mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2026-02-21 14:43:20 +00:00
7ae20c970b
Currently, we always assign 0x3F8 as port base io address for emualted COM1 of SOS. But in some board, it use serial port which has other base io address for debugging purpose. And this serial port info is also exposed to SOS by ACPI table. In this case, SOS could access the debugging serial port because it could see the port from ACPI table and conflict with ACRN. To mitigate this issue, we could let emulated COM1 of SOS to use native debugging serial port base io port and irq info. Tracked-On: #4998 Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
118 lines
2.3 KiB
C
118 lines
2.3 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <rtl.h>
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#include <pci.h>
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#include <uart16550.h>
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#include <dbg_cmd.h>
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#include <vm_config.h>
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#define MAX_PORT 0x10000 /* port 0 - 64K */
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#define DEFAULT_UART_PORT 0x3F8
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#define MAX_CMD_LEN 64
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static const char * const cmd_list[] = {
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"uart=disabled", /* to disable uart */
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"uart=port@", /* like uart=port@0x3F8 */
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"uart=bdf@", /*like: uart=bdf@0:18.2, it is for ttyS2 */
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};
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enum IDX_CMD_DBG {
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IDX_DISABLE_UART,
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IDX_PORT_UART,
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IDX_PCI_UART,
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IDX_MAX_CMD,
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};
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static void update_sos_vm_config_uart_irq(uint64_t irq)
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{
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uint16_t vm_id;
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struct acrn_vm_config *vm_config;
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for (vm_id = 0U; vm_id < CONFIG_MAX_VM_NUM; vm_id++) {
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vm_config = get_vm_config(vm_id);
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if (vm_config->load_order == SOS_VM) {
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break;
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}
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}
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if (vm_id != CONFIG_MAX_VM_NUM) {
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vm_config->vuart[0].irq = irq & 0xFFFFU;
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}
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}
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static void update_sos_vm_config_uart_ioport(uint64_t addr)
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{
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uint16_t vm_id;
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struct acrn_vm_config *vm_config;
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for (vm_id = 0U; vm_id < CONFIG_MAX_VM_NUM; vm_id++) {
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vm_config = get_vm_config(vm_id);
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if (vm_config->load_order == SOS_VM) {
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break;
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}
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}
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if (vm_id != CONFIG_MAX_VM_NUM) {
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vm_config->vuart[0].addr.port_base = addr & 0xFFFFU;
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}
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}
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bool handle_dbg_cmd(const char *cmd, int32_t len)
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{
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int32_t i;
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bool handled = false;
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for (i = 0; i < IDX_MAX_CMD; i++) {
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int32_t tmp = strnlen_s(cmd_list[i], MAX_CMD_LEN);
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/*cmd prefix should be same with one in cmd_list */
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if (len < tmp)
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continue;
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if (strncmp(cmd_list[i], cmd, tmp) != 0)
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continue;
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if (i == IDX_DISABLE_UART) {
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/* set uart disabled*/
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uart16550_set_property(false, false, 0UL);
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} else if (i == IDX_PORT_UART) {
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char *pos, *start = (char *)cmd + tmp;
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uint64_t addr, irq;
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pos = strchr(start, ',');
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if (pos != NULL) {
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*pos = '\0';
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pos++;
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irq = strtoul_hex(pos);
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update_sos_vm_config_uart_irq(irq);
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}
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addr = strtoul_hex(start);
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if (addr > MAX_PORT) {
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addr = DEFAULT_UART_PORT;
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}
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update_sos_vm_config_uart_ioport(addr);
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uart16550_set_property(true, true, addr);
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} else if (i == IDX_PCI_UART) {
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uart16550_set_property(true, false, (uint64_t)(cmd+tmp));
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} else {
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/* No other state currently, do nothing */
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}
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}
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if (i < IDX_MAX_CMD) {
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handled = true;
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}
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return handled;
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}
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