From patchwork Tue Aug 6 22:12:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunhong Jiang X-Patchwork-Id: 817140 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2954D176AB8; Tue, 6 Aug 2024 22:13:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722982387; cv=none; b=eblmEoDUoVlvQu4f8/J7gkpgyZLERlcNoDJDetyAh1Y+g3AYk8rWRaWRGL1CP5Xaem7DXiPhUhemN6kBEU8t27lH3jYd5lI0lVsWey6vHd6LAOu2D4Ks3wKK/eMjKRSCeSeWYuha2DmzfaxayD6x7BVwMh48d3YlvxpPdDlOZGk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722982387; c=relaxed/simple; bh=GvAvetipniNPqDCAsSTJ2tKWGXpPgxdxr/ozQTWDvlk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Yol5ohQFfMPIEX4o6T5WIrLMBzbDwnUzBin7scxQHaScEzP2DaJdKvQAzZK4EB0FOL6Q9G4h9DpFEakOMv+hrZnnwRhX2wgFwtpCoMDCrLmoDDZ3f5B2hLaxy8BmF3OPnSWI8T/tpquo6FV4CJZUVWrceIWrWNA6AxEBadgbNkY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=lNUbJG89; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="lNUbJG89" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1722982386; x=1754518386; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GvAvetipniNPqDCAsSTJ2tKWGXpPgxdxr/ozQTWDvlk=; b=lNUbJG89xzqttfZ5O/PjOEYayu53aa2k3tmBxa7e/sekh4B/c1R1RKO0 mCFf3iKITNNht6b7r2u4BEOC6t4PE6glH81wWvPm63PI92yNU4FrcVpMW ZopxEuo14rnGcH2Usf2+JmHESI4PzCUeUHZta1v2WVDG4j3bVbX7onsOP ZnpftkDyWa67Ayrtm+ZUykytbNsXRh70gZrseSTke1fnnLmMzuRa4phkH LLq9JK6gRS34km0Mz15g4shiM632bd6Vy05lJI953GRYUDh9kMbM54W8K 7LUiS5v3h2QkGEwSpLwb1pt+qy1T3Eh37AwSzZ1bBQOCUlYHPNf9xE6et g==; X-CSE-ConnectionGUID: Qne+LIBSQFi7o0xsl3Sl5w== X-CSE-MsgGUID: Lq9DLeo9QXax/YCyn3la0Q== X-IronPort-AV: E=McAfee;i="6700,10204,11156"; a="38534405" X-IronPort-AV: E=Sophos;i="6.09,268,1716274800"; d="scan'208";a="38534405" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2024 15:13:06 -0700 X-CSE-ConnectionGUID: R6lNlHPWSLuWhnu03N0OBA== X-CSE-MsgGUID: tu2pjLBeRdqKJzGInNHZmg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,268,1716274800"; d="scan'208";a="61465646" Received: from yjiang5-dev1.sc.intel.com ([172.25.103.134]) by orviesa003.jf.intel.com with ESMTP; 06 Aug 2024 15:13:05 -0700 From: Yunhong Jiang To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, rafael@kernel.org, lenb@kernel.org, kirill.shutemov@linux.intel.com Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-acpi@vger.kernel.org, yunhong.jiang@linux.intel.com Subject: [PATCH 5/7] x86/hyperv: Mark ACPI wakeup mailbox page as private Date: Tue, 6 Aug 2024 15:12:35 -0700 Message-Id: <20240806221237.1634126-6-yunhong.jiang@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240806221237.1634126-1-yunhong.jiang@linux.intel.com> References: <20240806221237.1634126-1-yunhong.jiang@linux.intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The ACPI wakeup mailbox is accessed by the OS and the firmware, both are in the guest's context, instead of the hypervisor/VMM context. Mark the address private explicitly. Signed-off-by: Yunhong Jiang --- arch/x86/hyperv/hv_vtl.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c index 04775346369c..bfe54afcdf1d 100644 --- a/arch/x86/hyperv/hv_vtl.c +++ b/arch/x86/hyperv/hv_vtl.c @@ -22,12 +22,28 @@ static bool __init hv_vtl_msi_ext_dest_id(void) return true; } +/* + * The ACPI wakeup mailbox are accessed by the OS and the BIOS, both are in the + * guest's context, instead of the hypervisor/VMM context. + */ +static bool hv_is_private_mmio_tdx(u64 addr) +{ + if (wakeup_mailbox_addr && (addr >= wakeup_mailbox_addr && + addr < (wakeup_mailbox_addr + PAGE_SIZE))) + return true; + return false; +} + void __init hv_vtl_init_platform(void) { pr_info("Linux runs in Hyper-V Virtual Trust Level\n"); - x86_platform.realmode_reserve = x86_init_noop; - x86_platform.realmode_init = x86_init_noop; + if (wakeup_mailbox_addr) { + x86_platform.hyper.is_private_mmio = hv_is_private_mmio_tdx; + } else { + x86_platform.realmode_reserve = x86_init_noop; + x86_platform.realmode_init = x86_init_noop; + } x86_init.irqs.pre_vector_init = x86_init_noop; x86_init.timers.timer_init = x86_init_noop;