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Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

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Pull tile updates from Chris Metcalf:
 "These changes cover a range of new arch/tile features and
  optimizations.  They've been through LKML review and on linux-next for
  a month or so.  There's also one bug-fix that just missed 3.4, which
  I've marked for stable."

Fixed up trivial conflict in arch/tile/Kconfig (new added tile Kconfig
entries clashing with the generic timer/clockevents changes).

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: default to tilegx_defconfig for ARCH=tile
  tile: fix bug where fls(0) was not returning 0
  arch/tile: mark TILEGX as not EXPERIMENTAL
  tile/mm/fault.c: Port OOM changes to handle_page_fault
  arch/tile: add descriptive text if the kernel reports a bad trap
  arch/tile: allow querying cpu module information from the hypervisor
  arch/tile: fix hardwall for tilegx and generalize for idn and ipi
  arch/tile: support multiple huge page sizes dynamically
  mm: add new arch_make_huge_pte() method for tile support
  arch/tile: support kexec() for tilegx
  arch/tile: support <asm/cachectl.h> header for cacheflush() syscall
  arch/tile: Allow tilegx to build with either 16K or 64K page size
  arch/tile: optimize get_user/put_user and friends
  arch/tile: support building big-endian kernel
  arch/tile: allow building Linux with transparent huge pages enabled
  arch/tile: use interrupt critical sections less
This commit is contained in:
Linus Torvalds
2012-05-25 15:59:38 -07:00
parent 109b9b0408 1fcb78e9da
commit fa2af6e4fe
74 changed files with 2472 additions and 1170 deletions
Download Patch File Download Diff File Expand all files Collapse all files

