diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-08-21 07:10:04 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-08-23 10:26:48 +0200 |
| commit | 93d051550ee02eaff9a2541d825605a7bd778027 (patch) | |
| tree | 720decc779cf2a641a26514ecb983a0be4549446 /drivers/iommu/amd_iommu.h | |
| parent | iommu/amd: Re-factor guest virtual APIC (de-)activation code (diff) | |
| download | linux-93d051550ee02eaff9a2541d825605a7bd778027.tar.xz linux-93d051550ee02eaff9a2541d825605a7bd778027.zip | |
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>
Diffstat (limited to 'drivers/iommu/amd_iommu.h')
| -rw-r--r-- | drivers/iommu/amd_iommu.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.h b/drivers/iommu/amd_iommu.h new file mode 100644 index 000000000000..12d540d9b59b --- /dev/null +++ b/drivers/iommu/amd_iommu.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef AMD_IOMMU_H +#define AMD_IOMMU_H + +int __init add_special_device(u8 type, u8 id, u16 *devid, bool cmd_line); + +#ifdef CONFIG_DMI +void amd_iommu_apply_ivrs_quirks(void); +#else +static void amd_iommu_apply_ivrs_quirks(void) { } +#endif + +#endif |