From: Juergen Gross Date: Fri, 17 Jul 2015 04:51:26 +0000 (+0200) Subject: xen: move static e820 map to global scope X-Git-Tag: v4.3-rc1~25^2~31 X-Git-Url: http://git.cascardo.info/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=69632ecfcd03b12202ed62dfa0aabac83904f8ac xen: move static e820 map to global scope Instead of using a function local static e820 map in xen_memory_setup() and calling various functions in the same source with the map as a parameter use a map directly accessible by all functions in the source. Signed-off-by: Juergen Gross Reviewed-by: David Vrabel Acked-by: Konrad Rzeszutek Wilk Signed-off-by: David Vrabel --- diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index adad417ca1ba..ab6c36e1801b 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -38,6 +38,10 @@ struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata; /* Number of pages released from the initial allocation. */ unsigned long xen_released_pages; +/* E820 map used during setting up memory. */ +static struct e820entry xen_e820_map[E820MAX] __initdata; +static u32 xen_e820_map_entries __initdata; + /* * Buffer used to remap identity mapped pages. We only need the virtual space. * The physical page behind this address is remapped as needed to different @@ -164,15 +168,13 @@ void __init xen_inv_extra_mem(void) * This function updates min_pfn with the pfn found and returns * the size of that range or zero if not found. */ -static unsigned long __init xen_find_pfn_range( - const struct e820entry *list, size_t map_size, - unsigned long *min_pfn) +static unsigned long __init xen_find_pfn_range(unsigned long *min_pfn) { - const struct e820entry *entry; + const struct e820entry *entry = xen_e820_map; unsigned int i; unsigned long done = 0; - for (i = 0, entry = list; i < map_size; i++, entry++) { + for (i = 0; i < xen_e820_map_entries; i++, entry++) { unsigned long s_pfn; unsigned long e_pfn; @@ -356,9 +358,9 @@ static void __init xen_do_set_identity_and_remap_chunk( * to Xen and not remapped. */ static unsigned long __init xen_set_identity_and_remap_chunk( - const struct e820entry *list, size_t map_size, unsigned long start_pfn, - unsigned long end_pfn, unsigned long nr_pages, unsigned long remap_pfn, - unsigned long *released, unsigned long *remapped) + unsigned long start_pfn, unsigned long end_pfn, unsigned long nr_pages, + unsigned long remap_pfn, unsigned long *released, + unsigned long *remapped) { unsigned long pfn; unsigned long i = 0; @@ -379,8 +381,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk( if (cur_pfn + size > nr_pages) size = nr_pages - cur_pfn; - remap_range_size = xen_find_pfn_range(list, map_size, - &remap_pfn); + remap_range_size = xen_find_pfn_range(&remap_pfn); if (!remap_range_size) { pr_warning("Unable to find available pfn range, not remapping identity pages\n"); xen_set_identity_and_release_chunk(cur_pfn, @@ -411,13 +412,12 @@ static unsigned long __init xen_set_identity_and_remap_chunk( return remap_pfn; } -static void __init xen_set_identity_and_remap( - const struct e820entry *list, size_t map_size, unsigned long nr_pages, - unsigned long *released, unsigned long *remapped) +static void __init xen_set_identity_and_remap(unsigned long nr_pages, + unsigned long *released, unsigned long *remapped) { phys_addr_t start = 0; unsigned long last_pfn = nr_pages; - const struct e820entry *entry; + const struct e820entry *entry = xen_e820_map; unsigned long num_released = 0; unsigned long num_remapped = 0; int i; @@ -433,9 +433,9 @@ static void __init xen_set_identity_and_remap( * example) the DMI tables in a reserved region that begins on * a non-page boundary. */ - for (i = 0, entry = list; i < map_size; i++, entry++) { + for (i = 0; i < xen_e820_map_entries; i++, entry++) { phys_addr_t end = entry->addr + entry->size; - if (entry->type == E820_RAM || i == map_size - 1) { + if (entry->type == E820_RAM || i == xen_e820_map_entries - 1) { unsigned long start_pfn = PFN_DOWN(start); unsigned long end_pfn = PFN_UP(end); @@ -444,9 +444,9 @@ static void __init xen_set_identity_and_remap( if (start_pfn < end_pfn) last_pfn = xen_set_identity_and_remap_chunk( - list, map_size, start_pfn, - end_pfn, nr_pages, last_pfn, - &num_released, &num_remapped); + start_pfn, end_pfn, nr_pages, + last_pfn, &num_released, + &num_remapped); start = end; } } @@ -549,12 +549,12 @@ static void __init