From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.237 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792914716; b=S81fv9tpYEgtQ1ajoK3PbViGtWU0IzZd86UtT3gkgamGl7/RBysykacnjxT5kxqVt518 U/YnD/Xp5KW+I5WCqPhbWt2JcWXmTqsVQKCE1XnWBMNIJfOndAovpO8B9l/0i4vJfZQGv jJ2WsbioxWeJ0gNOZkxIAN1DfBE9fAGUsh7ztXuW9srZEWVYfqBf/AymBAXHwATtD0YbI /VeS5g0fjGyO8sy9Of26CxfMtsakJ1NJKBeV4zabbJqNtDAEAjn20QhY7FhtGqG3ZBIt5 FULIZFluv/jk+7qvvtsAmw8Kk16e5hYgmN8NZGbUDEz5G6pq0/8867SW9OJ9oJDymMA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792914716; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=ZBJQD9CEX8BSoBmqxIKznqV9jSK1F+2qL8QO29Cd7to=; b=vAlN0AnjY/IhLkUf+XhlfpTbrwKZ/k/CbiHQy629T6kObO1F8kUuiQYENlWxLuymI8F9 6nKhvUTWKmBKYZPmm0N3wz2QgdwYJndNUTnqFHhEJ2mu/9z077vYznWEp4j3BBp4CiQy/ bL80egidCv+cZz13pX/ug2C99wKF6FvDARr6Z5Os4bcCxg87sessYdFDgFY8/dR2ECcH1 yoHQ4XfGzCNsBE0PagMPI0o4LjcNPBzDgkKqD+fLihc31i+y9tF+pVcRz3ixDbylWYcJU BSAwaa36RZleBu7nu90TX9DVKSLA2HV3/XQie9Hw9rfQhEvII1MMHM/64wOu5QC9lYA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b="n/kLLYr8"; arc=none smtp.remote-ip=91.218.175.237 Received: from mta0.migadu.com (out-237.mta0.migadu.com [91.218.175.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6287A606A31E for ; Sun, 25 Oct 2026 07:51:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 6287A606A31E Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=n/kLLYr8 X-Envelope-To: kvmarm@lists.linux.dev DKIM-Signature: a=rsa-sha256; bh=4/HL2d4Nrhce67FzGis9vXGrK25cQYCUC9c0XAxPHEk=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792914713; v=1; x=1793519513; b=n/kLLYr8dscJbvlScpg92+xPBfNLNwxn35iqvYOUP/RSRSYfC1M+Aa649LCqbY1/ND4BdHbM wrhM3EvT/dAMsjaHqhxhD7ii2xHbi5fib28O2wpkQUvNFuBJPeJWFoVpMjMsI89WzpH9WKOpafZ r3Tdzh08BXpsgpTcaStnMY+c= X-Envelope-To: kvmarm@lists.linux.dev Received: by smtp.migadu.com with ESMTPS id 0235f86465034b12; Sun, 25 Oct 2026 07:51:53 +0000 X-Mizu-Trace-ID: 0235f86465034b12 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas , Will Deacon , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , Mark Rutland , Yicong Yang , Zhou Wang , Arnd Bergmann , Fuad Tabba , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/5] KVM: arm64: Add ACCDATA_EL1 to the sysreg array Date: Sun, 25 Oct 2026 07:51:35 +0000 Message-ID: <20261025075138.2919734-3-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261025075138.2919734-1-fuad.tabba@linux.dev> References: <20261025075138.2919734-1-fuad.tabba@linux.dev> X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Marc Zyngier Make ACCDATA_EL1 a first-class citizen, and add it to the sysreg array. Visibility is conditioned on the feature being enabled. Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20240815125959.2097734-4-maz@kernel.org [Fuad: rebased] Cc: stable@vger.kernel.org Signed-off-by: Fuad Tabba --- arch/arm64/include/asm/kvm_host.h | 3 +++ arch/arm64/kvm/sys_regs.c | 12 +++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 27fe0cd5b2d7a..5b1cd1f502b7d 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -498,6 +498,9 @@ enum vcpu_sysreg { GCR_EL1, /* Tag Control Register */ TFSRE0_EL1, /* Tag Fault Status Register (EL0) */ + /* Random stuff */ + ACCDATA_EL1, /* Accelerator Data */ + POR_EL0, /* Permission Overlay Register 0 (EL0) */ /* FP/SIMD/SVE */ diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 44aae52c473d7..40f8be41da3a4 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2914,6 +2914,15 @@ static unsigned int sve_el2_visibility(const struct kvm_vcpu *vcpu, return __el2_visibility(vcpu, rd, sve_visibility); } +static unsigned int accdata_visibility(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *rd) +{ + if (kvm_has_feat(vcpu->kvm, ID_AA64ISAR1_EL1, LS64, LS64_ACCDATA)) + return 0; + + return REG_HIDDEN; +} + static unsigned int vncr_el2_visibility(const struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd) { @@ -3601,7 +3610,8 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_CONTEXTIDR_EL1), access_vm_reg, reset_val, CONTEXTIDR_EL1, 0 }, { SYS_DESC(SYS_TPIDR_EL1), NULL, reset_unknown, TPIDR_EL1 }, - { SYS_DESC(SYS_ACCDATA_EL1), undef_access }, + { SYS_DESC(SYS_ACCDATA_EL1), undef_access, reset_val, ACCDATA_EL1, 0, + .visibility = accdata_visibility}, { SYS_DESC(SYS_SCXTNUM_EL1), undef_access }, -- 2.47.3