177
arch/tile/kernel/setup.c
View File

@@ -28,6 +28,7 @@
#include <linux/highmem.h>
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/hugetlb.h>
#include <asm/setup.h>
#include <asm/sections.h>
#include <asm/cacheflush.h>
@@ -49,9 +50,6 @@ char chip_model[64] __write_once;
struct pglist_data node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);
/* We only create bootmem data on node 0. */
static bootmem_data_t __initdata node0_bdata;
/* Information on the NUMA nodes that we compute early */
unsigned long __cpuinitdata node_start_pfn[MAX_NUMNODES];
unsigned long __cpuinitdata node_end_pfn[MAX_NUMNODES];
@@ -534,37 +532,96 @@ static void __init setup_memory(void)
#endif
}
static void __init setup_bootmem_allocator(void)
/*
* On 32-bit machines, we only put bootmem on the low controller,
* since PAs > 4GB can't be used in bootmem. In principle one could
* imagine, e.g., multiple 1 GB controllers all of which could support
* bootmem, but in practice using controllers this small isn't a
* particularly interesting scenario, so we just keep it simple and
* use only the first controller for bootmem on 32-bit machines.
*/
static inline int node_has_bootmem(int nid)
{
unsigned long bootmap_size, first_alloc_pfn, last_alloc_pfn;
/* Provide a node 0 bdata. */
NODE_DATA(0)->bdata = &node0_bdata;
#ifdef CONFIG_PCI
/* Don't let boot memory alias the PCI region. */
last_alloc_pfn = min(max_low_pfn, pci_reserve_start_pfn);
#ifdef CONFIG_64BIT
return 1;
#else
last_alloc_pfn = max_low_pfn;
return nid == 0;
#endif
}
static inline unsigned long alloc_bootmem_pfn(int nid,
unsigned long size,
unsigned long goal)
{
void *kva = __alloc_bootmem_node(NODE_DATA(nid), size,
PAGE_SIZE, goal);
unsigned long pfn = kaddr_to_pfn(kva);
BUG_ON(goal && PFN_PHYS(pfn) != goal);
return pfn;
}
static void __init setup_bootmem_allocator_node(int i)
{
unsigned long start, end, mapsize, mapstart;
if (node_has_bootmem(i)) {
NODE_DATA(i)->bdata = &bootmem_node_data[i];
} else {
/* Share controller zero's bdata for now. */
NODE_DATA(i)->bdata = &bootmem_node_data[0];
return;
}
/* Skip up to after the bss in node 0. */
start = (i == 0) ? min_low_pfn : node_start_pfn[i];
/* Only lowmem, if we're a HIGHMEM build. */
#ifdef CONFIG_HIGHMEM
end = node_lowmem_end_pfn[i];
#else
end = node_end_pfn[i];
#endif
/*
* Initialize the boot-time allocator (with low memory only):
* The first argument says where to put the bitmap, and the
* second says where the end of allocatable memory is.
*/
bootmap_size = init_bootmem(min_low_pfn, last_alloc_pfn);
/* No memory here. */
if (end == start)
return;
/*
* Let the bootmem allocator use all the space we've given it
* except for its own bitmap.
*/
first_alloc_pfn = min_low_pfn + PFN_UP(bootmap_size);
if (first_alloc_pfn >= last_alloc_pfn)
early_panic("Not enough memory on controller 0 for bootmem\n");
/* Figure out where the bootmem bitmap is located. */
mapsize = bootmem_bootmap_pages(end - start);
if (i == 0) {
/* Use some space right before the heap on node 0. */
mapstart = start;
start += mapsize;
} else {
/* Allocate bitmap on node 0 to avoid page table issues. */
mapstart = alloc_bootmem_pfn(0, PFN_PHYS(mapsize), 0);
}
free_bootmem(PFN_PHYS(first_alloc_pfn),
PFN_PHYS(last_alloc_pfn - first_alloc_pfn));
/* Initialize a node. */
init_bootmem_node(NODE_DATA(i), mapstart, start, end);
/* Free all the space back into the allocator. */
free_bootmem(PFN_PHYS(start), PFN_PHYS(end - start));
#if defined(CONFIG_PCI)
/*
* Throw away any memory aliased by the PCI region. FIXME: this
* is a temporary hack to work around bug 10502, and needs to be
* fixed properly.
*/
if (pci_reserve_start_pfn < end && pci_reserve_end_pfn > start)
reserve_bootmem(PFN_PHYS(pci_reserve_start_pfn),
PFN_PHYS(pci_reserve_end_pfn -
pci_reserve_start_pfn),
BOOTMEM_EXCLUSIVE);
#endif
}
static void __init setup_bootmem_allocator(void)
{
int i;
for (i = 0; i < MAX_NUMNODES; ++i)
setup_bootmem_allocator_node(i);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
@@ -595,14 +652,6 @@ static int __init percpu_size(void)
return size;
}
static inline unsigned long alloc_bootmem_pfn(int size, unsigned long goal)
{
void *kva = __alloc_bootmem(size, PAGE_SIZE, goal);
unsigned long pfn = kaddr_to_pfn(kva);
BUG_ON(goal && PFN_PHYS(pfn) != goal);
return pfn;
}
static void __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = { 0 };
@@ -640,21 +689,22 @@ static void __init zone_sizes_init(void)
* though, there'll be no lowmem, so we just alloc_bootmem
* the memmap. There will be no percpu memory either.
*/
if (__pfn_to_highbits(start) == 0) {
/* In low PAs, allocate via bootmem. */
if (i != 0 && cpu_isset(i, isolnodes)) {
node_memmap_pfn[i] =
alloc_bootmem_pfn(0, memmap_size, 0);
BUG_ON(node_percpu[i] != 0);
} else if (node_has_bootmem(start)) {
unsigned long goal = 0;
node_memmap_pfn[i] =
alloc_bootmem_pfn(memmap_size, goal);
alloc_bootmem_pfn(i, memmap_size, 0);
if (kdata_huge)
goal = PFN_PHYS(lowmem_end) - node_percpu[i];
if (node_percpu[i])
node_percpu_pfn[i] =
alloc_bootmem_pfn(node_percpu[i], goal);
} else if (cpu_isset(i, isolnodes)) {
node_memmap_pfn[i] = alloc_bootmem_pfn(memmap_size, 0);
BUG_ON(node_percpu[i] != 0);
alloc_bootmem_pfn(i, node_percpu[i],
goal);
} else {
/* In high PAs, just reserve some pages. */
/* In non-bootmem zones, just reserve some pages. */
node_memmap_pfn[i] = node_free_pfn[i];
node_free_pfn[i] += PFN_UP(memmap_size);
if (!kdata_huge) {
@@ -678,16 +728,9 @@ static void __init zone_sizes_init(void)
zones_size[ZONE_NORMAL] = end - start;
#endif
/*
* Everyone shares node 0's bootmem allocator, but
* we use alloc_remap(), above, to put the actual
* struct page array on the individual controllers,
* which is most of the data that we actually care about.
* We can't place bootmem allocators on the other
* controllers since the bootmem allocator can only
* operate on 32-bit physical addresses.
*/
NODE_DATA(i)->bdata = NODE_DATA(0)->bdata;
/* Take zone metadata from controller 0 if we're isolnode. */
if (node_isset(i, isolnodes))
NODE_DATA(i)->bdata = &bootmem_node_data[0];
free_area_init_node(i, zones_size, start, NULL);
printk(KERN_DEBUG " Normal zone: %ld per-cpu pages\n",
@@ -870,6 +913,22 @@ subsys_initcall(topology_init);
#endif /* CONFIG_NUMA */
/*
* Initialize hugepage support on this cpu. We do this on all cores
* early in boot: before argument parsing for the boot cpu, and after
* argument parsing but before the init functions run on the secondaries.
* So the values we set up here in the hypervisor may be overridden on
* the boot cpu as arguments are parsed.
*/
static __cpuinit void init_super_pages(void)
{
#ifdef CONFIG_HUGETLB_SUPER_PAGES
int i;
for (i = 0; i < HUGE_SHIFT_ENTRIES; ++i)
hv_set_pte_super_shift(i, huge_shift[i]);
#endif
}
/**
* setup_cpu() - Do all necessary per-cpu, tile-specific initialization.
* @boot: Is this the boot cpu?
@@ -924,6 +983,8 @@ void __cpuinit setup_cpu(int boot)
/* Reset the network state on this cpu. */
reset_network_state();
#endif
init_super_pages();
}
#ifdef CONFIG_BLK_DEV_INITRD
@@ -1412,13 +1473,13 @@ void __init setup_per_cpu_areas(void)
for (i = 0; i < size; i += PAGE_SIZE, ++pfn, ++pg) {
/* Update the vmalloc mapping and page home. */
pte_t *ptep =
virt_to_pte(NULL, (unsigned long)ptr + i);
unsigned long addr = (unsigned long)ptr + i;
pte_t *ptep = virt_to_pte(NULL, addr);
pte_t pte = *ptep;
BUG_ON(pfn != pte_pfn(pte));
pte = hv_pte_set_mode(pte, HV_PTE_MODE_CACHE_TILE_L3);
pte = set_remote_cache_cpu(pte, cpu);
set_pte(ptep, pte);
set_pte_at(&init_mm, addr, ptep, pte);
/* Update the lowmem mapping for consistency. */
lowmem_va = (unsigned long)pfn_to_kaddr(pfn);
@@ -1431,7 +1492,7 @@ void __init setup_per_cpu_areas(void)
BUG_ON(pte_huge(*ptep));
}
BUG_ON(pfn != pte_pfn(*ptep));
set_pte(ptep, pte);
set_pte_at(&init_mm, lowmem_va, ptep, pte);
}
}