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x86_64/devices: acpi: Add support for ACPI shutdown & reboot

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Add an I/O port "device" to handle requests from the kernel to shutdown
or trigger a reboot, borrowing an I/O used for ACPI on the Q35 platform.
The details of this I/O port are included in the FADT
(SLEEP_STATUS_REG/SLEEP_CONTROL_REG/RESET_REG) with the details of the
value to write in the FADT for reset (RESET_VALUE) and in the DSDT for
shutdown (S5 -> 0x05)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2019-08-29 14:58:25 +01:00
committed by Samuel Ortiz
parent ae66a44d26
commit 5a187ee2c2
4 changed files with 89 additions and 4 deletions
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27
arch/src/x86_64/acpi.rs
View File

@@ -2,7 +2,10 @@
//
// SPDX-License-Identifier: Apache-2.0
//
use acpi_tables::{rsdp::RSDP, sdt::SDT};
use acpi_tables::{
rsdp::RSDP,
sdt::{GenericAddress, SDT},
};
use vm_memory::{GuestAddress, GuestMemoryMmap};
use vm_memory::{Address, ByteValued, Bytes};
@@ -169,12 +172,21 @@ pub fn create_dsdt_table(serial_enabled: bool) -> SDT {
0x00, 0x47, 0x01, 0xF8, 0x03, 0xF8, 0x03, 0x00, 0x08, 0x79, 0x00,
];
/*
Name (\_S5, Package (0x01) // _S5_: S5 System State
{
0x05
})
*/
let s5_sleep_data = [0x08u8, 0x5F, 0x53, 0x35, 0x5F, 0x12, 0x04, 0x01, 0x0A, 0x05];
// DSDT
let mut dsdt = SDT::new(*b"DSDT", 36, 6, *b"CLOUDH", *b"CHDSDT ", 1);
dsdt.append(pci_dsdt_data);
if serial_enabled {
dsdt.append(com1_dsdt_data);
}
dsdt.append(s5_sleep_data);
dsdt
}
@@ -198,15 +210,22 @@ pub fn create_acpi_tables(
// Revision 6 of the ACPI FADT table is 276 bytes long
let mut facp = SDT::new(*b"FACP", 276, 6, *b"CLOUDH", *b"CHFACP ", 1);
let fadt_flags: u32 = 1 << 20; // HW_REDUCED_ACPI
// HW_REDUCED_ACPI and RESET_REG_SUP
let fadt_flags: u32 = 1 << 20 | 1 << 10;
facp.write(112, fadt_flags);
// TODO: RESET_REG/RESET_VALUE @ offset 116/128
// RESET_REG
facp.write(116, GenericAddress::io_port_address(0x3c0));
// RESET_VALUE
facp.write(128, 1u8);
facp.write(131, 3u8); // FADT minor version
facp.write(140, dsdt_offset.0); // X_DSDT
// TODO: SLEEP_CONTROL_REG/SLEEP_STATUS_REG @ offset 244/256
// SLEEP_CONTROL_REG
facp.write(244, GenericAddress::io_port_address(0x3c0));
// SLEEP_STATUS_REG
facp.write(256, GenericAddress::io_port_address(0x3c0));
facp.write(268, b"CLOUDHYP"); // Hypervisor Vendor Identity