Messages in this thread - First message in thread
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- "Keshavamurthy, Anil S"
- Andrew Morton
| | | Subject | Re: [Intel IOMMU 01/10] DMAR detection and parsing logic | From | Peter Zijlstra <> | Date | Wed, 04 Jul 2007 11:18:56 +0200 |
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On Tue, 2007-06-19 at 14:37 -0700, Keshavamurthy, Anil S wrote: > plain text document attachment (dmar_detection.patch)
> +/** > + * parse_dmar_table - parses the DMA reporting table > + */ > +static int __init > +parse_dmar_table(void) > +{ > + struct acpi_table_dmar *dmar; > + struct acpi_dmar_header *entry_header; > + int ret = 0; > + > + dmar = (struct acpi_table_dmar *)dmar_tbl; > + > + if (!dmar->width) { ^^^^^^^^^^^^^^^^^^^
That goes *splat* on my opteron box.
> + printk (KERN_WARNING PREFIX "Zero: Invalid DMAR haw\n"); > + return -EINVAL; > + } > + > + printk (KERN_INFO PREFIX "Host address width %d\n", > + dmar->width + 1); > + > + entry_header = (struct acpi_dmar_header *)(dmar + 1); > + while (((unsigned long)entry_header) < > + (((unsigned long)dmar) + dmar_tbl->length)) { > + dmar_table_print_dmar_entry(entry_header); > + > + switch (entry_header->type) { > + case ACPI_DMAR_TYPE_HARDWARE_UNIT: > + ret = dmar_parse_one_drhd(entry_header); > + break; > + case ACPI_DMAR_TYPE_RESERVED_MEMORY: > + ret = dmar_parse_one_rmrr(entry_header); > + break; > + default: > + printk(KERN_WARNING PREFIX > + "Unknown DMAR structure type\n"); > + ret = 0; /* for forward compatibility */ > + break; > + } > + if (ret) > + break; > + > + entry_header = ((void *)entry_header + entry_header->length); > + } > + return ret; > +} > +
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