Some operating systems such as FreeBSD and Mac OSX need the reset_register
section of the FADT filled to know which port to write to for a system reset.
What is the right way to set the reset_val and the reset addr in this case?
---
hw/i386/acpi-build.c | 5 +++++
hw/i386/acpi-defs.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index d0a5c85..21c1453 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -361,6 +361,11 @@ static void fadt_setup(AcpiFadtDescriptorRev1 *fadt,
AcpiPmInfo *pm)
(1 << ACPI_FADT_F_SLP_BUTTON) |
(1 << ACPI_FADT_F_RTC_S4));
fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_USE_PLATFORM_CLOCK);
+ fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_RESET_REG_SUP);
+ fadt->reset_val = 0xf;
+ fadt->reset_reg.address_space_id = aml_system_io;
+ fadt->reset_reg.register_bit_width = 8;
+ fadt->reset_reg.address = ICH9_RST_CNT_IOPORT;
/* APIC destination mode ("Flat Logical") has an upper limit of 8 CPUs
* For more than 8 CPUs, "Clustered Logical" mode has to be used
*/
diff --git a/hw/i386/acpi-defs.h b/hw/i386/acpi-defs.h
index c4468f8..960c833 100644
--- a/hw/i386/acpi-defs.h
+++ b/hw/i386/acpi-defs.h
@@ -132,6 +132,8 @@ struct AcpiFadtDescriptorRev1
uint8_t reserved4a; /* Reserved */
uint8_t reserved4b; /* Reserved */
uint32_t flags;
+ Acpi20GenericAddress reset_reg;
+ uint8_t reset_val;
} QEMU_PACKED;
typedef struct AcpiFadtDescriptorRev1 AcpiFadtDescriptorRev1;
--
2.3.4
