18280edafe
For para-virtualized guests running under KVM or other equivalent hypervisor. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com> Cc: linux-mips@linux-mips.org Cc: James Hogan <james.hogan@imgtec.com> Cc: kvm@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
41 lines
851 B
C
41 lines
851 B
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2013 Cavium, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/virtio_console.h>
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#include <linux/kvm_para.h>
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/*
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* Emit one character to the boot console.
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*/
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int prom_putchar(char c)
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{
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kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, 0 /* port 0 */,
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(unsigned long)&c, 1 /* len == 1 */);
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return 1;
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}
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#ifdef CONFIG_VIRTIO_CONSOLE
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static int paravirt_put_chars(u32 vtermno, const char *buf, int count)
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{
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kvm_hypercall3(KVM_HC_MIPS_CONSOLE_OUTPUT, vtermno,
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(unsigned long)buf, count);
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return count;
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}
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static int __init paravirt_cons_init(void)
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{
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virtio_cons_early_init(paravirt_put_chars);
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return 0;
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}
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core_initcall(paravirt_cons_init);
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#endif
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