From: Liu Ping Fan <pingfank@xxxxxxxxxxxxxxxxxx>
PhysMap contain the flatview and radix-tree view, they are snapshot
of system topology and should be consistent. With PhysMap, we can
swap the pointer when updating and achieve the atomic.
Signed-off-by: Liu Ping Fan <pingfank@xxxxxxxxxxxxxxxxxx>
---
exec.c | 8 --------
memory.c | 33 ---------------------------------
memory.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 60 insertions(+), 43 deletions(-)
diff --git a/exec.c b/exec.c
index 0e29ef9..01b91b0 100644
--- a/exec.c
+++ b/exec.c
@@ -156,8 +156,6 @@ typedef struct PageDesc {
#endif
/* Size of the L2 (and L3, etc) page tables. */
-#define L2_BITS 10
-#define L2_SIZE (1 << L2_BITS)
#define P_L2_LEVELS \
(((TARGET_PHYS_ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / L2_BITS) + 1)
@@ -185,7 +183,6 @@ uintptr_t qemu_host_page_mask;
static void *l1_map[V_L1_SIZE];
#if !defined(CONFIG_USER_ONLY)
-typedef struct PhysPageEntry PhysPageEntry;
static MemoryRegionSection *phys_sections;
static unsigned phys_sections_nb, phys_sections_nb_alloc;
@@ -194,11 +191,6 @@ static uint16_t phys_section_notdirty;
static uint16_t phys_section_rom;
static uint16_t phys_section_watch;
-struct PhysPageEntry {
- uint16_t is_leaf : 1;
- /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
- uint16_t ptr : 15;
-};
/* Simple allocator for PhysPageEntry nodes */
static PhysPageEntry (*phys_map_nodes)[L2_SIZE];
diff --git a/memory.c b/memory.c
index 2eaa2fc..c7f2cfd 100644
--- a/memory.c
+++ b/memory.c
@@ -31,17 +31,6 @@ static bool global_dirty_log = false;
static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
= QTAILQ_HEAD_INITIALIZER(memory_listeners);
-typedef struct AddrRange AddrRange;
-
-/*
- * Note using signed integers limits us to physical addresses at most
- * 63 bits wide. They are needed for negative offsetting in aliases
- * (large MemoryRegion::alias_offset).
- */
-struct AddrRange {
- Int128 start;
- Int128 size;
-};
static AddrRange addrrange_make(Int128 start, Int128 size)
{
@@ -197,28 +186,6 @@ static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd a,
&& !memory_region_ioeventfd_before(b, a);
}
-typedef struct FlatRange FlatRange;
-typedef struct FlatView FlatView;
-
-/* Range of memory in the global map. Addresses are absolute. */
-struct FlatRange {
- MemoryRegion *mr;
- target_phys_addr_t offset_in_region;
- AddrRange addr;
- uint8_t dirty_log_mask;
- bool readable;
- bool readonly;
-};
-
-/* Flattened global view of current active memory hierarchy. Kept in sorted
- * order.
- */
-struct FlatView {
- FlatRange *ranges;
- unsigned nr;
- unsigned nr_allocated;
-};
-
typedef struct AddressSpace AddressSpace;
typedef struct AddressSpaceOps AddressSpaceOps;
diff --git a/memory.h b/memory.h
index 740f018..357edd8 100644
--- a/memory.h
+++ b/memory.h
@@ -29,12 +29,72 @@
#include "qemu-thread.h"
#include "qemu/reclaimer.h"
+typedef struct AddrRange AddrRange;
+typedef struct FlatRange FlatRange;
+typedef struct FlatView FlatView;
+typedef struct PhysPageEntry PhysPageEntry;
+typedef struct PhysMap PhysMap;
+typedef struct MemoryRegionSection MemoryRegionSection;
typedef struct MemoryRegionOps MemoryRegionOps;
typedef struct MemoryRegionLifeOps MemoryRegionLifeOps;
typedef struct MemoryRegion MemoryRegion;
typedef struct MemoryRegionPortio MemoryRegionPortio;
typedef struct MemoryRegionMmio MemoryRegionMmio;
+/*
+ * Note using signed integers limits us to physical addresses at most
+ * 63 bits wide. They are needed for negative offsetting in aliases
+ * (large MemoryRegion::alias_offset).
+ */
+struct AddrRange {
+ Int128 start;
+ Int128 size;
+};
+
+/* Range of memory in the global map. Addresses are absolute. */
+struct FlatRange {
+ MemoryRegion *mr;
+ target_phys_addr_t offset_in_region;
+ AddrRange addr;
+ uint8_t dirty_log_mask;
+ bool readable;
+ bool readonly;
+};
+
+/* Flattened global view of current active memory hierarchy. Kept in sorted
+ * order.
+ */
+struct FlatView {
+ FlatRange *ranges;
+ unsigned nr;
+ unsigned nr_allocated;
+};
+
+struct PhysPageEntry {
+ uint16_t is_leaf:1;
+ /* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
+ uint16_t ptr:15;
+};
+
+#define L2_BITS 10
+#define L2_SIZE (1 << L2_BITS)
+/* This is a multi-level map on the physical address space.
+ The bottom level has pointers to MemoryRegionSections. */
+struct PhysMap {
+ Atomic ref;
+ PhysPageEntry root;
+ PhysPageEntry (*phys_map_nodes)[L2_SIZE];
+ unsigned phys_map_nodes_nb;
+ unsigned phys_map_nodes_nb_alloc;
+
+ MemoryRegionSection *phys_sections;
+ unsigned phys_sections_nb;
+ unsigned phys_sections_nb_alloc;
+
+ /* FlatView */
+ FlatView views[2];
+};
+
/* Must match *_DIRTY_FLAGS in cpu-all.h. To be replaced with dynamic
* registration.
*/
@@ -167,8 +227,6 @@ struct MemoryRegionPortio {
#define PORTIO_END_OF_LIST() { }
-typedef struct MemoryRegionSection MemoryRegionSection;
-
/**
* MemoryRegionSection: describes a fragment of a #MemoryRegion
*
--
1.7.4.4
--
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