From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934666AbcAZPim (ORCPT ); Tue, 26 Jan 2016 10:38:42 -0500 Received: from mail-bn1bon0063.outbound.protection.outlook.com ([157.56.111.63]:39584 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966545AbcAZPg7 (ORCPT ); Tue, 26 Jan 2016 10:36:59 -0500 Authentication-Results: spf=none (sender IP is 165.204.84.221) smtp.mailfrom=amd.com; 8bytes.org; dkim=none (message not signed) header.d=none;8bytes.org; dmarc=permerror action=none header.from=amd.com; X-WSS-ID: 0O1KGPG-07-8TA-02 X-M-MSG: From: Wan Zongshun To: Joerg Roedel , CC: Suravee Suthikulpanit , Borislav Petkov , Ray Huang , , , , , "Wan Zongshun" Subject: [PATCH V2 4/8] iommu/amd: Introduces ivrs_acpihid kernel parameter Date: Tue, 26 Jan 2016 18:14:33 -0500 Message-ID: <1453850077-2539-5-git-send-email-vincent.wan@amd.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1453850077-2539-1-git-send-email-vincent.wan@amd.com> References: <1453850077-2539-1-git-send-email-vincent.wan@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.221;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10009020)(6009001)(2980300002)(428002)(189002)(199003)(4326007)(19580405001)(53416004)(2906002)(87936001)(50466002)(5001770100001)(33646002)(86362001)(50226001)(5003940100001)(36756003)(92566002)(97736004)(1220700001)(1096002)(77096005)(11100500001)(229853001)(48376002)(2950100001)(106466001)(5008740100001)(189998001)(19580395003)(5003600100002)(50986999)(105586002)(586003)(101416001)(76176999)(47776003);DIR:OUT;SFP:1101;SCL:1;SRVR:BN4PR12MB0851;H:atltwp01.amd.com;FPR:;SPF:None;PTR:InfoDomainNonexistent;MX:1;A:1;LANG:en; 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This is used to override existing ACPI-HID IVHD device entry, or add an entry in case it is missing in the IVHD. Signed-off-by: Wan Zongshun Signed-off-by: Suravee Suthikulpanit --- Documentation/kernel-parameters.txt | 7 +++++++ drivers/iommu/amd_iommu_init.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 742f69d..5c364c6 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1680,6 +1680,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. PCI device 00:14.0 write the parameter as: ivrs_hpet[0]=00:14.0 + ivrs_acpihid [HW,X86_64] + Provide an override to the ACPI-HID:UID<->DEVICE-ID + mapping provided in the IVRS ACPI table. For + example, to map UART-HID:UID AMD0020:0 to + PCI device 00:14.5 write the parameter as: + ivrs_acpihid[00:14.5]=AMD0020:0 + js= [HW,JOY] Analog joystick See Documentation/input/joystick.txt. diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 0a8e033..ad05614 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2430,10 +2430,43 @@ static int __init parse_ivrs_hpet(char *str) return 1; } +static int __init parse_ivrs_acpihid(char *str) +{ + u32 bus, dev, fn; + char *hid, *uid, *p; + char acpiid[ACPIHID_UID_LEN + ACPIHID_HID_LEN] = {0}; + int ret, i; + + ret = sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid); + if (ret != 4) { + pr_err("AMD-Vi: Invalid command line: ivrs_acpihid(%s)\n", str); + return 1; + } + + p = acpiid; + hid = strsep(&p, ":"); + uid = p; + + if (!hid || !(*hid) || !uid) { + pr_err("AMD-Vi: Invalid command line: hid or uid\n"); + return 1; + } + + i = early_acpihid_map_size++; + memcpy(early_acpihid_map[i].hid, hid, strlen(hid)); + memcpy(early_acpihid_map[i].uid, uid, strlen(uid)); + early_acpihid_map[i].devid = + ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7); + early_acpihid_map[i].cmd_line = true; + + return 1; +} + __setup("amd_iommu_dump", parse_amd_iommu_dump); __setup("amd_iommu=", parse_amd_iommu_options); __setup("ivrs_ioapic", parse_ivrs_ioapic); __setup("ivrs_hpet", parse_ivrs_hpet); +__setup("ivrs_acpihid", parse_ivrs_acpihid); IOMMU_INIT_FINISH(amd_iommu_detect, gart_iommu_hole_init, -- 1.9.1