xen_align_and_add_e820_region(phys_addr_t start, e820_add_region(start, end - start, type); } -static void __init xen_ignore_unusable(struct e820entry *list, size_t map_size) +static void __init xen_ignore_unusable(void) { - struct e820entry *entry; + struct e820entry *entry = xen_e820_map; unsigned int i; - for (i = 0, entry = list; i < map_size; i++, entry++) { + for (i = 0; i < xen_e820_map_entries; i++, entry++) { if (entry->type == E820_UNUSABLE) entry->type = E820_RAM; } @@ -600,8 +600,6 @@ static void __init xen_reserve_xen_mfnlist(void) **/ char * __init xen_memory_setup(void) { - static struct e820entry map[E820MAX] __initdata; - unsigned long max_pfn = xen_start_info->nr_pages; phys_addr_t mem_end; int rc; @@ -616,7 +614,7 @@ char * __init xen_memory_setup(void) mem_end = PFN_PHYS(max_pfn); memmap.nr_entries = E820MAX; - set_xen_guest_handle(memmap.buffer, map); + set_xen_guest_handle(memmap.buffer, xen_e820_map); op = xen_initial_domain() ? XENMEM_machine_memory_map : @@ -625,15 +623,16 @@ char * __init xen_memory_setup(void) if (rc == -ENOSYS) { BUG_ON(xen_initial_domain()); memmap.nr_entries = 1; - map[0].addr = 0ULL; - map[0].size = mem_end; + xen_e820_map[0].addr = 0ULL; + xen_e820_map[0].size = mem_end; /* 8MB slack (to balance backend allocations). */ - map[0].size += 8ULL << 20; - map[0].type = E820_RAM; + xen_e820_map[0].size += 8ULL << 20; + xen_e820_map[0].type = E820_RAM; rc = 0; } BUG_ON(rc); BUG_ON(memmap.nr_entries == 0); + xen_e820_map_entries = memmap.nr_entries; /* * Xen won't allow a 1:1 mapping to be created to UNUSABLE @@ -644,10 +643,11 @@ char * __init xen_memory_setup(void) * a patch in the future. */ if (xen_initial_domain()) - xen_ignore_unusable(map, memmap.nr_entries); + xen_ignore_unusable(); /* Make sure the Xen-supplied memory map is well-ordered. */ - sanitize_e820_map(map, memmap.nr_entries, &memmap.nr_entries); + sanitize_e820_map(xen_e820_map, xen_e820_map_entries, + &xen_e820_map_entries); max_pages = xen_get_max_pages(); if (max_pages > max_pfn) @@ -657,8 +657,8 @@ char * __init xen_memory_setup(void) * Set identity map on non-RAM pages and prepare remapping the * underlying RAM. */ - xen_set_identity_and_remap(map, memmap.nr_entries, max_pfn, - &xen_released_pages, &remapped_pages); + xen_set_identity_and_remap(max_pfn, &xen_released_pages, + &remapped_pages); extra_pages += xen_released_pages; extra_pages += remapped_pages; @@ -677,10 +677,10 @@ char * __init xen_memory_setup(void) extra_pages = min(EXTRA_MEM_RATIO * min(max_pfn, PFN_DOWN(MAXMEM)), extra_pages); i = 0; - while (i < memmap.nr_entries) { - phys_addr_t addr = map[i].addr; - phys_addr_t size = map[i].size; - u32 type = map[i].type; + while (i < xen_e820_map_entries) { + phys_addr_t addr = xen_e820_map[i].addr; + phys_addr_t size = xen_e820_map[i].size; + u32 type = xen_e820_map[i].type; if (type == E820_RAM) { if (addr < mem_end) { @@ -696,9 +696,9 @@ char * __init xen_memory_setup(void) xen_align_and_add_e820_region(addr, size, type); - map[i].addr += size; - map[i].size -= size; - if (map[i].size == 0) + xen_e820_map[i].addr += size; + xen_e820_map[i].size -= size; + if (xen_e820_map[i].size == 0) i++; } @@ -709,7 +709,7 @@ char * __init xen_memory_setup(void) * PFNs above MAX_P2M_PFN are considered identity mapped as * well. */ - set_phys_range_identity(map[i-1].addr / PAGE_SIZE, ~0ul); + set_phys_range_identity(xen_e820_map[i - 1].addr / PAGE_SIZE, ~0ul); /* * In domU, the ISA region is normal, usable memory, but we @@ -731,23 +731,25 @@ char * __init xen_memory_setup(void) */ char * __init xen_auto_xlated_memory_setup(void) { - static struct e820entry map[E820MAX] __initdata; - struct xen_memory_map memmap; int i; int rc; memmap.nr_entries = E820MAX; - set_xen_guest_handle(memmap.buffer, map); + set_xen_guest_handle(memmap.buffer, xen_e820_map); rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); if (rc < 0) panic("No memory map (%d)\n", rc); - sanitize_e820_map(map, ARRAY_SIZE(map), &memmap.nr_entries); + xen_e820_map_entries = memmap.nr_entries; + + sanitize_e820_map(xen_e820_map, ARRAY_SIZE(xen_e820_map), + &xen_e820_map_entries); - for (i = 0; i < memmap.nr_entries; i++) - e820_add_region(map[i].addr, map[i].size, map[i].type); + for (i = 0; i < xen_e820_map_entries; i++) + e820_add_region(xen_e820_map[i].addr, xen_e820_map[i].size, + xen_e820_map[i].type); xen_reserve_xen_mfnlist();