diff options
| -rw-r--r-- | xen-mapcache.c | 37 |
1 files changed, 15 insertions, 22 deletions
diff --git a/xen-mapcache.c b/xen-mapcache.c index a539358fb7..2ca18ce3b5 100644 --- a/xen-mapcache.c +++ b/xen-mapcache.c @@ -12,6 +12,7 @@ #include "hw/xen_backend.h" #include "blockdev.h" +#include "bitmap.h" #include <xen/hvm/params.h> #include <sys/mman.h> @@ -32,15 +33,13 @@ #if defined(__i386__) # define MCACHE_BUCKET_SHIFT 16 +# define MCACHE_MAX_SIZE (1UL<<31) /* 2GB Cap */ #elif defined(__x86_64__) # define MCACHE_BUCKET_SHIFT 20 +# define MCACHE_MAX_SIZE (1UL<<35) /* 32GB Cap */ #endif #define MCACHE_BUCKET_SIZE (1UL << MCACHE_BUCKET_SHIFT) -#define BITS_PER_LONG (sizeof(long) * 8) -#define BITS_TO_LONGS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG) -#define DECLARE_BITMAP(name, bits) unsigned long name[BITS_TO_LONGS(bits)] - typedef struct MapCacheEntry { target_phys_addr_t paddr_index; uint8_t *vaddr_base; @@ -69,11 +68,6 @@ typedef struct MapCache { static MapCache *mapcache; -static inline int test_bit(unsigned int bit, const unsigned long *map) -{ - return !!((map)[(bit) / BITS_PER_LONG] & (1UL << ((bit) % BITS_PER_LONG))); -} - void qemu_map_cache_init(void) { unsigned long size; @@ -85,9 +79,14 @@ void qemu_map_cache_init(void) mapcache->last_address_index = -1; getrlimit(RLIMIT_AS, &rlimit_as); - rlimit_as.rlim_cur = rlimit_as.rlim_max; + if (rlimit_as.rlim_max < MCACHE_MAX_SIZE) { + rlimit_as.rlim_cur = rlimit_as.rlim_max; + } else { + rlimit_as.rlim_cur = MCACHE_MAX_SIZE; + } + setrlimit(RLIMIT_AS, &rlimit_as); - mapcache->max_mcache_size = rlimit_as.rlim_max; + mapcache->max_mcache_size = rlimit_as.rlim_cur; mapcache->nr_buckets = (((mapcache->max_mcache_size >> XC_PAGE_SHIFT) + @@ -107,7 +106,7 @@ static void qemu_remap_bucket(MapCacheEntry *entry, uint8_t *vaddr_base; xen_pfn_t *pfns; int *err; - unsigned int i, j; + unsigned int i; target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; trace_qemu_remap_bucket(address_index); @@ -136,17 +135,11 @@ static void qemu_remap_bucket(MapCacheEntry *entry, entry->vaddr_base = vaddr_base; entry->paddr_index = address_index; - for (i = 0; i < nb_pfn; i += BITS_PER_LONG) { - unsigned long word = 0; - if ((i + BITS_PER_LONG) > nb_pfn) { - j = nb_pfn % BITS_PER_LONG; - } else { - j = BITS_PER_LONG; - } - while (j > 0) { - word = (word << 1) | !err[i + --j]; + bitmap_zero(entry->valid_mapping, nb_pfn); + for (i = 0; i < nb_pfn; i++) { + if (!err[i]) { + bitmap_set(entry->valid_mapping, i, 1); } - entry->valid_mapping[i / BITS_PER_LONG] = word; } qemu_free(pfns); |