq8vyyHkviNBU6CGZQCByWwE66z9cWXH8416BPXyfzNpal9QHl1mrMdboIAzxvUuha/dwtYU/kOJKE+UmaPmYdRq3wJvsmiGovy4ZLO6NcwueYZE4rLSYBmWzxLATcQ8E5SpLVd+XHTBWZAt30ABJhmqOXr5lLGVAyy4BB8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mJBd4t8W; 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="mJBd4t8W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73A90C43390; Mon, 22 Jan 2024 16:28:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705940913; bh=Qp/OLT7QLi4uk/x6r4Fkb7gvrzfeB7lceJVKTlrTKU0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=mJBd4t8Wz6DQYM52XvR1xzeJT76x93XM4CBh9LG6VHAPu0HfY1g4lM4jxyWTXBezX AqXM0knEHnLvLpzwSK+GnLXnvO+y/1dPgTClV2BhZ0Hop+jeqawCipI7xs6jzWn+s4 wS5nJFQ9Zsns0L1dgG+Yv6cOHSLDwFl402uknGVo0SGxe8PH2ifXI1BelWaJ66jQKR nulaAboEGn/ESXabiGjyMjCcyX1TpO47YXQTghkhbu/WwHT0KEDmZCShwUyrdG5uFz 3nzur7dhfpMOwRfnPznlXU+LCGcH9cwgCiwic6fdkRrwduUQLvy71msqEyyN5l0nHw ASWSgqR6k5G2A== From: Mark Brown Date: Mon, 22 Jan 2024 16:28:05 +0000 Subject: [PATCH v4 02/14] arm64/fpsimd: Enable host kernel access to FPMR Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240122-arm64-2023-dpisa-v4-2-776e094861df@kernel.org> References: <20240122-arm64-2023-dpisa-v4-0-776e094861df@kernel.org> In-Reply-To: <20240122-arm64-2023-dpisa-v4-0-776e094861df@kernel.org> To: Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Jonathan Corbet , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave Martin , kvmarm@lists.linux.dev, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-5c066 X-Developer-Signature: v=1; a=openpgp-sha256; l=1042; i=broonie@kernel.org; h=from:subject:message-id; bh=Qp/OLT7QLi4uk/x6r4Fkb7gvrzfeB7lceJVKTlrTKU0=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlrpec4p+G3EKXzQYPPBophA42SzK8ipBGJr+BQD+Y 4h4az9SJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZa6XnAAKCRAk1otyXVSH0APPB/ 9xqKY6eNJoqiWFlOSWK23QCd5rnjH3s/Kwah7jqWMC5p74IUPkIAyjJ0g30PqPJOm+cRQY+C2YtAP/ 0f86fU80gP45qXi6UQxtZWH4zMEEgVMjrIAl1LNBqITyqwggoOYmoMfECskFmpZNaLYJbtwkwgwN+H Xb9++lrRSPSoFZAu4QugFYofnRXIZ2PF74A+S9oGCKtcBdsyYhvEZ538xIV9xndSQ4CcIXvbTJ1SKu hMr1g63KI8nzOKJTW6i7xJFyIGwH9jH6VF5Q38ETcqXmes7GU0zCTwAJzPhLuZwta/T3eCuTs1y1/U 3+pPBVhIVNBW2O0eF+Wz/+sBR8LS0b X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB FEAT_FPMR provides a new generally accessible architectural register FPMR. This is only accessible to EL0 and EL1 when HCRX_EL2.EnFPM is set to 1, do this when the host is running. The guest part will be done along with context switching the new register and exposing it via guest management. Signed-off-by: Mark Brown Acked-by: Marc Zyngier --- arch/arm64/include/asm/kvm_arm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 3c6f8ba1e479..7f45ce9170bb 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -105,7 +105,7 @@ #define HCRX_GUEST_FLAGS \ (HCRX_EL2_SMPME | HCRX_EL2_TCR2En | \ (cpus_have_final_cap(ARM64_HAS_MOPS) ? (HCRX_EL2_MSCEn | HCRX_EL2_MCE2) : 0)) -#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En) +#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM) /* TCR_EL2 Registers bits */ #define TCR_EL2_DS (1UL << 32)