Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752941AbZJXB0s (ORCPT ); Fri, 23 Oct 2009 21:26:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752759AbZJXB0r (ORCPT ); Fri, 23 Oct 2009 21:26:47 -0400 Received: from sous-sol.org ([216.99.217.87]:37214 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751705AbZJXB0r (ORCPT ); Fri, 23 Oct 2009 21:26:47 -0400 Date: Fri, 23 Oct 2009 18:26:06 -0700 From: Chris Wright To: Weidong Han Cc: Suresh Siddha , iommu@lists.linux-foundation.org, David Woodhouse , linux-kernel@vger.kernel.org Subject: [PATCH] intr-remap: allow disabling source id checking Message-ID: <20091024012606.GB14926@sequoia.sous-sol.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2626 Lines: 84 Allow users to disable source id checking. This is really a debugging aid for broken BIOS setups. Signed-off-by: Chris Wright --- Documentation/kernel-parameters.txt | 7 +++++++ drivers/pci/intr_remapping.c | 20 ++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 6fa7292..344256c 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -982,6 +982,12 @@ and is between 256 and 4096 characters. It is defined in the file result in a hardware IOTLB flush operation as opposed to batching them for performance. + intremap= [X86-64, Intel-IOMMU] + Format: { on (default) | off | nosid } + on enable Interrupt Remapping (default) + off disable Interrupt Remapping + nosid disable Source ID checking + inttest= [IA64] iomem= Disable strict checking of access to MMIO memory @@ -1691,6 +1697,7 @@ and is between 256 and 4096 characters. It is defined in the file nointremap [X86-64, Intel-IOMMU] Do not enable interrupt remapping. + [Deprecated - use intremap=off] nointroute [IA-64] diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index 0ed78a7..136bb6e 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -18,6 +18,8 @@ static int ir_ioapic_num; int intr_remapping_enabled; static int disable_intremap; +static int disable_sourceid_checking; + static __init int setup_nointremap(char *str) { disable_intremap = 1; @@ -25,6 +27,22 @@ static __init int setup_nointremap(char *str) } early_param("nointremap", setup_nointremap); +static __init int setup_intremap(char *str) +{ + if (!str) + return -EINVAL; + + if (!strncmp(str, "on", 2)) + disable_intremap = 0; + else if (!strncmp(str, "off", 3)) + disable_intremap = 1; + else if (!strncmp(str, "nosid", 5)) + disable_sourceid_checking = 1; + + return 0; +} +early_param("intremap", setup_intremap); + struct irq_2_iommu { struct intel_iommu *iommu; u16 irte_index; @@ -440,6 +458,8 @@ int free_irte(int irq) static void set_irte_sid(struct irte *irte, unsigned int svt, unsigned int sq, unsigned int sid) { + if (disable_sourceid_checking) + svt = SVT_NO_VERIFY; irte->svt = svt; irte->sq = sq; irte->sid = sid; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/