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KVM: Add host hypercall support for vmx

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Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Ingo Molnar 2007-02-19 14:37:47 +02:00 committed by Avi Kivity
parent 102d8325a1
commit c21415e843
2 changed files with 33 additions and 0 deletions
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15
drivers/kvm/vmx.c
View file

@ -1657,6 +1657,20 @@ static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return 0;
}
static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
kvm_run->exit_reason = KVM_EXIT_DEBUG;
printk(KERN_DEBUG "got vmcall at RIP %08lx\n", vmcs_readl(GUEST_RIP));
printk(KERN_DEBUG "vmcall params: %08lx, %08lx, %08lx, %08lx\n",
vcpu->regs[VCPU_REGS_RAX],
vcpu->regs[VCPU_REGS_RCX],
vcpu->regs[VCPU_REGS_RDX],
vcpu->regs[VCPU_REGS_RBP]);
vcpu->regs[VCPU_REGS_RAX] = 0;
vmcs_writel(GUEST_RIP, vmcs_readl(GUEST_RIP)+3);
return 1;
}
/*
* The exit handlers return 1 if the exit was handled fully and guest execution
* may resume. Otherwise they set the kvm_run parameter to indicate what needs
@ -1675,6 +1689,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
[EXIT_REASON_MSR_WRITE] = handle_wrmsr,
[EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
[EXIT_REASON_HLT] = handle_halt,
[EXIT_REASON_VMCALL] = handle_vmcall,
};
static const int kvm_vmx_max_exit_handlers =

18
include/linux/kvm_para.h
View file

@ -52,4 +52,22 @@ struct kvm_vcpu_para_state {
#define KVM_EINVAL 1
/*
* Hypercall calling convention:
*
* Each hypercall may have 0-6 parameters.
*
* 64-bit hypercall index is in RAX, goes from 0 to __NR_hypercalls-1
*
* 64-bit parameters 1-6 are in the standard gcc x86_64 calling convention
* order: RDI, RSI, RDX, RCX, R8, R9.
*
* 32-bit index is EBX, parameters are: EAX, ECX, EDX, ESI, EDI, EBP.
* (the first 3 are according to the gcc regparm calling convention)
*
* No registers are clobbered by the hypercall, except that the
* return value is in RAX.
*/
#define __NR_hypercalls 0
#endif