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Diffstat (limited to 'arch/x86/kernel/apic/x2apic_uv_x.c')
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c89
1 files changed, 60 insertions, 29 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 8e9dcfd630e4..c8d92950bc04 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -144,33 +144,60 @@ static void __init uv_set_apicid_hibit(void)
static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- int pnodeid, is_uv1, is_uv2, is_uv3;
-
- is_uv1 = !strcmp(oem_id, "SGI");
- is_uv2 = !strcmp(oem_id, "SGI2");
- is_uv3 = !strncmp(oem_id, "SGI3", 4); /* there are varieties of UV3 */
- if (is_uv1 || is_uv2 || is_uv3) {
- uv_hub_info->hub_revision =
- (is_uv1 ? UV1_HUB_REVISION_BASE :
- (is_uv2 ? UV2_HUB_REVISION_BASE :
- UV3_HUB_REVISION_BASE));
- pnodeid = early_get_pnodeid();
- early_get_apic_pnode_shift();
- x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
- x86_platform.nmi_init = uv_nmi_init;
- if (!strcmp(oem_table_id, "UVL"))
- uv_system_type = UV_LEGACY_APIC;
- else if (!strcmp(oem_table_id, "UVX"))
- uv_system_type = UV_X2APIC;
- else if (!strcmp(oem_table_id, "UVH")) {
- __this_cpu_write(x2apic_extra_bits,
- pnodeid << uvh_apicid.s.pnode_shift);
- uv_system_type = UV_NON_UNIQUE_APIC;
- uv_set_apicid_hibit();
- return 1;
- }
+ int pnodeid;
+ int uv_apic;
+
+ if (strncmp(oem_id, "SGI", 3) != 0)
+ return 0;
+
+ /*
+ * Determine UV arch type.
+ * SGI: UV100/1000
+ * SGI2: UV2000/3000
+ * SGI3: UV300 (truncated to 4 chars because of different varieties)
+ */
+ uv_hub_info->hub_revision =
+ !strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
+ !strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE :
+ !strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0;
+
+ if (uv_hub_info->hub_revision == 0)
+ goto badbios;
+
+ pnodeid = early_get_pnodeid();
+ early_get_apic_pnode_shift();
+ x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
+ x86_platform.nmi_init = uv_nmi_init;
+
+ if (!strcmp(oem_table_id, "UVX")) { /* most common */
+ uv_system_type = UV_X2APIC;
+ uv_apic = 0;
+
+ } else if (!strcmp(oem_table_id, "UVH")) { /* only UV1 systems */
+ uv_system_type = UV_NON_UNIQUE_APIC;
+ __this_cpu_write(x2apic_extra_bits,
+ pnodeid << uvh_apicid.s.pnode_shift);
+ uv_set_apicid_hibit();
+ uv_apic = 1;
+
+ } else if (!strcmp(oem_table_id, "UVL")) { /* only used for */
+ uv_system_type = UV_LEGACY_APIC; /* very small systems */
+ uv_apic = 0;
+
+ } else {
+ goto badbios;
}
- return 0;
+
+ pr_info("UV: OEM IDs %s/%s, System/HUB Types %d/%d, uv_apic %d\n",
+ oem_id, oem_table_id, uv_system_type,
+ uv_min_hub_revision_id, uv_apic);
+
+ return uv_apic;
+
+badbios:
+ pr_err("UV: OEM_ID:%s OEM_TABLE_ID:%s\n", oem_id, oem_table_id);
+ pr_err("Current BIOS not supported, update kernel and/or BIOS\n");
+ BUG();
}
enum uv_system_type get_uv_system_type(void)
@@ -854,10 +881,14 @@ void __init uv_system_init(void)
unsigned long mmr_base, present, paddr;
unsigned short pnode_mask;
unsigned char n_lshift;
- char *hub = (is_uv1_hub() ? "UV1" :
- (is_uv2_hub() ? "UV2" :
- "UV3"));
+ char *hub = (is_uv1_hub() ? "UV100/1000" :
+ (is_uv2_hub() ? "UV2000/3000" :
+ (is_uv3_hub() ? "UV300" : NULL)));
+ if (!hub) {
+ pr_err("UV: Unknown/unsupported UV hub\n");
+ return;
+ }
pr_info("UV: Found %s hub\n", hub);
map_low_mmrs();