From 4f70f7a91bffdcc39f088748dc678953eb9a3fbd Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 12 Aug 2008 18:33:56 -0700 Subject: sparc64: Implement IRQ stacks. Signed-off-by: David S. Miller --- arch/sparc64/mm/init.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/sparc64/mm/init.c') diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 4e821b3ecb0..217de3ea29e 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -49,6 +49,7 @@ #include #include #include +#include #define MAX_PHYS_ADDRESS (1UL << 42UL) #define KPTE_BITMAP_CHUNK_SZ (256UL * 1024UL * 1024UL) @@ -1771,6 +1772,16 @@ void __init paging_init(void) if (tlb_type == hypervisor) sun4v_mdesc_init(); + /* Once the OF device tree and MDESC have been setup, we know + * the list of possible cpus. Therefore we can allocate the + * IRQ stacks. + */ + for_each_possible_cpu(i) { + /* XXX Use node local allocations... XXX */ + softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE)); + hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE)); + } + /* Setup bootmem... */ last_valid_pfn = end_pfn = bootmem_init(phys_base); -- cgit v1.2.3 From c918dcce92f76bb9903e4d049f4780bad384c207 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 14 Aug 2008 01:41:39 -0700 Subject: sparc64: Fix overshoot in nid_range(). If 'start' does not begin on a page boundary, we can overshoot past 'end'. Signed-off-by: David S. Miller --- arch/sparc64/mm/init.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/sparc64/mm/init.c') diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 217de3ea29e..64d8e7623e0 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -796,6 +796,9 @@ static unsigned long nid_range(unsigned long start, unsigned long end, start += PAGE_SIZE; } + if (start > end) + start = end; + return start; } #else -- cgit v1.2.3 From f2b6079464fc73cf12f08248180a618f05033a70 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 14 Aug 2008 01:45:41 -0700 Subject: sparc64: Fix cmdline_memory_size handling bugs. First, lmb_enforce_memory_limit() interprets it's argument (mostly, heh) as a size limit not an address limit. So pass the raw cmdline_memory_size value into it. And we don't need to check it against zero, lmb_enforce_memory_limit() does that for us. Next, free_initmem() needs special handling when the kernel command line trims the available memory. The problem case is if the trimmed out memory is where the kernel image itself resides. When that memory is trimmed out, we don't add those physical ram areas to the sparsemem active ranges, amongst other things. Which means that this free_initmem() code will free up invalid page structs, resulting in either crashes or hangs. Just quick fix this by not freeing initmem at all if "mem=" was given on the boot command line. Signed-off-by: David S. Miller --- arch/sparc64/mm/init.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) (limited to 'arch/sparc64/mm/init.c') diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index 64d8e7623e0..b4aeb0f696d 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1726,8 +1726,7 @@ void __init paging_init(void) find_ramdisk(phys_base); - if (cmdline_memory_size) - lmb_enforce_memory_limit(phys_base + cmdline_memory_size); + lmb_enforce_memory_limit(cmdline_memory_size); lmb_analyze(); lmb_dump_all(); @@ -1964,6 +1963,15 @@ void __init mem_init(void) void free_initmem(void) { unsigned long addr, initend; + int do_free = 1; + + /* If the physical memory maps were trimmed by kernel command + * line options, don't even try freeing this initmem stuff up. + * The kernel image could have been in the trimmed out region + * and if so the freeing below will free invalid page structs. + */ + if (cmdline_memory_size) + do_free = 0; /* * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. @@ -1978,13 +1986,16 @@ void free_initmem(void) ((unsigned long) __va(kern_base)) - ((unsigned long) KERNBASE)); memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE); - p = virt_to_page(page); - ClearPageReserved(p); - init_page_count(p); - __free_page(p); - num_physpages++; - totalram_pages++; + if (do_free) { + p = virt_to_page(page); + + ClearPageReserved(p); + init_page_count(p); + __free_page(p); + num_physpages++; + totalram_pages++; + } } } -- cgit v1.2.3 From dbb8c35d9063fe233626865cc836fbc102fa083b Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sat, 30 Aug 2008 02:04:45 -0700 Subject: sparc64: setup_valid_addr_bitmap_from_pavail() should be __init Signed-off-by: David S. Miller --- arch/sparc64/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sparc64/mm/init.c') diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index b4aeb0f696d..a41df7bef03 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1843,7 +1843,7 @@ static int pavail_rescan_ents __initdata; * memory list again, and make sure it provides at least as much * memory as 'pavail' does. */ -static void setup_valid_addr_bitmap_from_pavail(void) +static void __init setup_valid_addr_bitmap_from_pavail(void) { int i; -- cgit v1.2.3