linux/drivers/iommu/amd_iommu_quirks.c
Kai-Heng Feng 93d051550e iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems
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>
2019-08-23 10:26:48 +02:00

93 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Quirks for AMD IOMMU
*
* Copyright (C) 2019 Kai-Heng Feng <kai.heng.feng@canonical.com>
*/
#ifdef CONFIG_DMI
#include <linux/dmi.h>
#include "amd_iommu.h"
#define IVHD_SPECIAL_IOAPIC 1
struct ivrs_quirk_entry {
u8 id;
u16 devid;
};
enum {
DELL_INSPIRON_7375 = 0,
DELL_LATITUDE_5495,
LENOVO_IDEAPAD_330S_15ARR,
};
static const struct ivrs_quirk_entry ivrs_ioapic_quirks[][3] __initconst = {
/* ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 */
[DELL_INSPIRON_7375] = {
{ .id = 4, .devid = 0xa0 },
{ .id = 5, .devid = 0x2 },
{}
},
/* ivrs_ioapic[4]=00:14.0 */
[DELL_LATITUDE_5495] = {
{ .id = 4, .devid = 0xa0 },
{}
},
/* ivrs_ioapic[32]=00:14.0 */
[LENOVO_IDEAPAD_330S_15ARR] = {
{ .id = 32, .devid = 0xa0 },
{}
},
{}
};
static int __init ivrs_ioapic_quirk_cb(const struct dmi_system_id *d)
{
const struct ivrs_quirk_entry *i;
for (i = d->driver_data; i->id != 0 && i->devid != 0; i++)
add_special_device(IVHD_SPECIAL_IOAPIC, i->id, (u16 *)&i->devid, 0);
return 0;
}
static const struct dmi_system_id ivrs_quirks[] __initconst = {
{
.callback = ivrs_ioapic_quirk_cb,
.ident = "Dell Inspiron 7375",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7375"),
},
.driver_data = (void *)&ivrs_ioapic_quirks[DELL_INSPIRON_7375],
},
{
.callback = ivrs_ioapic_quirk_cb,
.ident = "Dell Latitude 5495",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 5495"),
},
.driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
},
{
.callback = ivrs_ioapic_quirk_cb,
.ident = "Lenovo ideapad 330S-15ARR",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "81FB"),
},
.driver_data = (void *)&ivrs_ioapic_quirks[LENOVO_IDEAPAD_330S_15ARR],
},
{}
};
void __init amd_iommu_apply_ivrs_quirks(void)
{
dmi_check_system(ivrs_quirks);
}
#endif