diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-07-26 16:43:48 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-07-29 11:31:06 +0300 |
| commit | 432e5dfc7eb75681b412c2b0cafb8604475e0aba (patch) | |
| tree | 33d5b75312a3017803671a5a74afa352326c4d56 /include/drm/drm_cache.h | |
| parent | c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b (diff) | |
| download | linux-432e5dfc7eb75681b412c2b0cafb8604475e0aba.tar.xz | |
iommu/amd: Add support for AVIC when SNP is enabled
In order to support AVIC on SNP-enabled system, The IOMMU driver needs to
check EFR2[SNPAVICSup] and enables the support by setting SNPAVICEn bit
in the IOMMU control register (MMIO offset 18h).
For detail, please see section "SEV-SNP Guest Virtual APIC Support" of the
AMD I/O Virtualization Technology (IOMMU) Specification.
(https://www.amd.com/system/files/TechDocs/48882_IOMMU.pdf)
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20220726134348.6438-3-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/drm/drm_cache.h')
0 files changed, 0 insertions, 0 deletions