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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D81CC47096 for ; Thu, 3 Jun 2021 18:34:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35274613F4 for ; Thu, 3 Jun 2021 18:34:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229976AbhFCSfv (ORCPT ); Thu, 3 Jun 2021 14:35:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:51304 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229902AbhFCSfu (ORCPT ); Thu, 3 Jun 2021 14:35:50 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5F0D2613B1; Thu, 3 Jun 2021 18:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622745245; bh=aoxTolk8dCsad1y8K8HR18m0JTWcLPqsOTFqONlive0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N+fw/PVVPGRXMhC3TkqOpBuQgwJeHdfZr1v4uMmj+INdOrG/Rc2e8I+n2gO+kVOAM W3Bz9jK+g+A1y6utCu9QY+iI5vEtqMqFX3d4t3RicZ7tHp5ujp2iURHRLSRfPHFEdu hFhwHAlia7zxZ4ez9Skwa219IlitvrpqG9CDvrhk2kiRz31z0/GkXTmw19iFAVedPw bov/6bSX1dx1JQ2B5LPyUMmC0xG+lU3DvFEL2k2RyPgY/lAvlCYalCl+bpL6vv0Cjo 0c7C/43WkPYg2w4mvktVhA2MI3vr3PWTrsdZ2ytpP4C5xGEpkzpC5sMTNXZ7FHiOOF aV/49OEId7zsw== From: Will Deacon To: kvmarm@lists.cs.columbia.edu Cc: Will Deacon , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Mark Rutland , Christoffer Dall , Paolo Bonzini , Fuad Tabba , Quentin Perret , Sean Christopherson , David Brazdil , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/4] KVM: arm64: Parse reserved-memory node for pkvm guest firmware region Date: Thu, 3 Jun 2021 19:33:46 +0100 Message-Id: <20210603183347.1695-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210603183347.1695-1-will@kernel.org> References: <20210603183347.1695-1-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add support for a "linux,pkvm-guest-firmware-memory" reserved memory region, which can be used to identify a firmware image for protected VMs. Signed-off-by: Will Deacon --- arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/pkvm.c | 52 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/kvm/pkvm.c diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 589921392cb1..61e054411831 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -14,7 +14,7 @@ kvm-y := $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o \ $(KVM)/vfio.o $(KVM)/irqchip.o \ arm.o mmu.o mmio.o psci.o perf.o hypercalls.o pvtime.o \ inject_fault.o va_layout.o handle_exit.o \ - guest.o debug.o reset.o sys_regs.o \ + guest.o debug.o pkvm.o reset.o sys_regs.o \ vgic-sys-reg-v3.o fpsimd.o pmu.o \ arch_timer.o trng.o\ vgic/vgic.o vgic/vgic-init.o \ diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c new file mode 100644 index 000000000000..7af5d03a3941 --- /dev/null +++ b/arch/arm64/kvm/pkvm.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * KVM host (EL1) interface to Protected KVM (pkvm) code at EL2. + * + * Copyright (C) 2021 Google LLC + * Author: Will Deacon + */ + +#include +#include +#include +#include + +static struct reserved_mem *pkvm_firmware_mem; + +static int __init pkvm_firmware_rmem_err(struct reserved_mem *rmem, + const char *reason) +{ + phys_addr_t end = rmem->base + rmem->size; + + kvm_err("Ignoring pkvm guest firmware memory reservation [%pa - %pa]: %s\n", + &rmem->base, &end, reason); + return -EINVAL; +} + +static int __init pkvm_firmware_rmem_init(struct reserved_mem *rmem) +{ + unsigned long node = rmem->fdt_node; + + if (kvm_get_mode() != KVM_MODE_PROTECTED) + return pkvm_firmware_rmem_err(rmem, "protected mode not enabled"); + + if (pkvm_firmware_mem) + return pkvm_firmware_rmem_err(rmem, "duplicate reservation"); + + if (!of_get_flat_dt_prop(node, "no-map", NULL)) + return pkvm_firmware_rmem_err(rmem, "missing \"no-map\" property"); + + if (of_get_flat_dt_prop(node, "reusable", NULL)) + return pkvm_firmware_rmem_err(rmem, "\"reusable\" property unsupported"); + + if (!PAGE_ALIGNED(rmem->base)) + return pkvm_firmware_rmem_err(rmem, "base is not page-aligned"); + + if (!PAGE_ALIGNED(rmem->size)) + return pkvm_firmware_rmem_err(rmem, "size is not page-aligned"); + + pkvm_firmware_mem = rmem; + return 0; +} +RESERVEDMEM_OF_DECLARE(pkvm_firmware, "linux,pkvm-guest-firmware-memory", + pkvm_firmware_rmem_init); -- 2.32.0.rc0.204.g9fa02ecfa5-goog 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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4371C47096 for ; Thu, 3 Jun 2021 18:34:10 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 7A862613D7 for ; Thu, 3 Jun 2021 18:34:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7A862613D7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1A7044B10E; Thu, 3 Jun 2021 14:34:10 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e4vdK8gUWE3N; Thu, 3 Jun 2021 14:34:08 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E182B4B10C; Thu, 3 Jun 2021 14:34:08 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 9E56A4B110 for ; Thu, 3 Jun 2021 14:34:07 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6vTz14YONqvK for ; Thu, 3 Jun 2021 14:34:06 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 8343D4B0BA for ; Thu, 3 Jun 2021 14:34:06 -0400 (EDT) Received: by mail.kernel.org (Postfix) with ESMTPSA id 5F0D2613B1; Thu, 3 Jun 2021 18:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622745245; bh=aoxTolk8dCsad1y8K8HR18m0JTWcLPqsOTFqONlive0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N+fw/PVVPGRXMhC3TkqOpBuQgwJeHdfZr1v4uMmj+INdOrG/Rc2e8I+n2gO+kVOAM W3Bz9jK+g+A1y6utCu9QY+iI5vEtqMqFX3d4t3RicZ7tHp5ujp2iURHRLSRfPHFEdu hFhwHAlia7zxZ4ez9Skwa219IlitvrpqG9CDvrhk2kiRz31z0/GkXTmw19iFAVedPw bov/6bSX1dx1JQ2B5LPyUMmC0xG+lU3DvFEL2k2RyPgY/lAvlCYalCl+bpL6vv0Cjo 0c7C/43WkPYg2w4mvktVhA2MI3vr3PWTrsdZ2ytpP4C5xGEpkzpC5sMTNXZ7FHiOOF aV/49OEId7zsw== From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH 3/4] KVM: arm64: Parse reserved-memory node for pkvm guest firmware region Date: Thu, 3 Jun 2021 19:33:46 +0100 Message-Id: <20210603183347.1695-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210603183347.1695-1-will@kernel.org> References: <20210603183347.1695-1-will@kernel.org> MIME-Version: 1.0 Cc: kvm@vger.kernel.org, Marc Zyngier , linux-arm-kernel@lists.infradead.org, Sean Christopherson , Paolo Bonzini , Will Deacon X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add support for a "linux,pkvm-guest-firmware-memory" reserved memory region, which can be used to identify a firmware image for protected VMs. Signed-off-by: Will Deacon --- arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/pkvm.c | 52 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/kvm/pkvm.c diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 589921392cb1..61e054411831 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -14,7 +14,7 @@ kvm-y := $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o \ $(KVM)/vfio.o $(KVM)/irqchip.o \ arm.o mmu.o mmio.o psci.o perf.o hypercalls.o pvtime.o \ inject_fault.o va_layout.o handle_exit.o \ - guest.o debug.o reset.o sys_regs.o \ + guest.o debug.o pkvm.o reset.o sys_regs.o \ vgic-sys-reg-v3.o fpsimd.o pmu.o \ arch_timer.o trng.o\ vgic/vgic.o vgic/vgic-init.o \ diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c new file mode 100644 index 000000000000..7af5d03a3941 --- /dev/null +++ b/arch/arm64/kvm/pkvm.