From patchwork Wed Aug 21 15:38:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13771884 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 4FA45C52D6F for ; Wed, 21 Aug 2024 16:05:35 +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=g3HP9jHFL0uyI+HLXng2OAzk6dNvk1KJb2THMZTOC6c=; b=L7UkiFbTpMfz5q3NRY2blhbkhn Th1UwuJf9j/lngV8E76ZfuDyo7DCMcwKyBmUXCoM4Ue661fu8vu0bCH9Gm43xY5pWNeln2tOBV9Z3 SXvAvhnM1HNq+5qwmlGGwXnGAM35jNW8mx2elHV/w2GXLEelQnqPk8TxzBGUJRduWhhQ5jr4m/C61 Iz8lf9W7BQmU3bjXbKx1DUZJN5PtabOyC+UNCAOXxN3wsPe0ZuPFQldhlJPbiITHvS4CEvkkEWeYJ 4hvMv+hYcomNT3fKalXzLRDrx66ifaKf1dT9YyzUdE2Q4RFfEQAzWzd1iz9BtyN2ZnmtAUTqae8XL LH9+Ty4w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgnps-00000009faY-1s7c; Wed, 21 Aug 2024 16:05:24 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sgnSR-00000009XgF-321o for linux-arm-kernel@lists.infradead.org; Wed, 21 Aug 2024 15:41:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6B5E5DA7; Wed, 21 Aug 2024 08:41:37 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.37.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A947A3F73B; Wed, 21 Aug 2024 08:41:07 -0700 (PDT) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun Subject: [PATCH v4 34/43] kvm: rme: Hide KVM_CAP_READONLY_MEM for realm guests Date: Wed, 21 Aug 2024 16:38:35 +0100 Message-Id: <20240821153844.60084-35-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240821153844.60084-1-steven.price@arm.com> References: <20240821153844.60084-1-steven.price@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240821_084111_833952_00084CCD X-CRM114-Status: GOOD ( 10.25 ) 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 protected memory read only isn't supported. While it may be possible to support read only for unprotected memory, this isn't supported at the present time. Signed-off-by: Steven Price --- arch/arm64/kvm/arm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index fe815a0d20bf..bd79a928d036 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -374,7 +374,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ONE_REG: case KVM_CAP_ARM_PSCI: case KVM_CAP_ARM_PSCI_0_2: - case KVM_CAP_READONLY_MEM: case KVM_CAP_MP_STATE: case KVM_CAP_IMMEDIATE_EXIT: case KVM_CAP_VCPU_EVENTS: @@ -388,6 +387,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_COUNTER_OFFSET: r = 1; break; + case KVM_CAP_READONLY_MEM: case KVM_CAP_SET_GUEST_DEBUG: r = !kvm_is_realm(kvm); break;