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Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: uv2: Workaround for UV2 Hub bug (system global address format)
This commit is contained in:
Linus Torvalds 2011-10-28 05:43:56 -07:00
commit d630ba565f
4 changed files with 46 additions and 16 deletions
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1
arch/x86/include/asm/uv/uv_bau.h
View File

@ -55,6 +55,7 @@
#define UV_BAU_TUNABLES_DIR "sgi_uv"
#define UV_BAU_TUNABLES_FILE "bau_tunables"
#define WHITESPACE " \t\n"
#define uv_mmask ((1UL << uv_hub_info->m_val) - 1)
#define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
#define cpubit_isset(cpu, bau_local_cpumask) \
test_bit((cpu), (bau_local_cpumask).bits)

37
arch/x86/include/asm/uv/uv_hub.h
View File

@ -46,6 +46,13 @@
* PNODE - the low N bits of the GNODE. The PNODE is the most useful variant
* of the nasid for socket usage.
*
* GPA - (global physical address) a socket physical address converted
* so that it can be used by the GRU as a global address. Socket
* physical addresses 1) need additional NASID (node) bits added
* to the high end of the address, and 2) unaliased if the
* partition does not have a physical address 0. In addition, on
* UV2 rev 1, GPAs need the gnode left shifted to bits 39 or 40.
*
*
* NumaLink Global Physical Address Format:
* +--------------------------------+---------------------+
@ -141,6 +148,8 @@ struct uv_hub_info_s {
unsigned int gnode_extra;
unsigned char hub_revision;
unsigned char apic_pnode_shift;
unsigned char m_shift;
unsigned char n_lshift;
unsigned long gnode_upper;
unsigned long lowmem_remap_top;
unsigned long lowmem_remap_base;
@ -177,6 +186,16 @@ static inline int is_uv2_hub(void)
return uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE;
}
static inline int is_uv2_1_hub(void)
{
return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE;
}
static inline int is_uv2_2_hub(void)
{
return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE + 1;
}
union uvh_apicid {
unsigned long v;
struct uvh_apicid_s {
@ -276,7 +295,10 @@ static inline unsigned long uv_soc_phys_ram_to_gpa(unsigned long paddr)
{
if (paddr < uv_hub_info->lowmem_remap_top)
paddr |= uv_hub_info->lowmem_remap_base;
return paddr | uv_hub_info->gnode_upper;
paddr |= uv_hub_info->gnode_upper;
paddr = ((paddr << uv_hub_info->m_shift) >> uv_hub_info->m_shift) |
((paddr >> uv_hub_info->m_val) << uv_hub_info->n_lshift);
return paddr;
}
@ -300,16 +322,19 @@ static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa)
unsigned long remap_base = uv_hub_info->lowmem_remap_base;
unsigned long remap_top = uv_hub_info->lowmem_remap_top;
gpa = ((gpa << uv_hub_info->m_shift) >> uv_hub_info->m_shift) |
((gpa >> uv_hub_info->n_lshift) << uv_hub_info->m_val);
gpa = gpa & uv_hub_info->gpa_mask;
if (paddr >= remap_base && paddr < remap_base + remap_top)
paddr -= remap_base;
return paddr;
}
/* gnode -> pnode */
/* gpa -> pnode */
static inline unsigned long uv_gpa_to_gnode(unsigned long gpa)
{
return gpa >> uv_hub_info->m_val;
return gpa >> uv_hub_info->n_lshift;
}
/* gpa -> pnode */
@ -320,6 +345,12 @@ static inline int uv_gpa_to_pnode(unsigned long gpa)
return uv_gpa_to_gnode(gpa) & n_mask;
}
/* gpa -> node offset*/
static inline unsigned long uv_gpa_to_offset(unsigned long gpa)
{
return (gpa << uv_hub_info->m_shift) >> uv_hub_info->m_shift;
}
/* pnode, offset --> socket virtual */
static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
{

7
arch/x86/kernel/apic/x2apic_uv_x.c
View File

@ -820,6 +820,10 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->apic_pnode_shift = uvh_apicid.s.pnode_shift;
uv_cpu_hub_info(cpu)->hub_revision = uv_hub_info->hub_revision;
uv_cpu_hub_info(cpu)->m_shift = 64 - m_val;
uv_cpu_hub_info(cpu)->n_lshift = is_uv2_1_hub() ?
(m_val == 40 ? 40 : 39) : m_val;
pnode = uv_apicid_to_pnode(apicid);
blade = boot_pnode_to_blade(pnode);
lcpu = uv_blade_info[blade].nr_possible_cpus;
@ -850,8 +854,7 @@ void __init uv_system_init(void)
if (uv_node_to_blade[nid] >= 0)
continue;
paddr = node_start_pfn(nid) << PAGE_SHIFT;
paddr = uv_soc_phys_ram_to_gpa(paddr);
pnode = (paddr >> m_val) & pnode_mask;
pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
blade = boot_pnode_to_blade(pnode);
uv_node_to_blade[nid] = blade;
}

17
arch/x86/platform/uv/tlb_uv.c
View File

@ -115,9 +115,6 @@ early_param("nobau", setup_nobau);
/* base pnode in this partition */
static int uv_base_pnode __read_mostly;
/* position of pnode (which is nasid>>1): */
static int uv_nshift __read_mostly;
static unsigned long uv_mmask __read_mostly;
static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
static DEFINE_PER_CPU(struct bau_control, bau_control);
@ -1435,7 +1432,7 @@ static void activation_descriptor_init(int node, int pnode, int base_pnode)
{
int i;
int cpu;
unsigned long pa;
unsigned long gpa;
unsigned long m;
unsigned long n;
size_t dsize;
@ -1451,9 +1448,9 @@ static void activation_descriptor_init(int node, int pnode, int base_pnode)
bau_desc = kmalloc_node(dsize, GFP_KERNEL, node);
BUG_ON(!bau_desc);
pa = uv_gpa(bau_desc); /* need the real nasid*/
n = pa >> uv_nshift;
m = pa & uv_mmask;
gpa = uv_gpa(bau_desc);
n = uv_gpa_to_gnode(gpa);
m = uv_gpa_to_offset(gpa);
/* the 14-bit pnode */
write_mmr_descriptor_base(pnode, (n << UV_DESC_PSHIFT | m));
@ -1525,9 +1522,9 @@ static void pq_init(int node, int pnode)
bcp->queue_last = pqp + (DEST_Q_SIZE - 1);
}
/*
* need the pnode of where the memory was really allocated
* need the gnode of where the memory was really allocated
*/
pn = uv_gpa(pqp) >> uv_nshift;
pn = uv_gpa_to_gnode(uv_gpa(pqp));
first = uv_physnodeaddr(pqp);
pn_first = ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) | first;
last = uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1));
@ -1837,8 +1834,6 @@ static int __init uv_bau_init(void)
zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cur_cpu));
}
uv_nshift = uv_hub_info->m_val;
uv_mmask = (1UL << uv_hub_info->m_val) - 1;
nuvhubs = uv_num_possible_blades();
spin_lock_init(&disable_lock);
congested_cycles = usec_2_cycles(congested_respns_us);