haraldwolff/qemu-patch-raspberry4
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pc: remove bochs bios debug ports

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Prehistoric leftover, zap it.  We poweroff via acpi these days.

And having a port (0x501,0x502) where any random guest write will make
qemu exit -- with no way to turn it off -- is a bad joke anyway.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-12-11 09:59:55 +01:00
parent ee0cc5415e
commit 9ee59f341f
1 changed files with 0 additions and 41 deletions
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41
hw/pc.c
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@ -524,34 +524,6 @@ static void handle_a20_line_change(void *opaque, int irq, int level)
cpu_x86_set_a20(cpu, level);
}
/***********************************************************/
/* Bochs BIOS debug ports */
static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
{
static const char shutdown_str[8] = "Shutdown";
static int shutdown_index = 0;
switch(addr) {
case 0x8900:
/* same as Bochs power off */
if (val == shutdown_str[shutdown_index]) {
shutdown_index++;
if (shutdown_index == 8) {
shutdown_index = 0;
qemu_system_shutdown_request();
}
} else {
shutdown_index = 0;
}
break;
case 0x501:
case 0x502:
exit((val << 1) | 1);
}
}
int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
{
int index = le32_to_cpu(e820_table.count);
@ -569,14 +541,6 @@ int e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
return index;
}
static const MemoryRegionPortio bochs_bios_portio_list[] = {
{ 0x500, 1, 1, .write = bochs_bios_write, }, /* 0x500 */
{ 0x501, 1, 1, .write = bochs_bios_write, }, /* 0x501 */
{ 0x501, 2, 2, .write = bochs_bios_write, }, /* 0x501 */
{ 0x8900, 1, 1, .write = bochs_bios_write, }, /* 0x8900 */
PORTIO_END_OF_LIST(),
};
static void *bochs_bios_init(void)
{
void *fw_cfg;
@ -584,11 +548,6 @@ static void *bochs_bios_init(void)
size_t smbios_len;
uint64_t *numa_fw_cfg;
int i, j;
PortioList *bochs_bios_port_list = g_new(PortioList, 1);
portio_list_init(bochs_bios_port_list, bochs_bios_portio_list,
NULL, "bochs-bios");
portio_list_add(bochs_bios_port_list, get_system_io(), 0x0);
fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);