From: Andrey Smetanin <asmeta...@virtuozzo.com>
Guest OS uses ACPI to discover vmbus presence. Add a corresponding
entry to DSDT in case vmbus has been enabled.
Experimentally Windows guests were found to require this entry to
include two IRQ resources, so this patch adds two semi-arbitrarily
chosen ones (7 and 13). This results, in particular, in parallel port
conflicting with vmbus.
TODO: discover and use spare IRQs to avoid conflicts.
Signed-off-by: Evgeny Yakovlev <eyakov...@virtuozzo.com>
Signed-off-by: Roman Kagan <rka...@virtuozzo.com>
---
hw/i386/acpi-build.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ed78c4ed9f..6f8cd3eb41 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -46,6 +46,7 @@
#include "sysemu/tpm_backend.h"
#include "hw/timer/mc146818rtc_regs.h"
#include "sysemu/numa.h"
+#include "hw/vmbus/vmbus.h"
/* Supported chipsets: */
#include "hw/acpi/piix4.h"
@@ -1317,6 +1318,43 @@ static Aml *build_com_device_aml(uint8_t uid)
return dev;
}
+static Aml *build_vmbus_device_aml(void)
+{
+ Aml *dev;
+ Aml *method;
+ Aml *crs;
+
+ dev = aml_device("VMBS");
+ aml_append(dev, aml_name_decl("STA", aml_int(0xF)));
+ aml_append(dev, aml_name_decl("_HID", aml_string("VMBus")));
+ aml_append(dev, aml_name_decl("_UID", aml_int(0x0)));
+ aml_append(dev, aml_name_decl("_DDN", aml_string("VMBUS")));
+
+ method = aml_method("_DIS", 0, AML_NOTSERIALIZED);
+ aml_append(method, aml_store(aml_and(aml_name("STA"), aml_int(0xD), NULL),
+ aml_name("STA")));
+ aml_append(dev, method);
+
+ method = aml_method("_PS0", 0, AML_NOTSERIALIZED);
+ aml_append(method, aml_store(aml_or(aml_name("STA"), aml_int(0xF), NULL),
+ aml_name("STA")));
+ aml_append(dev, method);
+
+ method = aml_method("_STA", 0, AML_NOTSERIALIZED);
+ aml_append(method, aml_store(aml_name("STA"), aml_local(0)));
+ aml_append(method, aml_return(aml_local(0)));
+ aml_append(dev, method);
+
+ aml_append(dev, aml_name_decl("_PS3", aml_int(0x0)));
+
+ crs = aml_resource_template();
+ aml_append(crs, aml_irq_no_flags(7));
+ aml_append(crs, aml_irq_no_flags(13));
+ aml_append(dev, aml_name_decl("_CRS", crs));
+
+ return dev;
+}
+
static void build_isa_devices_aml(Aml *table)
{
ISADevice *fdc = pc_find_fdc0();
@@ -1343,6 +1381,10 @@ static void build_isa_devices_aml(Aml *table)
build_acpi_ipmi_devices(scope, BUS(obj));
}
+ if (vmbus_exists()) {
+ aml_append(scope, build_vmbus_device_aml());
+ }
+
aml_append(table, scope);
}
--
2.14.3
