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[Qemu-devel] [PATCH 10/10] introduce qemu_ram_map
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 10/10] introduce qemu_ram_map |
Date: |
Mon, 26 Apr 2010 14:59:06 -0300 |
Which allows drivers to register an mmaped region into ram block mappings.
To be used by device assignment driver.
CC: Cam Macdonell <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
---
cpu-common.h | 1 +
exec.c | 28 ++++++++++++++++++++++++++++
2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/cpu-common.h b/cpu-common.h
index b24cecc..2dfde6f 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -40,6 +40,7 @@ static inline void
cpu_register_physical_memory(target_phys_addr_t start_addr,
}
ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr);
+ram_addr_t qemu_ram_map(ram_addr_t size, void *host);
ram_addr_t qemu_ram_alloc(ram_addr_t);
void qemu_ram_free(ram_addr_t addr);
/* This should only be used for ram local to a device. */
diff --git a/exec.c b/exec.c
index 14d1fd7..648a9c9 100644
--- a/exec.c
+++ b/exec.c
@@ -2789,6 +2789,34 @@ static void *file_ram_alloc(ram_addr_t memory, const
char *path)
}
#endif
+ram_addr_t qemu_ram_map(ram_addr_t size, void *host)
+{
+ RAMBlock *new_block;
+
+ size = TARGET_PAGE_ALIGN(size);
+ new_block = qemu_malloc(sizeof(*new_block));
+
+ new_block->host = host;
+
+ new_block->offset = last_ram_offset;
+ new_block->length = size;
+
+ new_block->next = ram_blocks;
+ ram_blocks = new_block;
+
+ phys_ram_dirty = qemu_realloc(phys_ram_dirty,
+ (last_ram_offset + size) >> TARGET_PAGE_BITS);
+ memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS),
+ 0xff, size >> TARGET_PAGE_BITS);
+
+ last_ram_offset += size;
+
+ if (kvm_enabled())
+ kvm_setup_guest_memory(new_block->host, size);
+
+ return new_block->offset;
+}
+
ram_addr_t qemu_ram_alloc(ram_addr_t size)
{
RAMBlock *new_block;
--
1.6.6.1
- [Qemu-devel] [PATCH 02/10] target-i386: print EFER in cpu_dump_state, (continued)
- [Qemu-devel] [PATCH 03/10] kvm: handle internal error, Marcelo Tosatti, 2010/04/26
- [Qemu-devel] [PATCH 05/10] kvm_init_vcpu requires global lock held, Marcelo Tosatti, 2010/04/26
- [Qemu-devel] [PATCH 04/10] kvm: allow qemu to set EPT identity mapping address, Marcelo Tosatti, 2010/04/26
- [Qemu-devel] [PATCH 08/10] introduce leul_to_cpu, Marcelo Tosatti, 2010/04/26
- [Qemu-devel] [PATCH 10/10] introduce qemu_ram_map,
Marcelo Tosatti <=
[Qemu-devel] Re: [PATCH 10/10] introduce qemu_ram_map, Anthony Liguori, 2010/04/26