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| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-08-21 13:10:04 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-05 13:09:59 +0200 |
| commit | 2aeeb0a4b44059ad652a470efd8cdad49f72a0c9 (patch) | |
| tree | cbd5ff90f189e591244219e36391280feeac59f0 /drivers/iommu/amd_iommu.h | |
| parent | 291da335040c61cd85e164f207723a2915e72149 (diff) | |
| download | linux-stable-2aeeb0a4b44059ad652a470efd8cdad49f72a0c9.tar.gz linux-stable-2aeeb0a4b44059ad652a470efd8cdad49f72a0c9.tar.bz2 linux-stable-2aeeb0a4b44059ad652a470efd8cdad49f72a0c9.zip | |
iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems
[ Upstream commit 93d051550ee02eaff9a2541d825605a7bd778027 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 |