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * KVM host (EL1) interface to Protected KVM (pkvm) code at EL2. + * + * Copyright (C) 2021 Google LLC + * Author: Will Deacon + */ + +#include +#include +#include +#include + +static struct reserved_mem *pkvm_firmware_mem; + +static int __init pkvm_firmware_rmem_err(struct reserved_mem *rmem, + const char *reason) +{ + phys_addr_t end = rmem->base + rmem->size; + + kvm_err("Ignoring pkvm guest firmware memory reservation [%pa - %pa]: %s\n", + &rmem->base, &end, reason); + return -EINVAL; +} + +static int __init pkvm_firmware_rmem_init(struct reserved_mem *rmem) +{ + unsigned long node = rmem->fdt_node; + + if (kvm_get_mode() != KVM_MODE_PROTECTED) + return pkvm_firmware_rmem_err(rmem, "protected mode not enabled"); + + if (pkvm_firmware_mem) + return pkvm_firmware_rmem_err(rmem, "duplicate reservation"); + + if (!of_get_flat_dt_prop(node, "no-map", NULL)) + return pkvm_firmware_rmem_err(rmem, "missing \"no-map\" property"); + + if (of_get_flat_dt_prop(node, "reusable", NULL)) + return pkvm_firmware_rmem_err(rmem, "\"reusable\" property unsupported"); + + if (!PAGE_ALIGNED(rmem->base)) + return pkvm_firmware_rmem_err(rmem, "base is not page-aligned"); + + if (!PAGE_ALIGNED(rmem->size)) + return pkvm_firmware_rmem_err(rmem, "size is not page-aligned"); + + pkvm_firmware_mem = rmem; + return 0; +} +RESERVEDMEM_OF_DECLARE(pkvm_firmware, "linux,pkvm-guest-firmware-memory", + pkvm_firmware_rmem_init); -- 2.32.0.rc0.204.g9fa02ecfa5-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41749C47096 for ; Thu, 3 Jun 2021 18:36:51 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 13DC5613D7 for ; Thu, 3 Jun 2021 18:36:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 13DC5613D7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GFBGaPB8AYuOUuWXZEjUTNV3Lp76t89ce+yXyptOwuI=; b=vmichddXFxMvta rch20lSwzViY8FdFpXwzuJw80ysOCVtKq6Qg1SfpG5VK2+7mV8aWBlTHSRTdfVLtdLiynx2D1PKAv m63/i1OvoZJcgAJTklYbQdfb3A39aotprOu/wO1WHWnsUwbhpJ5Z6jUfcQNwVeSpTRvNaBk9tjzrM BdCvbUQ04yPOXfQ/4wocSfu7nwBjCFZcVH/zJ09oYhNdBLcbAkDkUefvEIGwXl1K5U7W3jSHDfmbg C8UFGYz5Zo2nN4DjecNzg1nBBEe49jtsFaNBozXxC6puQi8Lf6qQM/5Z+gsrgPSw/+/e6bNQGn3SD /DOGxEJgfbdiQsKoqRsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1losAr-00ACJl-E4; Thu, 03 Jun 2021 18:34:33 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1losAQ-00ACHW-1e for linux-arm-kernel@lists.infradead.org; Thu, 03 Jun 2021 18:34:07 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5F0D2613B1; Thu, 3 Jun 2021 18:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622745245; bh=aoxTolk8dCsad1y8K8HR18m0JTWcLPqsOTFqONlive0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N+fw/PVVPGRXMhC3TkqOpBuQgwJeHdfZr1v4uMmj+INdOrG/Rc2e8I+n2gO+kVOAM W3Bz9jK+g+A1y6utCu9QY+iI5vEtqMqFX3d4t3RicZ7tHp5ujp2iURHRLSRfPHFEdu hFhwHAlia7zxZ4ez9Skwa219IlitvrpqG9CDvrhk2kiRz31z0/GkXTmw19iFAVedPw bov/6bSX1dx1JQ2B5LPyUMmC0xG+lU3DvFEL2k2RyPgY/lAvlCYalCl+bpL6vv0Cjo 