Commit c4ed3f04 authored by Jack Steiner's avatar Jack Steiner Committed by Ingo Molnar

x86, UV: Fix macros for multiple coherency domains

Fix bug in the SGI UV macros that support systems with multiple
coherency domains.  The macros used for referencing global MMR
(chipset registers) are failing to correctly "or" the NASID
(node identifier) bits that reside above M+N. These high bits
are supplied automatically by the chipset for memory accesses
coming from the processor socket.

However, the bits must be present for references to the special
global MMR space used to map chipset registers. (See uv_hub.h
for more details ...)

The bug results in references to invalid/incorrect nodes.
Signed-off-by: default avatarJack Steiner <steiner@sgi.com>
Cc: <stable@kernel.org>
LKML-Reference: <20090608154405.GA16395@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 3aa6b186
......@@ -133,6 +133,7 @@ struct uv_scir_s {
struct uv_hub_info_s {
unsigned long global_mmr_base;
unsigned long gpa_mask;
unsigned int gnode_extra;
unsigned long gnode_upper;
unsigned long lowmem_remap_top;
unsigned long lowmem_remap_base;
......@@ -159,7 +160,8 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
* p - PNODE (local part of nsids, right shifted 1)
*/
#define UV_NASID_TO_PNODE(n) (((n) >> 1) & uv_hub_info->pnode_mask)
#define UV_PNODE_TO_NASID(p) (((p) << 1) | uv_hub_info->gnode_upper)
#define UV_PNODE_TO_GNODE(p) ((p) |uv_hub_info->gnode_extra)
#define UV_PNODE_TO_NASID(p) (UV_PNODE_TO_GNODE(p) << 1)
#define UV_LOCAL_MMR_BASE 0xf4000000UL
#define UV_GLOBAL_MMR32_BASE 0xf8000000UL
......@@ -173,7 +175,7 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
#define UV_GLOBAL_MMR32_PNODE_BITS(p) ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))
#define UV_GLOBAL_MMR64_PNODE_BITS(p) \
((unsigned long)(p) << UV_GLOBAL_MMR64_PNODE_SHIFT)
((unsigned long)(UV_PNODE_TO_GNODE(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)
#define UV_APIC_PNODE_SHIFT 6
......
......@@ -562,7 +562,7 @@ void __init uv_system_init(void)
union uvh_node_id_u node_id;
unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
int max_pnode = 0;
int gnode_extra, max_pnode = 0;
unsigned long mmr_base, present, paddr;
unsigned short pnode_mask;
......@@ -574,6 +574,13 @@ void __init uv_system_init(void)
mmr_base =
uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
~UV_MMR_ENABLE;
pnode_mask = (1 << n_val) - 1;
node_id.v = uv_read_local_mmr(UVH_NODE_ID);
gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
gnode_upper = ((unsigned long)gnode_extra << m_val);
printk(KERN_DEBUG "UV: N %d, M %d, gnode_upper 0x%lx, gnode_extra 0x%x\n",
n_val, m_val, gnode_upper, gnode_extra);
printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
......@@ -607,11 +614,6 @@ void __init uv_system_init(void)
}
}
pnode_mask = (1 << n_val) - 1;
node_id.v = uv_read_local_mmr(UVH_NODE_ID);
gnode_upper = (((unsigned long)node_id.s.node_id) &
~((1 << n_val) - 1)) << m_val;
uv_bios_init();
uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
&sn_coherency_id, &sn_region_size);
......@@ -634,6 +636,7 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
......
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