From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-58.mta0.migadu.com [91.218.175.58]) (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 6182C44E659 for ; Mon, 31 Aug 2026 16:34:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.58 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788194066; cv=none; b=PpIMekXdn0v0FErvI/3nmwFSbNZiX11hNSJKNUq6cSRwVqzfhym6yPEfvBLnrYjVgvJywQ1K8K5Zhm4Ktd5SLUWs6wfUmhtLNPR1kYibybjOXJDK6VDHNrpLFIrPoo8PHN0LG1URLtnd8i3nDQ3B/Okk5wlS7d76SMjPr9q7sSs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788194066; c=relaxed/simple; bh=FNewsXbgZk6ir7Tq/DaFYrMHnt1LVf+kHlt1OXPPVRQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=EJzPG58np48+MZ3edqPBPU0azzjoF8zKJ8V/niphuwSNPY0bMGROHs7zWtPqyfBspBZsZgGiXYx1v+XkSWTzDBSYPYWTWAKti5mhIy0VFT8Hv1QuGnUOmwXRBCEqElUxhRdAdUKnwkGXSewr+eDTE4mS6NQd6K7u0DOoE0X+oL0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=PG9dyAEN; arc=none smtp.client-ip=91.218.175.58 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) header.d=linux.dev header.i=@linux.dev header.b="PG9dyAEN" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=FNewsXbgZk6ir7Tq/DaFYrMHnt1LVf+kHlt1OXPPVRQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788194063; v=1; x=1788798863; b=PG9dyAEND8VSa8noM1PtoqkPn7vLScwS6NbOplgGV5p6S5EVBWZn5rbU8XVR7E9xRTPifAWM faWo9HN+mpbLgAzLlTuHkJjc+jYmuetKFAl3LoSM5jjfzJvoN7snrAcGWiXKvibiVVpfRwwJRs2 d80Wpd9nPEG0QMppjXINcERY= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id b210bfa048418e89; Mon, 31 Aug 2026 16:34:23 +0000 X-Mizu-Trace-ID: b210bfa048418e89 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Vincent Donnefort , Quentin Perret , Fuad Tabba Subject: [PATCH 02/17] KVM: arm64: Advertise the capabilities that protected VMs support Date: Mon, 31 Aug 2026 17:34:06 +0100 Message-Id: <20260831163421.272420-3-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260831163421.272420-1-fuad.tabba@linux.dev> References: <20260831163421.272420-1-fuad.tabba@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit kvm_pkvm_ext_allowed() denies every capability it does not name, so a protected VM reports 0 for interfaces it implements: KVM_CHECK_EXTENSION denies KVM_CAP_ONE_REG while KVM_{GET,SET}_ONE_REG stage the guest's boot state. Allow the capabilities that work for a protected guest, the vGIC and the I/O bus being host-managed, subject to the restrictions the rest of this series adds. Signed-off-by: Fuad Tabba --- arch/arm64/include/asm/kvm_pkvm.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h index beea00e693a0a..c4c834d55e503 100644 --- a/arch/arm64/include/asm/kvm_pkvm.h +++ b/arch/arm64/include/asm/kvm_pkvm.h @@ -42,6 +42,15 @@ static inline bool kvm_pkvm_ext_allowed(struct kvm *kvm, long ext) case KVM_CAP_ARM_VM_IPA_SIZE: case KVM_CAP_ARM_PTRAUTH_ADDRESS: case KVM_CAP_ARM_PTRAUTH_GENERIC: + case KVM_CAP_ONE_REG: + case KVM_CAP_MP_STATE: + case KVM_CAP_VCPU_EVENTS: + case KVM_CAP_VCPU_ATTRIBUTES: + case KVM_CAP_IMMEDIATE_EXIT: + case KVM_CAP_IOEVENTFD: + case KVM_CAP_IRQFD_RESAMPLE: + case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2: + case KVM_CAP_ARM_INJECT_SERROR_ESR: return true; case KVM_CAP_ARM_MTE: return false; -- 2.39.5