Patchwork [v7,07/27] loader: support for unmapped ROM blobs

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Submitter Michael S. Tsirkin
Date Oct. 1, 2013, 9:26 p.m.
Message ID <1380662727-24170-8-git-send-email-mst@redhat.com>
Download mbox | patch
Permalink /patch/279589/
State New
Headers show

Comments

Michael S. Tsirkin - Oct. 1, 2013, 9:26 p.m.
Support ROM blobs not mapped into guest memory:
same as ROM files really but use caller's buffer.

Support incoking callback on access and
return memory pointer making it easier
for caller to update memory if necessary.

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/lm32/lm32_hwsetup.h |  2 +-
 include/hw/loader.h    |  7 ++++---
 hw/core/loader.c       | 23 ++++++++++++++++++++---
 3 files changed, 25 insertions(+), 7 deletions(-)
Eric Blake - Oct. 1, 2013, 9:28 p.m.
On 10/01/2013 03:26 PM, Michael S. Tsirkin wrote:
> Support ROM blobs not mapped into guest memory:
> same as ROM files really but use caller's buffer.
> 
> Support incoking callback on access and

s/incoking/incoming/

> return memory pointer making it easier
> for caller to update memory if necessary.
>
Michael S. Tsirkin - Oct. 2, 2013, 5:31 a.m.
On Tue, Oct 01, 2013 at 03:28:34PM -0600, Eric Blake wrote:
> On 10/01/2013 03:26 PM, Michael S. Tsirkin wrote:
> > Support ROM blobs not mapped into guest memory:
> > same as ROM files really but use caller's buffer.
> > 
> > Support incoking callback on access and
> 
> s/incoking/incoming/
> 
> > return memory pointer making it easier
> > for caller to update memory if necessary.
> > 


Thanks!

> -- 
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>

Patch

diff --git a/hw/lm32/lm32_hwsetup.h b/hw/lm32/lm32_hwsetup.h
index 3449bd8..9fd5e69 100644
--- a/hw/lm32/lm32_hwsetup.h
+++ b/hw/lm32/lm32_hwsetup.h
@@ -73,7 +73,7 @@  static inline void hwsetup_free(HWSetup *hw)
 static inline void hwsetup_create_rom(HWSetup *hw,
         hwaddr base)
 {
-    rom_add_blob("hwsetup", hw->data, TARGET_PAGE_SIZE, base);
+    rom_add_blob("hwsetup", hw->data, TARGET_PAGE_SIZE, base, NULL, NULL, NULL);
 }
 
 static inline void hwsetup_add_u8(HWSetup *hw, uint8_t u)
diff --git a/include/hw/loader.h b/include/hw/loader.h
index 6145736..e0c576b 100644
--- a/include/hw/loader.h
+++ b/include/hw/loader.h
@@ -40,8 +40,9 @@  extern bool rom_file_in_ram;
 
 int rom_add_file(const char *file, const char *fw_dir,
                  hwaddr addr, int32_t bootindex);
-int rom_add_blob(const char *name, const void *blob, size_t len,
-                 hwaddr addr);
+void *rom_add_blob(const char *name, const void *blob, size_t len,
+                   hwaddr addr, const char *fw_file_name,
+                   FWCfgReadCallback fw_callback, void *callback_opaque);
 int rom_add_elf_program(const char *name, void *data, size_t datasize,
                         size_t romsize, hwaddr addr);
 int rom_load_all(void);
@@ -53,7 +54,7 @@  void do_info_roms(Monitor *mon, const QDict *qdict);
 #define rom_add_file_fixed(_f, _a, _i)          \
     rom_add_file(_f, NULL, _a, _i)
 #define rom_add_blob_fixed(_f, _b, _l, _a)      \
-    rom_add_blob(_f, _b, _l, _a)
+    (rom_add_blob(_f, _b, _l, _a, NULL, NULL, NULL) ? 0 : -1)
 
 #define PC_ROM_MIN_VGA     0xc0000
 #define PC_ROM_MIN_OPTION  0xc8000
diff --git a/hw/core/loader.c b/hw/core/loader.c
index 7b3d3ee..449bd4c 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -700,10 +700,12 @@  err:
     return -1;
 }
 
-int rom_add_blob(const char *name, const void *blob, size_t len,
-                 hwaddr addr)
+void *rom_add_blob(const char *name, const void *blob, size_t len,
+                   hwaddr addr, const char *fw_file_name,
+                   FWCfgReadCallback fw_callback, void *callback_opaque)
 {
     Rom *rom;
+    void *data = NULL;
 
     rom           = g_malloc0(sizeof(*rom));
     rom->name     = g_strdup(name);
@@ -713,7 +715,22 @@  int rom_add_blob(const char *name, const void *blob, size_t len,
     rom->data     = g_malloc0(rom->datasize);
     memcpy(rom->data, blob, len);
     rom_insert(rom);
-    return 0;
+    if (fw_file_name && fw_cfg) {
+        char devpath[100];
+
+        snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name);
+
+        if (rom_file_in_ram) {
+            data = rom_set_mr(rom, OBJECT(fw_cfg), devpath);
+        } else {
+            data = rom->data;
+        }
+
+        fw_cfg_add_file_callback(fw_cfg, fw_file_name,
+                                 fw_callback, callback_opaque,
+                                 data, rom->romsize);
+    }
+    return data;
 }
 
 /* This function is specific for elf program because we don't need to allocate