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kvm: Add some more ioport emulation

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This patch adds some more ioport emulation code so that I can boot a Linux
kernel cleanly with "--ioport-debug" command line option enabled.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
This commit is contained in:
Pekka Enberg
2015-06-01 16:39:40 +01:00
committed by Will Deacon
parent 15c2b0a0a4
commit 25af6674f2
2 changed files with 35 additions and 2 deletions
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early_printk.c
+8 -2
View File
@@ -25,8 +25,14 @@ static bool early_serial_txr_out(struct kvm *self, uint16_t port, void *data, in
return true;
}
static struct ioport_operations early_serial_txr_ops = {
static bool early_serial_rxr_in(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
{
return true;
}
static struct ioport_operations early_serial_txr_rxr_ops = {
.io_out = early_serial_txr_out,
.io_in = early_serial_rxr_in,
};
static bool early_serial_lsr_in(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
@@ -44,6 +50,6 @@ static struct ioport_operations early_serial_lsr_ops = {
void early_printk__init(void)
{
ioport__register(early_serial_base + TXR, &early_serial_txr_ops);
ioport__register(early_serial_base + TXR, &early_serial_txr_rxr_ops);
ioport__register(early_serial_base + LSR, &early_serial_lsr_ops);
}
ioport.c
+27
View File
@@ -74,6 +74,7 @@ static struct ioport_operations *ioport_ops[USHRT_MAX] = {
/* PORT 0060-006F - KEYBOARD CONTROLLER 804x (8041, 8042) (or PPI (8255) on PC,XT) */
[0x0060] = &dummy_read_write_ioport_ops,
[0x0061] = &dummy_read_write_ioport_ops,
[0x0064] = &dummy_read_write_ioport_ops,
/* PORT 0070-007F - CMOS RAM/RTC (REAL TIME CLOCK) */
[0x0070] = &cmos_ram_rtc_ops,
@@ -94,15 +95,41 @@ static struct ioport_operations *ioport_ops[USHRT_MAX] = {
[0x00F0] = &dummy_write_only_ioport_ops,
[0x00F1] = &dummy_write_only_ioport_ops,
/* PORT 02E8-02EF - serial port, same as 02F8, 03E8 and 03F8 (COM4) */
[0x02E8] = &dummy_read_write_ioport_ops,
[0x02E9] = &dummy_read_write_ioport_ops,
[0x02EA] = &dummy_read_write_ioport_ops,
[0x02EB] = &dummy_read_write_ioport_ops,
[0x02EC] = &dummy_read_write_ioport_ops,
[0x02EE] = &dummy_read_write_ioport_ops,
[0x02EF] = &dummy_read_write_ioport_ops,
/* PORT 02F8-02FF - serial port, same as 02E8, 03E8 and 03F8 (COM2) */
[0x02F8] = &dummy_read_write_ioport_ops,
[0x02F9] = &dummy_read_write_ioport_ops,
[0x02FA] = &dummy_read_write_ioport_ops,
[0x02FB] = &dummy_read_write_ioport_ops,
[0x02FC] = &dummy_read_write_ioport_ops,
[0x02FF] = &dummy_read_write_ioport_ops,
/* PORT 03D4-03D5 - COLOR VIDEO - CRT CONTROL REGISTERS */
[0x03D4] = &dummy_read_write_ioport_ops,
[0x03D5] = &dummy_write_only_ioport_ops,
/* PORT 03E8-03EF - serial port, same as 02E8, 02F8 and 03F8 (COM3) */
[0x03E8] = &dummy_read_write_ioport_ops,
[0x03E9] = &dummy_read_write_ioport_ops,
[0x03EA] = &dummy_read_write_ioport_ops,
[0x03EB] = &dummy_read_write_ioport_ops,
[0x03EC] = &dummy_read_write_ioport_ops,
[0x03EF] = &dummy_read_write_ioport_ops,
/* PORT 03F8-03FF - Serial port (8250,8250A,8251,16450,16550,16550A,etc.) COM1 */
[0x03F9] = &dummy_read_write_ioport_ops,
[0x03FA] = &dummy_read_write_ioport_ops,
[0x03FB] = &dummy_read_write_ioport_ops,
[0x03FC] = &dummy_read_write_ioport_ops,
[0x03FF] = &dummy_read_write_ioport_ops,
/* PORT 0CF8-0CFF - PCI Configuration Mechanism 1 - Configuration Registers */
[0x0CF8] = &dummy_write_only_ioport_ops,