diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2008-10-17 12:14:13 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2008-10-17 12:14:13 -0700 |
| commit | 62fdd7678a26efadd6ac5c2869543caff77d2df0 (patch) | |
| tree | 0dd67208590c4540ff6a4476579a55bcac0d1fce /arch/ia64/kernel/acpi.c | |
| parent | 6bb7a935489dab20802dde6c2cb7d8582f4849bf (diff) | |
| download | linux-62fdd7678a26efadd6ac5c2869543caff77d2df0.tar.bz2 | |
[IA64] Add Variable Page Size and IA64 Support in Intel IOMMU
The patch contains Intel IOMMU IA64 specific code. It defines new
machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush
function, etc.
For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected,
dig_vtd is used for machinve vector. Otherwise, kernel falls back to
dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off"
can be used to force kernel to boot dig machine vector.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/acpi.c')
| -rw-r--r-- | arch/ia64/kernel/acpi.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index 5d1eb7ee2bf6..8cc2f8a610c4 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -91,6 +91,9 @@ acpi_get_sysname(void) struct acpi_table_rsdp *rsdp; struct acpi_table_xsdt *xsdt; struct acpi_table_header *hdr; +#ifdef CONFIG_DMAR + u64 i, nentries; +#endif rsdp_phys = acpi_find_rsdp(); if (!rsdp_phys) { @@ -123,6 +126,18 @@ acpi_get_sysname(void) return "sn2"; } +#ifdef CONFIG_DMAR + /* Look for Intel IOMMU */ + nentries = (hdr->length - sizeof(*hdr)) / + sizeof(xsdt->table_offset_entry[0]); + for (i = 0; i < nentries; i++) { + hdr = __va(xsdt->table_offset_entry[i]); + if (strncmp(hdr->signature, ACPI_SIG_DMAR, + sizeof(ACPI_SIG_DMAR) - 1) == 0) + return "dig_vtd"; + } +#endif + return "dig"; #else # if defined (CONFIG_IA64_HP_SIM) @@ -137,6 +152,8 @@ acpi_get_sysname(void) return "uv"; # elif defined (CONFIG_IA64_DIG) return "dig"; +# elif defined(CONFIG_IA64_DIG_VTD) + return "dig_vtd"; # else # error Unknown platform. Fix acpi.c. # endif |