From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-6.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id BBB267D04D for ; Tue, 9 Apr 2019 12:57:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727136AbfDIM5Z (ORCPT ); Tue, 9 Apr 2019 08:57:25 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:33406 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726129AbfDIM5Z (ORCPT ); Tue, 9 Apr 2019 08:57:25 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 5DE5FB99BA9AAAB34D1B; Tue, 9 Apr 2019 20:54:15 +0800 (CST) Received: from HGHY1l002753561.china.huawei.com (10.177.23.164) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.408.0; Tue, 9 Apr 2019 20:54:07 +0800 From: Zhen Lei To: Jean-Philippe Brucker , John Garry , Robin Murphy , Will Deacon , Joerg Roedel , Jonathan Corbet , linux-doc , Sebastian Ott , Gerald Schaefer , "Martin Schwidefsky" , Heiko Carstens , Benjamin Herrenschmidt , Paul Mackerras , "Michael Ellerman" , Tony Luck , Fenghua Yu , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , David Woodhouse , iommu , linux-kernel , linux-s390 , linuxppc-dev , x86 , linux-ia64 CC: Zhen Lei , Hanjun Guo Subject: [PATCH v5 5/6] powernv/iommu: add support for generic boot option iommu.dma_mode Date: Tue, 9 Apr 2019 20:53:07 +0800 Message-ID: <20190409125308.18304-6-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.19.2.windows.1 In-Reply-To: <20190409125308.18304-1-thunder.leizhen@huawei.com> References: <20190409125308.18304-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.177.23.164] X-CFilter-Loop: Reflected Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org iommu=nobypass can be replaced with iommu.dma_mode=strict. Signed-off-by: Zhen Lei --- Documentation/admin-guide/kernel-parameters.txt | 2 +- arch/powerpc/platforms/powernv/pci-ioda.c | 5 ++--- drivers/iommu/Kconfig | 1 + 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index ab8e3c4798c0a2a..176f96032d9d62a 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1815,7 +1815,7 @@ options(such as CONFIG_IOMMU_DEFAULT_PASSTHROUGH) to choose which mode to be used. Note: For historical reasons, ARM64/S390/PPC/X86 have - their specific options. Currently, only ARM64/S390 + their specific options. Currently, only ARM64/S390/PPC support this boot option, and hope other ARCHs to use this as generic boot option. passthrough diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 3ead4c237ed0ec9..8862885d866418f 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -85,7 +85,6 @@ void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, va_end(args); } -static bool pnv_iommu_bypass_disabled __read_mostly; static bool pci_reset_phbs __read_mostly; static int __init iommu_setup(char *str) @@ -95,7 +94,7 @@ static int __init iommu_setup(char *str) while (*str) { if (!strncmp(str, "nobypass", 8)) { - pnv_iommu_bypass_disabled = true; + iommu_default_dma_mode_set(IOMMU_DMA_MODE_STRICT); pr_info("PowerNV: IOMMU bypass window disabled.\n"); break; } @@ -2456,7 +2455,7 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) return rc; } - if (!pnv_iommu_bypass_disabled) + if (IOMMU_DMA_MODE_IS_PASSTHROUGH()) pnv_pci_ioda2_set_bypass(pe, true); return 0; diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index b7173b106cd816a..5dca666b22e6cd5 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -77,6 +77,7 @@ config IOMMU_DEBUGFS choice prompt "IOMMU dma mode" depends on IOMMU_API + default IOMMU_DEFAULT_PASSTHROUGH if (PPC_POWERNV && PCI) default IOMMU_DEFAULT_LAZY if S390_IOMMU default IOMMU_DEFAULT_STRICT help -- 1.8.3