0c7C/43WkPYg2w4mvktVhA2MI3vr3PWTrsdZ2ytpP4C5xGEpkzpC5sMTNXZ7FHiOOF aV/49OEId7zsw== From: Will Deacon To: kvmarm@lists.cs.columbia.edu Cc: Will Deacon , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Mark Rutland , Christoffer Dall , Paolo Bonzini , Fuad Tabba , Quentin Perret , Sean Christopherson , David Brazdil , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/4] KVM: arm64: Parse reserved-memory node for pkvm guest firmware region Date: Thu, 3 Jun 2021 19:33:46 +0100 Message-Id: <20210603183347.1695-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210603183347.1695-1-will@kernel.org> References: <20210603183347.1695-1-will@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210603_113406_141315_D0242C03 X-CRM114-Status: GOOD ( 15.57 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add support for a "linux,pkvm-guest-firmware-memory" reserved memory region, which can be used to identify a firmware image for protected VMs. Signed-off-by: Will Deacon --- arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/pkvm.c | 52 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/kvm/pkvm.c diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 589921392cb1..61e054411831 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -14,7 +14,7 @@ kvm-y := $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o \ $(KVM)/vfio.o $(KVM)/irqchip.o \ arm.o mmu.o mmio.o psci.o perf.o hypercalls.o pvtime.o \ inject_fault.o va_layout.o handle_exit.o \ - guest.o debug.o reset.o sys_regs.o \ + guest.o debug.o pkvm.o reset.o sys_regs.o \ vgic-sys-reg-v3.o fpsimd.o pmu.o \ arch_timer.o trng.o\ vgic/vgic.o vgic/vgic-init.o \ diff --git a/arch/arm64/kvm/pkvm.c b/arch/arm64/kvm/pkvm.c new file mode 100644 index 000000000000..7af5d03a3941 --- /dev/null +++ b/arch/arm64/kvm/pkvm.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * KVM host (EL1) interface to Protected KVM (pkvm) code at EL2. + * + * Copyright (C) 2021 Google LLC + * Author: Will Deacon + */ + +#include +#include +#include +#include + +static struct reserved_mem *pkvm_firmware_mem; + +static int __init pkvm_firmware_rmem_err(struct reserved_mem *rmem, + const char *reason) +{ + phys_addr_t end = rmem->base + rmem->size; + + kvm_err("Ignoring pkvm guest firmware memory reservation [%pa - %pa]: %s\n", + &rmem->base, &end, reason); + return -EINVAL; +} + +static int __init pkvm_firmware_rmem_init(struct reserved_mem *rmem) +{ + unsigned long node = rmem->fdt_node; + + if (kvm_get_mode() != KVM_MODE_PROTECTED) + return pkvm_firmware_rmem_err(rmem, "protected mode not enabled"); + + if (pkvm_firmware_mem) + return pkvm_firmware_rmem_err(rmem, "duplicate reservation"); + + if (!of_get_flat_dt_prop(node, "no-map", NULL)) + return pkvm_firmware_rmem_err(rmem, "missing \"no-map\" property"); + + if (of_get_flat_dt_prop(node, "reusable", NULL)) + return pkvm_firmware_rmem_err(rmem, "\"reusable\" property unsupported"); + + if (!PAGE_ALIGNED(rmem->base)) + return pkvm_firmware_rmem_err(rmem, "base is not page-aligned"); + + if (!PAGE_ALIGNED(rmem->size)) + return pkvm_firmware_rmem_err(rmem, "size is not page-aligned"); + + pkvm_firmware_mem = rmem; + return 0; +} +RESERVEDMEM_OF_DECLARE(pkvm_firmware, "linux,pkvm-guest-firmware-memory", + pkvm_firmware_rmem_init); -- 2.32.0.rc0.204.g9fa02ecfa5-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel