reset state for load_linux

The linux loader is just an option rom like any other, just with
some special requirements. Right now, our option rom resetting
mechanism is not being applied to it. As a result, users using
-kernel will not be able to successfully reboot their machines

This patch fixes it by saving all the data we generated in
the load_linux() function, to be used later by the option rom
resetting mechanism.

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/hw/pc.c b/hw/pc.c
index c33cd75569..1b1637337d 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -471,7 +471,7 @@ static void bochs_bios_init(void)
 
 /* Generate an initial boot sector which sets state and jump to
    a specified vector */
-static void generate_bootsect(uint8_t *option_rom,
+static void generate_bootsect(target_phys_addr_t option_rom,
                               uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
 {
     uint8_t rom[512], *p, *reloc;
@@ -545,7 +545,8 @@ static void generate_bootsect(uint8_t *option_rom,
         sum += rom[i];
     rom[sizeof(rom) - 1] = -sum;
 
-    memcpy(option_rom, rom, sizeof(rom));
+    cpu_physical_memory_write_rom(option_rom, rom, sizeof(rom));
+    option_rom_setup_reset(option_rom, sizeof (rom));
 }
 
 static long get_file_size(FILE *f)
@@ -562,7 +563,7 @@ static long get_file_size(FILE *f)
     return size;
 }
 
-static void load_linux(uint8_t *option_rom,
+static void load_linux(target_phys_addr_t option_rom,
                        const char *kernel_filename,
 		       const char *initrd_filename,
 		       const char *kernel_cmdline)
@@ -713,6 +714,12 @@ static void load_linux(uint8_t *option_rom,
     memset(gpr, 0, sizeof gpr);
     gpr[4] = cmdline_addr-real_addr-16;	/* SP (-16 is paranoia) */
 
+    option_rom_setup_reset(real_addr, setup_size);
+    option_rom_setup_reset(prot_addr, kernel_size);
+    option_rom_setup_reset(cmdline_addr, cmdline_size);
+    if (initrd_filename)
+        option_rom_setup_reset(initrd_addr, initrd_size);
+
     generate_bootsect(option_rom, gpr, seg, 0);
 }
 
@@ -920,7 +927,7 @@ vga_bios_error:
         offset = 0;
         if (linux_boot) {
             option_rom_offset = qemu_ram_alloc(TARGET_PAGE_SIZE);
-            load_linux(phys_ram_base + option_rom_offset,
+            load_linux(option_rom_offset,
                        kernel_filename, initrd_filename, kernel_cmdline);
             cpu_register_physical_memory(0xd0000, TARGET_PAGE_SIZE,
                                          option_rom_offset);