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hv: fix out-of-date comments related to pre-launched VMs rebooting

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Like post-launched VMs, for pre-launched VMs, the ACPI reset register
is also fixed at 0xcf9 and the reset value is 0xE, so pre-launched VMs
now also use ACPI reset register for rebooting.

Tracked-On: #5411
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
This commit is contained in:
dongshen 2020-10-22 15:42:00 -07:00 committed by wenlingz
parent 9735718e1f
commit 8f79ceefbd
1 changed files with 4 additions and 5 deletions
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3
hypervisor/arch/x86/guest/vm_reset.c
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@ -211,12 +211,11 @@ void register_reset_port_handler(struct acrn_vm *vm)
io_range.base = 0x64U; io_range.base = 0x64U;
register_pio_emulation_handler(vm, KB_PIO_IDX, &io_range, handle_kb_read, handle_kb_write); register_pio_emulation_handler(vm, KB_PIO_IDX, &io_range, handle_kb_read, handle_kb_write);
/* ACPI reset register is fixed at 0xcf9 for post-launched and pre-launched VMs */
io_range.base = 0xcf9U; io_range.base = 0xcf9U;
register_pio_emulation_handler(vm, CF9_PIO_IDX, &io_range, handle_reset_reg_read, handle_cf9_write); register_pio_emulation_handler(vm, CF9_PIO_IDX, &io_range, handle_reset_reg_read, handle_cf9_write);
/* /*
* - pre-launched VMs don't support ACPI;
* - ACPI reset register is fixed at 0xcf9 for post-launched VMs;
* - here is taking care of SOS only: * - here is taking care of SOS only:
* Don't support MMIO or PCI based reset register for now. * Don't support MMIO or PCI based reset register for now.
* ACPI Spec: Register_Bit_Width must be 8 and Register_Bit_Offset must be 0. * ACPI Spec: Register_Bit_Width must be 8 and Register_Bit_Offset must be 0.