From f6f363c1f4f962aee9f69c67ab2f3ff58c30f8c1 Mon Sep 17 00:00:00 2001 From: John Snow Date: Mon, 19 Jan 2015 15:15:54 -0500 Subject: [PATCH] libqos: Update QGuestAllocator to be opaque MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit To avoid the architecture-specific implementations of the generic qtest allocator having to know about fields within the allocator, add a page_size setter method for users or arch specializations to use. The allocator will assume a default page_size for general use, but it can always be overridden. Since this was the last instance of code directly using properties of the QGuestAllocator object directly, modify the type to be opaque and move the structure inside of malloc.c. mlist_new, which was previously exported, is made static local to malloc.c, as it has no external users. [Peter Maydell reported the following clang warning: tests/libqos/malloc.c:35:3: warning: redefinition of typedef 'QGuestAllocator' is a C11 feature [-Wtypedef-redefinition] } QGuestAllocator; I converted typedef struct ... QGuestAllocator; to struct ...; --Stefan] Signed-off-by: John Snow Reviewed-by: Marc Marí Message-id: 1421698563-6977-7-git-send-email-jsnow@redhat.com Signed-off-by: Stefan Hajnoczi --- tests/libqos/malloc-pc.c | 2 +- tests/libqos/malloc.c | 61 ++++++++++++++++++++++++++++++++++++------------ tests/libqos/malloc.h | 22 +++-------------- 3 files changed, 50 insertions(+), 35 deletions(-) diff --git a/tests/libqos/malloc-pc.c b/tests/libqos/malloc-pc.c index 6a5fdf360a..6e253b6877 100644 --- a/tests/libqos/malloc-pc.c +++ b/tests/libqos/malloc-pc.c @@ -38,7 +38,7 @@ QGuestAllocator *pc_alloc_init_flags(QAllocOpts flags) ram_size = qfw_cfg_get_u64(fw_cfg, FW_CFG_RAM_SIZE); s = alloc_init_flags(flags, 1 << 20, MIN(ram_size, 0xE0000000)); - s->page_size = PAGE_SIZE; + alloc_set_page_size(s, PAGE_SIZE); /* clean-up */ g_free(fw_cfg); diff --git a/tests/libqos/malloc.c b/tests/libqos/malloc.c index 4ff260f085..42e34345ad 100644 --- a/tests/libqos/malloc.c +++ b/tests/libqos/malloc.c @@ -16,6 +16,26 @@ #include #include +typedef QTAILQ_HEAD(MemList, MemBlock) MemList; + +typedef struct MemBlock { + QTAILQ_ENTRY(MemBlock) MLIST_ENTNAME; + uint64_t size; + uint64_t addr; +} MemBlock; + +struct QGuestAllocator { + QAllocOpts opts; + uint64_t start; + uint64_t end; + uint32_t page_size; + + MemList used; + MemList free; +}; + +#define DEFAULT_PAGE_SIZE 4096 + static void mlist_delete(MemList *list, MemBlock *node) { g_assert(list && node); @@ -103,6 +123,21 @@ static void mlist_coalesce(MemList *head, MemBlock *node) } while (merge); } +static MemBlock *mlist_new(uint64_t addr, uint64_t size) +{ + MemBlock *block; + + if (!size) { + return NULL; + } + block = g_malloc0(sizeof(MemBlock)); + + block->addr = addr; + block->size = size; + + return block; +} + static uint64_t mlist_fulfill(QGuestAllocator *s, MemBlock *freenode, uint64_t size) { @@ -187,21 +222,6 @@ static void mlist_free(QGuestAllocator *s, uint64_t addr) mlist_coalesce(&s->free, node); } -MemBlock *mlist_new(uint64_t addr, uint64_t size) -{ - MemBlock *block; - - if (!size) { - return NULL; - } - block = g_malloc0(sizeof(MemBlock)); - - block->addr = addr; - block->size = size; - - return block; -} - /* * Mostly for valgrind happiness, but it does offer * a chokepoint for debugging guest memory leaks, too. @@ -283,6 +303,8 @@ QGuestAllocator *alloc_init(uint64_t start, uint64_t end) node = mlist_new(s->start, s->end - s->start); QTAILQ_INSERT_HEAD(&s->free, node, MLIST_ENTNAME); + s->page_size = DEFAULT_PAGE_SIZE; + return s; } @@ -293,3 +315,12 @@ QGuestAllocator *alloc_init_flags(QAllocOpts opts, s->opts = opts; return s; } + +void alloc_set_page_size(QGuestAllocator *allocator, size_t page_size) +{ + /* Can't alter the page_size for an allocator in-use */ + g_assert(QTAILQ_EMPTY(&allocator->used)); + + g_assert(is_power_of_2(page_size)); + allocator->page_size = page_size; +} diff --git a/tests/libqos/malloc.h b/tests/libqos/malloc.h index 7b2954784f..a39dba49b0 100644 --- a/tests/libqos/malloc.h +++ b/tests/libqos/malloc.h @@ -17,8 +17,6 @@ #include #include "qemu/queue.h" -#define MLIST_ENTNAME entries - typedef enum { ALLOC_NO_FLAGS = 0x00, ALLOC_LEAK_WARN = 0x01, @@ -26,24 +24,8 @@ typedef enum { ALLOC_PARANOID = 0x04 } QAllocOpts; -typedef QTAILQ_HEAD(MemList, MemBlock) MemList; -typedef struct MemBlock { - QTAILQ_ENTRY(MemBlock) MLIST_ENTNAME; - uint64_t size; - uint64_t addr; -} MemBlock; - -typedef struct QGuestAllocator { - QAllocOpts opts; - uint64_t start; - uint64_t end; - uint32_t page_size; +typedef struct QGuestAllocator QGuestAllocator; - MemList used; - MemList free; -} QGuestAllocator; - -MemBlock *mlist_new(uint64_t addr, uint64_t size); void alloc_uninit(QGuestAllocator *allocator); /* Always returns page aligned values */ @@ -53,4 +35,6 @@ void guest_free(QGuestAllocator *allocator, uint64_t addr); QGuestAllocator *alloc_init(uint64_t start, uint64_t end); QGuestAllocator *alloc_init_flags(QAllocOpts flags, uint64_t start, uint64_t end); +void alloc_set_page_size(QGuestAllocator *allocator, size_t page_size); + #endif -- 2.11.4.GIT