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Subject[PATCH] intel-iommu: Decode (and ignore) RHSA entries
Date
I recently got a system where the DMAR table included a couple of RHSA
(remapping hardware static affinity) entries. Rather than printing a
message about an "Unknown DMAR structure," it would probably be more
useful to dump the RHSA structure (as other DMAR structures are dumped).

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
drivers/pci/dmar.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 14bbaa1..b233163 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -354,6 +354,7 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
struct acpi_dmar_hardware_unit *drhd;
struct acpi_dmar_reserved_memory *rmrr;
struct acpi_dmar_atsr *atsr;
+ struct acpi_dmar_rhsa *rhsa;

switch (header->type) {
case ACPI_DMAR_TYPE_HARDWARE_UNIT:
@@ -375,6 +376,12 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
atsr = container_of(header, struct acpi_dmar_atsr, header);
printk(KERN_INFO PREFIX "ATSR flags: %#x\n", atsr->flags);
break;
+ case ACPI_DMAR_HARDWARE_AFFINITY:
+ rhsa = container_of(header, struct acpi_dmar_rhsa, header);
+ printk(KERN_INFO PREFIX "RHSA base: %#016Lx proximity domain: %#x\n",
+ (unsigned long long)rhsa->base_address,
+ rhsa->proximity_domain);
+ break;
}
}

@@ -459,6 +466,9 @@ parse_dmar_table(void)
ret = dmar_parse_one_atsr(entry_header);
#endif
break;
+ case ACPI_DMAR_HARDWARE_AFFINITY:
+ /* We don't do anything with RHSA (yet?) */
+ break;
default:
printk(KERN_WARNING PREFIX
"Unknown DMAR structure type\n");

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