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69fef2e685
In some scenarios (e.g., nested) where lapic-pt is enabled for a vcpu running on a pcpu hosting console timer, the hv console will be inaccessible. This patch adds the console callback to every VM-exit event so that the console can still be somewhat functional under such circumstance. Since this is VM-exit driven, the VM-exit/second can be low in certain cases (e.g., idle or running stress workload). In extreme cases where the guest panics/hangs, there will be no VM-exits at all. In most cases, the shell is laggy but functional (probably enough for debugging purpose). Tracked-On: #6312 Signed-off-by: Yifan Liu <yifan1.liu@intel.com>
46 lines
1.1 KiB
C
46 lines
1.1 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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#ifndef CONSOLE_H
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#define CONSOLE_H
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#include <vuart.h>
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#include <asm/guest/vcpu.h>
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/** Initializes the console module.
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*
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*/
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void console_init(void);
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/** Writes a given number of characters to the console.
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*
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* @param s A pointer to character array to write.
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* @param len The number of characters to write.
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*
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* @return The number of characters written or -1 if an error occurred
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* and no character was written.
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*/
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size_t console_write(const char *s, size_t len);
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/** Writes a single character to the console.
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*
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* @param ch The character to write.
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*
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* @preturn The number of characters written or -1 if an error
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* occurred before any character was written.
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*/
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void console_putc(const char *ch);
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char console_getc(void);
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void console_setup_timer(void);
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void console_vmexit_callback(struct acrn_vcpu *vcpu);
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void suspend_console(void);
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void resume_console(void);
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struct acrn_vuart *vm_console_vuart(struct acrn_vm *vm);
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#endif /* CONSOLE_H */
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