linux-kernel - [PATCH] intel-iommu: Decode (and ignore) RHSA entries

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Message-ID: <adafxac17gn.fsf@cisco.com>
Date:	Thu, 24 Sep 2009 12:14:00 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	David Woodhouse <David.Woodhouse@...el.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] intel-iommu: Decode (and ignore) RHSA entries

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@...co.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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