7d63797815
kvm-intel module is relocated to an isolated address space with kernel, so it can't call host kernel's printk for debug purpose. In the module, we implement the printk to output debug info of vmm. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* vmm.c: vmm module interface with kvm module
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*
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* Copyright (c) 2007, Intel Corporation.
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*
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* Xiantao Zhang (xiantao.zhang@intel.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include<linux/module.h>
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#include<asm/fpswa.h>
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#include "vcpu.h"
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MODULE_AUTHOR("Intel");
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MODULE_LICENSE("GPL");
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extern char kvm_ia64_ivt;
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extern fpswa_interface_t *vmm_fpswa_interface;
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struct kvm_vmm_info vmm_info = {
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.module = THIS_MODULE,
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.vmm_entry = vmm_entry,
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.tramp_entry = vmm_trampoline,
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.vmm_ivt = (unsigned long)&kvm_ia64_ivt,
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};
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static int __init kvm_vmm_init(void)
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{
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vmm_fpswa_interface = fpswa_interface;
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/*Register vmm data to kvm side*/
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return kvm_init(&vmm_info, 1024, THIS_MODULE);
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}
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static void __exit kvm_vmm_exit(void)
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{
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kvm_exit();
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return ;
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}
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void vmm_spin_lock(spinlock_t *lock)
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{
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_vmm_raw_spin_lock(lock);
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}
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void vmm_spin_unlock(spinlock_t *lock)
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{
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_vmm_raw_spin_unlock(lock);
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}
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static void vcpu_debug_exit(struct kvm_vcpu *vcpu)
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{
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struct exit_ctl_data *p = &vcpu->arch.exit_data;
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long psr;
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local_irq_save(psr);
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p->exit_reason = EXIT_REASON_DEBUG;
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vmm_transition(vcpu);
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local_irq_restore(psr);
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}
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asmlinkage int printk(const char *fmt, ...)
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{
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struct kvm_vcpu *vcpu = current_vcpu;
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va_list args;
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int r;
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memset(vcpu->arch.log_buf, 0, VMM_LOG_LEN);
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va_start(args, fmt);
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r = vsnprintf(vcpu->arch.log_buf, VMM_LOG_LEN, fmt, args);
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va_end(args);
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vcpu_debug_exit(vcpu);
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return r;
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}
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module_init(kvm_vmm_init)
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module_exit(kvm_vmm_exit)
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