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authorPaolo Bonzini <pbonzini@redhat.com>2011-07-15 17:10:15 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2011-07-23 10:56:55 -0500
commit6141dbfe0a595076310f690ec8db84ad5be2cde5 (patch)
tree0e6797e83f99c4d488fa0ff4fe32b489cf525f18 /hw
parent5bda29da18eb5104718cad9810b625a0105cb0d2 (diff)
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report serial devices created with -device in the PIIX4 config space
Serial and parallel devices created with -device are not reported in the PIIX4 configuration space, and are hence not picked up by the DSDT. This upsets Windows, which hides them altogether from the guest. To avoid this, check at the end of machine initialization whether the corresponding I/O ports have been registered. The new function in ioport.c does this; this also requires a tweak to isa_unassign_ioport. I left the comment in piix4_pm_initfn since the registers I moved do seem to match the 82371AB datasheet. There are some quirks though. We are setting this bit: "Device 8 EIO Enable (EIO_EN_DEV8)—R/W. 1=Enable PCI access to the device 8 enabled I/O ranges to be claimed by PIIX4 and forwarded to the ISA/EIO bus. 0=Disable. The LPT_MON_EN must be set to enable the decode." but not LPT_MON_EN (bit 18 at 50h): LPT Port Enable (LPT_MON_EN)—R/W. 1=Enable accesses to parallel port address range (LPT_DEC_SEL) to generate a device 8 (parallel port) decode event. 0=Disable. We're also setting the LPT_DEC_SEL field (that's the 0x60 written to 63h) to 11, which means reserved, rather than to 01 (378h-37Fh). Likewise we're not setting SA_MON_EN, SB_MON_EN (respectively bit 14 and bit 16 at address 50h) for the serial ports. However, we're setting COMA_DEC_SEL and COMB_DEC_SEL correctly, unlike the corresponding register for the parallel port. All these fields are left as they are, since they are probably only meant to be used in the DSDT. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/acpi_piix4.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
index 350558b..03bd768 100644
--- a/hw/acpi_piix4.c
+++ b/hw/acpi_piix4.c
@@ -23,6 +23,7 @@
#include "acpi.h"
#include "sysemu.h"
#include "range.h"
+#include "ioport.h"
//#define DEBUG
@@ -63,6 +64,7 @@ typedef struct PIIX4PMState {
qemu_irq irq;
qemu_irq smi_irq;
int kvm_enabled;
+ Notifier machine_ready;
/* for pci hotplug */
ACPIGPE gpe;
@@ -311,6 +313,19 @@ static void piix4_powerdown(void *opaque, int irq, int power_failing)
acpi_pm1_evt_power_down(pm1a, tmr);
}
+static void piix4_pm_machine_ready(struct Notifier* n)
+{
+ PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
+ uint8_t *pci_conf;
+
+ pci_conf = s->dev.config;
+ pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10;
+ pci_conf[0x63] = 0x60;
+ pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) |
+ (isa_is_ioport_assigned(0x2f8) ? 0x90 : 0);
+
+}
+
static int piix4_pm_initfn(PCIDevice *dev)
{
PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
@@ -337,11 +352,6 @@ static int piix4_pm_initfn(PCIDevice *dev)
/* XXX: which specification is used ? The i82731AB has different
mappings */
- pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
- pci_conf[0x63] = 0x60;
- pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
- (serial_hds[1] != NULL ? 0x90 : 0);
-
pci_conf[0x90] = s->smb_io_base | 1;
pci_conf[0x91] = s->smb_io_base >> 8;
pci_conf[0xd2] = 0x09;
@@ -354,6 +364,8 @@ static int piix4_pm_initfn(PCIDevice *dev)
qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
pm_smbus_init(&s->dev.qdev, &s->smb);
+ s->machine_ready.notify = piix4_pm_machine_ready;
+ qemu_add_machine_init_done_notifier(&s->machine_ready);
qemu_register_reset(piix4_reset, s);
piix4_acpi_system_hot_add_init(dev->bus, s);