From patchwork Tue May 14 22:43:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Kisel X-Patchwork-Id: 796760 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5D181182C84; Tue, 14 May 2024 22:45:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715726729; cv=none; b=LaDQzMHw712vGXMPv3GkleZMeyXjyE4SH/w1kC2JWz4sQwwxuHPsdsXOUu9iDRBikZV+pHsAKCYhE9c/zsg0KJrOYrAKKimxEewkC01twQ4faxiABiFLDfZkNYYWQNCXPpY5cKefz1PHwIm6CDGXatkmXXktRWnOwuiGrbSMdSw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715726729; c=relaxed/simple; bh=m1EKDirdZpUbxvw3NHD2qWkIJ2cXErTIJKMOLmmOMzA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ptBPHM5fcJbpYYYdLTvLNrMFG7qK8CnkP22OvpiTYD9sPYyu8kq+RrClA4uMK6TpJ/a1TJCtYbOxR8CTg/BQA1l3V+UtiHK1ah7ci1Ix1LYPEqJ9gzCEWXM3Gg50ey557w99Xsvjj2oaxM1DKZvdV2raeT7EFFLrxlomRBxgwYw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=SwOwHpg8; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="SwOwHpg8" Received: from xps-8930.corp.microsoft.com (unknown [131.107.160.48]) by linux.microsoft.com (Postfix) with ESMTPSA id BA19E2095D0E; Tue, 14 May 2024 15:45:21 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com BA19E2095D0E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1715726721; bh=d0mCVW38qQkjcmLn2COs13T+MEUBOqchbANwckpZQ8g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SwOwHpg8b4yjKsK8r6039KVFLe3cfIcdai0uztt+5O2dRSN62hNU0D8MgYgRr8eqY 0ukf2TL8bjBWnJlPjwUXhIEWIA0SrXN02lWSUWkIEWkqTrKpQv1X+aHjTbxtXtLSe7 91OvV72T6CiRm9XOOTWXMe6ChBi+2Cv61MUXpT6c= From: Roman Kisel To: arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, catalin.marinas@arm.com, dave.hansen@linux.intel.com, decui@microsoft.com, haiyangz@microsoft.com, hpa@zytor.com, kw@linux.com, kys@microsoft.com, lenb@kernel.org, lpieralisi@kernel.org, mingo@redhat.com, mhklinux@outlook.com, rafael@kernel.org, robh@kernel.org, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org Cc: ssengar@microsoft.com, sunilmut@microsoft.com, vdso@hexbites.dev Subject: [PATCH v2 4/6] arm64/hyperv: Boot in a Virtual Trust Level Date: Tue, 14 May 2024 15:43:51 -0700 Message-ID: <20240514224508.212318-5-romank@linux.microsoft.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240514224508.212318-1-romank@linux.microsoft.com> References: <20240514224508.212318-1-romank@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To run in the VTL mode, Hyper-V drivers have to know what VTL the system boots in, and the arm64/hyperv code does not update the variable that stores the value. Update the variable to enable the Hyper-V drivers to boot in the VTL mode and print the VTL the code runs in. Signed-off-by: Roman Kisel --- arch/arm64/hyperv/Makefile | 1 + arch/arm64/hyperv/hv_vtl.c | 19 +++++++++++++++++++ arch/arm64/hyperv/mshyperv.c | 6 ++++++ arch/arm64/include/asm/mshyperv.h | 8 ++++++++ arch/x86/hyperv/hv_vtl.c | 2 +- 5 files changed, 35 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/hyperv/hv_vtl.c diff --git a/arch/arm64/hyperv/Makefile b/arch/arm64/hyperv/Makefile index 87c31c001da9..9701a837a6e1 100644 --- a/arch/arm64/hyperv/Makefile +++ b/arch/arm64/hyperv/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 obj-y := hv_core.o mshyperv.o +obj-$(CONFIG_HYPERV_VTL_MODE) += hv_vtl.o diff --git a/arch/arm64/hyperv/hv_vtl.c b/arch/arm64/hyperv/hv_vtl.c new file mode 100644 index 000000000000..9b44cc49594c --- /dev/null +++ b/arch/arm64/hyperv/hv_vtl.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023, Microsoft, Inc. + * + * Author : Roman Kisel + */ + +#include + +void __init hv_vtl_init_platform(void) +{ + pr_info("Linux runs in Hyper-V Virtual Trust Level %d\n", ms_hyperv.vtl); +} + +int __init hv_vtl_early_init(void) +{ + return 0; +} +early_initcall(hv_vtl_early_init); diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c index 208a3bcb9686..cbde483b167a 100644 --- a/arch/arm64/hyperv/mshyperv.c +++ b/arch/arm64/hyperv/mshyperv.c @@ -96,6 +96,12 @@ static int __init hyperv_init(void) return ret; } + /* Find the VTL */ + ms_hyperv.vtl = get_vtl(); + if (ms_hyperv.vtl > 0) /* non default VTL */ + hv_vtl_early_init(); + + hv_vtl_init_platform(); ms_hyperv_late_init(); hyperv_initialized = true; diff --git a/arch/arm64/include/asm/mshyperv.h b/arch/arm64/include/asm/mshyperv.h index a975e1a689dd..4a8ff6be389c 100644 --- a/arch/arm64/include/asm/mshyperv.h +++ b/arch/arm64/include/asm/mshyperv.h @@ -49,6 +49,14 @@ static inline u64 hv_get_msr(unsigned int reg) ARM_SMCCC_OWNER_VENDOR_HYP, \ HV_SMCCC_FUNC_NUMBER) +#ifdef CONFIG_HYPERV_VTL_MODE +void __init hv_vtl_init_platform(void); +int __init hv_vtl_early_init(void); +#else +static inline void __init hv_vtl_init_platform(void) {} +static inline int __init hv_vtl_early_init(void) { return 0; } +#endif + #include #endif diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c index 92bd5a55f093..ae3105375a12 100644 --- a/arch/x86/hyperv/hv_vtl.c +++ b/arch/x86/hyperv/hv_vtl.c @@ -19,7 +19,7 @@ static struct real_mode_header hv_vtl_real_mode_header; void __init hv_vtl_init_platform(void) { - pr_info("Linux runs in Hyper-V Virtual Trust Level\n"); + pr_info("Linux runs in Hyper-V Virtual Trust Level %d\n", ms_hyperv.vtl); x86_platform.realmode_reserve = x86_init_noop; x86_platform.realmode_init = x86_init_noop;