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[Qemu-devel] [PULL v2 09/65] libqos: Update QGuestAllocator to be opaque
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL v2 09/65] libqos: Update QGuestAllocator to be opaque |
Date: |
Mon, 16 Feb 2015 15:45:34 +0000 |
From: John Snow <address@hidden>
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 <address@hidden> 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 <address@hidden>
Reviewed-by: Marc MarĂ <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
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 6a5fdf3..6e253b6 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 4ff260f..42e3434 100644
--- a/tests/libqos/malloc.c
+++ b/tests/libqos/malloc.c
@@ -16,6 +16,26 @@
#include <inttypes.h>
#include <glib.h>
+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 7b29547..a39dba4 100644
--- a/tests/libqos/malloc.h
+++ b/tests/libqos/malloc.h
@@ -17,8 +17,6 @@
#include <sys/types.h>
#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
--
2.1.0
- [Qemu-devel] [PULL v2 00/65] Block patches, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 03/65] iotests: Add test for drive-mirror with NBD target, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 01/65] nbd: Drop BDS backpointer, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 04/65] libqos: Split apart pc_alloc_init, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 02/65] iotests: Add "wait" functionality to _cleanup_qemu, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 06/65] libqos: create libqos.c, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 08/65] libqos: add alloc_init_flags, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 07/65] libqos: add qtest_vboot, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 05/65] qtest/ahci: Create ahci.h, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 09/65] libqos: Update QGuestAllocator to be opaque,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL v2 10/65] libqos: add pc specific interface, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 12/65] qtest/ahci: finalize AHCIQState consolidation, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 15/65] libqos/ahci: Functional register helpers, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 11/65] qtest/ahci: Store hba_base in AHCIQState, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 13/65] qtest/ahci: remove pcibus global, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 16/65] qtest/ahci: remove getter/setter macros, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 17/65] qtest/ahci: Bookmark FB and CLB pointers, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 14/65] qtest/ahci: remove guest_malloc global, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 18/65] libqos/ahci: create libqos/ahci.c, Stefan Hajnoczi, 2015/02/16
- [Qemu-devel] [PULL v2 19/65] dataplane: endianness-aware accesses, Stefan Hajnoczi, 2015/02/16