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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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93d051550e
Raven Ridge systems may have malfunction touchpad or hang at boot if incorrect IVRS IOAPIC is provided by BIOS. Users already found correct "ivrs_ioapic=" values, let's put them inside kernel to workaround buggy BIOS. BugLink: https://bugs.launchpad.net/bugs/1795292 BugLink: https://bugs.launchpad.net/bugs/1837688 Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Quirks for AMD IOMMU
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*
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* Copyright (C) 2019 Kai-Heng Feng <kai.heng.feng@canonical.com>
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*/
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#ifdef CONFIG_DMI
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#include <linux/dmi.h>
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#include "amd_iommu.h"
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#define IVHD_SPECIAL_IOAPIC 1
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struct ivrs_quirk_entry {
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u8 id;
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u16 devid;
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};
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enum {
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DELL_INSPIRON_7375 = 0,
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DELL_LATITUDE_5495,
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LENOVO_IDEAPAD_330S_15ARR,
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};
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static const struct ivrs_quirk_entry ivrs_ioapic_quirks[][3] __initconst = {
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/* ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 */
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[DELL_INSPIRON_7375] = {
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{ .id = 4, .devid = 0xa0 },
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{ .id = 5, .devid = 0x2 },
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{}
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},
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/* ivrs_ioapic[4]=00:14.0 */
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[DELL_LATITUDE_5495] = {
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{ .id = 4, .devid = 0xa0 },
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{}
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},
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/* ivrs_ioapic[32]=00:14.0 */
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[LENOVO_IDEAPAD_330S_15ARR] = {
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{ .id = 32, .devid = 0xa0 },
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{}
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},
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{}
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};
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static int __init ivrs_ioapic_quirk_cb(const struct dmi_system_id *d)
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{
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const struct ivrs_quirk_entry *i;
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for (i = d->driver_data; i->id != 0 && i->devid != 0; i++)
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add_special_device(IVHD_SPECIAL_IOAPIC, i->id, (u16 *)&i->devid, 0);
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return 0;
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}
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static const struct dmi_system_id ivrs_quirks[] __initconst = {
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{
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.callback = ivrs_ioapic_quirk_cb,
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.ident = "Dell Inspiron 7375",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7375"),
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},
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.driver_data = (void *)&ivrs_ioapic_quirks[DELL_INSPIRON_7375],
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},
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{
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.callback = ivrs_ioapic_quirk_cb,
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.ident = "Dell Latitude 5495",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 5495"),
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},
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.driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
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},
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{
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.callback = ivrs_ioapic_quirk_cb,
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.ident = "Lenovo ideapad 330S-15ARR",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "81FB"),
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},
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.driver_data = (void *)&ivrs_ioapic_quirks[LENOVO_IDEAPAD_330S_15ARR],
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},
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{}
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};
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void __init amd_iommu_apply_ivrs_quirks(void)
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{
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dmi_check_system(ivrs_quirks);
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}
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#endif
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