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| author | Vasant Hegde <vasant.hegde@amd.com> | 2022-08-25 06:39:39 +0000 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-09-07 16:12:37 +0200 |
| commit | d799a183da39ac4988b62da8978950efa177ba9f (patch) | |
| tree | fed5bc52f405806d2e7f044d33270495db665140 /drivers/iommu/amd | |
| parent | 4db6c41f09469ab8ca5d30f5d4731f299d25ff1c (diff) | |
| download | linux-d799a183da39ac4988b62da8978950efa177ba9f.tar.gz linux-d799a183da39ac4988b62da8978950efa177ba9f.tar.bz2 linux-d799a183da39ac4988b62da8978950efa177ba9f.zip | |
iommu/amd: Add command-line option to enable different page table
Enhance amd_iommu command line option to specify v1 or v2 page table.
By default system will boot in V1 page table mode.
Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220825063939.8360-10-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/init.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 779d4f9b17f8..688cf8387b0b 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -3379,17 +3379,30 @@ static int __init parse_amd_iommu_intr(char *str) static int __init parse_amd_iommu_options(char *str) { - for (; *str; ++str) { + if (!str) + return -EINVAL; + + while (*str) { if (strncmp(str, "fullflush", 9) == 0) { pr_warn("amd_iommu=fullflush deprecated; use iommu.strict=1 instead\n"); iommu_set_dma_strict(); - } - if (strncmp(str, "force_enable", 12) == 0) + } else if (strncmp(str, "force_enable", 12) == 0) { amd_iommu_force_enable = true; - if (strncmp(str, "off", 3) == 0) + } else if (strncmp(str, "off", 3) == 0) { amd_iommu_disabled = true; - if (strncmp(str, "force_isolation", 15) == 0) + } else if (strncmp(str, "force_isolation", 15) == 0) { amd_iommu_force_isolation = true; + } else if (strncmp(str, "pgtbl_v1", 8) == 0) { + amd_iommu_pgtable = AMD_IOMMU_V1; + } else if (strncmp(str, "pgtbl_v2", 8) == 0) { + amd_iommu_pgtable = AMD_IOMMU_V2; + } else { + pr_notice("Unknown option - '%s'\n", str); + } + + str += strcspn(str, ","); + while (*str == ',') + str++; } return 1; |