From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 92405CA5FCB for ; Thu, 1 Oct 2026 13:59:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=N2yaNPf9MjV1U306j4EESZzwqOuOGGByB5Oho4YPfls=; b=TYkz6WulBbbu8a2idz0Z40BcMj OB29TH+CGcv7F9nFmWtHRZ87T6fQ5AkelNjZ2fXx8//bd69OndkJUz+qarpUTf+fZkzL5cVttdloy X5YkLVCneTw8h9kVo/41t972NpKJgUxGfOrDHx67W4bLlgfV+msH1gSiyfJhlu/JB1Z+TamxKzmha L/9TqGd54xlDkRJ2VXUTRSGVFs/UqZuJANcixL0S+aq9aYDhQ6aMha53kfFtmVYHvwMogoN/2RMpB +XP55BJ4ctO64tQNS8X7562QQD8nwP48A1wMnDoudxF4Fy6n83TlPlBn4Xa1yHDNtCJZV6d7Sv3PA cyUhjzCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCHJn-00000009JXx-0BfA; Thu, 01 Oct 2026 13:59:27 +0000 Received: from out-140.mta0.migadu.com ([2001:41d0:1004:224b::8c] helo=mta0.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCHJi-00000009JT2-3tTG for linux-arm-kernel@lists.infradead.org; Thu, 01 Oct 2026 13:59:26 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org DKIM-Signature: a=rsa-sha256; bh=2tuch6nKrMgq3ucfEYUyfKrn4X670ODoqukWreMj99k=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1790863159; v=1; x=1791467959; b=kGQ3u0bu8q/b5y3BWXgMextMo6W1Ms88T3pOuObdDIPWBBB6ysHxLDr0eCAm9qXAc7fU2VX2 /4iiOxtS9gQWQgBrIkkOxxRzDKI6Vq7LcegHojmFUDvmcld/jldARnAW7gg1UKQZOa4Jp2tsEfp jwJ+7jnYD6pmGu1fTA1f/pTk= X-Envelope-To: linux-arm-kernel@lists.infradead.org Received: by smtp.migadu.com with ESMTPS id 4903d713226fb509; Thu, 01 Oct 2026 13:59:19 +0000 X-Mizu-Trace-ID: 4903d713226fb509 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: catalin.marinas@arm.com, will@kernel.org, joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, mark.rutland@arm.com, steven.price@arm.com, vdonnefort@google.com, qperret@google.com, tabba@google.com Subject: [PATCH v4 17/18] KVM: arm64: Advertise the capabilities that protected VMs support Date: Thu, 1 Oct 2026 14:57:10 +0100 Message-Id: <20261001135711.1640520-18-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20261001135711.1640520-1-fuad.tabba@linux.dev> References: <20261001135711.1640520-1-fuad.tabba@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261001_065923_114360_6A22B95E X-CRM114-Status: UNSURE ( 8.12 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For a protected VM, kvm_pkvm_ext_allowed() returns false on every capability it doesn't name, so KVM_CHECK_EXTENSION returns 0 for interfaces the VM implements: it 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 under the restrictions the preceding patches add, the vGIC and the I/O bus being host-managed. 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 fbea052fa3e16..a165af0d75689 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