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| author | Ingo Molnar <mingo@elte.hu> | 2007-02-19 14:37:47 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-03-04 11:12:40 +0200 |
| commit | c21415e84334af679630f6450ceb8929a5234fad (patch) | |
| tree | 6f9ce30c9fd97a3fc94e79e1450fda86f612b56e | |
| parent | 102d8325a1d2f266d3d0a03fdde948544e72c12d (diff) | |
| download | lwn-c21415e84334af679630f6450ceb8929a5234fad.tar.gz lwn-c21415e84334af679630f6450ceb8929a5234fad.zip | |
KVM: Add host hypercall support for vmx
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/vmx.c | 15 | ||||
| -rw-r--r-- | include/linux/kvm_para.h | 18 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 0198d400037f..ca79e594ea6e 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -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 = diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h index 74be5c1002ec..3b292565a693 100644 --- a/include/linux/kvm_para.h +++ b/include/linux/kvm_para.h @@ -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 |