If we found initrd through fw_cfg, we can load it and use the
first module of hvm_start_info to pass initrd address and size
to the kernel.
Signed-off-by: Stefano Garzarella <address@hidden>
---
pc-bios/optionrom/pvh_main.c | 21 +++++++++++++++++++--
pc-bios/pvh.bin | Bin 1536 -> 1536 bytes
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/pc-bios/optionrom/pvh_main.c b/pc-bios/optionrom/pvh_main.c
index f355476e68..d1b8b4b96e 100644
--- a/pc-bios/optionrom/pvh_main.c
+++ b/pc-bios/optionrom/pvh_main.c
@@ -46,6 +46,7 @@ struct pvh_e820_table {
struct pvh_e820_table pvh_e820 __attribute__ ((aligned));
static struct hvm_start_info start_info;
+static struct hvm_modlist_entry ramdisk_mod;
static uint8_t cmdline_buffer[CMDLINE_BUFSIZE];
@@ -71,8 +72,8 @@ extern void pvh_load_kernel(void) asm("pvh_load_kernel");
void pvh_load_kernel(void)
{
void *cmdline_addr = &cmdline_buffer;
- void *kernel_entry;
- uint32_t cmdline_size, fw_cfg_version = bios_cfg_version();
+ void *kernel_entry, *initrd_addr;
+ uint32_t cmdline_size, initrd_size, fw_cfg_version = bios_cfg_version();
start_info.magic = XEN_HVM_START_MAGIC_VALUE;
start_info.version = 1;
@@ -110,6 +111,22 @@ void pvh_load_kernel(void)
fw_cfg_version);
start_info.cmdline_paddr = (uintptr_t)cmdline_addr;
+ /* Check if we have the initrd to load */
+ bios_cfg_read_entry(&initrd_size, FW_CFG_INITRD_SIZE, 4, fw_cfg_version);
+ if (initrd_size) {
+ bios_cfg_read_entry(&initrd_addr, FW_CFG_INITRD_ADDR, 4,
+ fw_cfg_version);
+ bios_cfg_read_entry(initrd_addr, FW_CFG_INITRD_DATA, initrd_size,
+ fw_cfg_version);
+
+ ramdisk_mod.paddr = (uintptr_t)initrd_addr;
+ ramdisk_mod.size = initrd_size;
+
+ /* The first module is always ramdisk. */
+ start_info.modlist_paddr = (uintptr_t)&ramdisk_mod;
+ start_info.nr_modules = 1;
+ }
+
bios_cfg_read_entry(&kernel_entry, FW_CFG_KERNEL_ENTRY, 4,
fw_cfg_version);
asm volatile("jmp *%1" : : "b"(&start_info), "c"(kernel_entry));
diff --git a/pc-bios/pvh.bin b/pc-bios/pvh.bin