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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.c76
1 files changed, 52 insertions, 24 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 194539aea175..2a3f2a7db243 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -44,8 +44,20 @@ static u64 gru_start_paddr, gru_end_paddr;
static union uvh_apicid uvh_apicid;
int uv_min_hub_revision_id;
EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
+unsigned int uv_apicid_hibits;
+EXPORT_SYMBOL_GPL(uv_apicid_hibits);
static DEFINE_SPINLOCK(uv_nmi_lock);
+static unsigned long __init uv_early_read_mmr(unsigned long addr)
+{
+ unsigned long val, *mmr;
+
+ mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
+ val = *mmr;
+ early_iounmap(mmr, sizeof(*mmr));
+ return val;
+}
+
static inline bool is_GRU_range(u64 start, u64 end)
{
return start >= gru_start_paddr && end <= gru_end_paddr;
@@ -56,28 +68,24 @@ static bool uv_is_untracked_pat_range(u64 start, u64 end)
return is_ISA_range(start, end) || is_GRU_range(start, end);
}
-static int early_get_nodeid(void)
+static int __init early_get_pnodeid(void)
{
union uvh_node_id_u node_id;
- unsigned long *mmr;
-
- mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr));
- node_id.v = *mmr;
- early_iounmap(mmr, sizeof(*mmr));
+ union uvh_rh_gam_config_mmr_u m_n_config;
+ int pnode;
/* Currently, all blades have same revision number */
+ node_id.v = uv_early_read_mmr(UVH_NODE_ID);
+ m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
uv_min_hub_revision_id = node_id.s.revision;
- return node_id.s.node_id;
+ pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
+ return pnode;
}
static void __init early_get_apic_pnode_shift(void)
{
- unsigned long *mmr;
-
- mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_APICID, sizeof(*mmr));
- uvh_apicid.v = *mmr;
- early_iounmap(mmr, sizeof(*mmr));
+ uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
if (!uvh_apicid.v)
/*
* Old bios, use default value
@@ -85,12 +93,25 @@ static void __init early_get_apic_pnode_shift(void)
uvh_apicid.s.pnode_shift = UV_APIC_PNODE_SHIFT;
}
+/*
+ * Add an extra bit as dictated by bios to the destination apicid of
+ * interrupts potentially passing through the UV HUB. This prevents
+ * a deadlock between interrupts and IO port operations.
+ */
+static void __init uv_set_apicid_hibit(void)
+{
+ union uvh_lb_target_physical_apic_id_mask_u apicid_mask;
+
+ apicid_mask.v = uv_early_read_mmr(UVH_LB_TARGET_PHYSICAL_APIC_ID_MASK);
+ uv_apicid_hibits = apicid_mask.s.bit_enables & UV_APICID_HIBIT_MASK;
+}
+
static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- int nodeid;
+ int pnodeid;
if (!strcmp(oem_id, "SGI")) {
- nodeid = early_get_nodeid();
+ 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;
@@ -100,8 +121,9 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
uv_system_type = UV_X2APIC;
else if (!strcmp(oem_table_id, "UVH")) {
__get_cpu_var(x2apic_extra_bits) =
- nodeid << (uvh_apicid.s.pnode_shift - 1);
+ pnodeid << uvh_apicid.s.pnode_shift;
uv_system_type = UV_NON_UNIQUE_APIC;
+ uv_set_apicid_hibit();
return 1;
}
}
@@ -155,6 +177,7 @@ static int __cpuinit uv_wakeup_secondary(int phys_apicid, unsigned long start_ri
int pnode;
pnode = uv_apicid_to_pnode(phys_apicid);
+ phys_apicid |= uv_apicid_hibits;
val = (1UL << UVH_IPI_INT_SEND_SHFT) |
(phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
@@ -236,7 +259,7 @@ static unsigned int uv_cpu_mask_to_apicid(const struct cpumask *cpumask)
int cpu = cpumask_first(cpumask);
if ((unsigned)cpu < nr_cpu_ids)
- return per_cpu(x86_cpu_to_apicid, cpu);
+ return per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
else
return BAD_APICID;
}
@@ -255,7 +278,7 @@ uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
if (cpumask_test_cpu(cpu, cpu_online_mask))
break;
}
- return per_cpu(x86_cpu_to_apicid, cpu);
+ return per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits;
}
static unsigned int x2apic_get_apic_id(unsigned long x)
@@ -661,27 +684,32 @@ void uv_nmi_init(void)
void __init uv_system_init(void)
{
union uvh_rh_gam_config_mmr_u m_n_config;
+ union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
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 bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val, n_io;
int gnode_extra, max_pnode = 0;
unsigned long mmr_base, present, paddr;
- unsigned short pnode_mask;
+ unsigned short pnode_mask, pnode_io_mask;
map_low_mmrs();
m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
m_val = m_n_config.s.m_skt;
n_val = m_n_config.s.n_skt;
+ mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
+ n_io = mmioh.s.n_io;
mmr_base =
uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
~UV_MMR_ENABLE;
pnode_mask = (1 << n_val) - 1;
+ pnode_io_mask = (1 << n_io) - 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_INFO "UV: N %d, M %d, N_IO: %d, gnode_upper 0x%lx, gnode_extra 0x%x, pnode_mask 0x%x, pnode_io_mask 0x%x\n",
+ n_val, m_val, n_io, gnode_upper, gnode_extra, pnode_mask, pnode_io_mask);
printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
@@ -714,7 +742,7 @@ void __init uv_system_init(void)
for (j = 0; j < 64; j++) {
if (!test_bit(j, &present))
continue;
- pnode = (i * 64 + j);
+ pnode = (i * 64 + j) & pnode_mask;
uv_blade_info[blade].pnode = pnode;
uv_blade_info[blade].nr_possible_cpus = 0;
uv_blade_info[blade].nr_online_cpus = 0;
@@ -735,6 +763,7 @@ void __init uv_system_init(void)
/*
* apic_pnode_shift must be set before calling uv_apicid_to_pnode();
*/
+ uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
pnode = uv_apicid_to_pnode(apicid);
blade = boot_pnode_to_blade(pnode);
@@ -751,7 +780,6 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->numa_blade_id = blade;
uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
uv_cpu_hub_info(cpu)->pnode = pnode;
- uv_cpu_hub_info(cpu)->pnode_mask = pnode_mask;
uv_cpu_hub_info(cpu)->gpa_mask = (1UL << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
@@ -775,7 +803,7 @@ void __init uv_system_init(void)
map_gru_high(max_pnode);
map_mmr_high(max_pnode);
- map_mmioh_high(max_pnode);
+ map_mmioh_high(max_pnode & pnode_io_mask);
uv_cpu_init();
uv_scir_register_cpu_notifier();
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.