KVM: Add host hypercall support for vmx (c21415e8) · Commits · e / devices / android_kernel_teracube_2e

drivers/kvm/vmx.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -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 −0

Original line number	Diff line number	Diff line
		@@ -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