1 // SPDX-License-Identifier: GPL-2.0
11 static bool ucall_mmio_init(struct kvm_vm *vm, vm_paddr_t gpa)  in ucall_mmio_init()  argument
13 	if (kvm_userspace_memory_region_find(vm, gpa, gpa + 1))  in ucall_mmio_init()
16 	virt_pg_map(vm, gpa, gpa);  in ucall_mmio_init()
18 	ucall_exit_mmio_addr = (vm_vaddr_t *)gpa;  in ucall_mmio_init()
26 	vm_paddr_t gpa, start, end, step, offset;  in ucall_init()  local
31 		gpa = (vm_paddr_t)arg;  in ucall_init()
32 		ret = ucall_mmio_init(vm, gpa);  in ucall_init()
33 		TEST_ASSERT(ret, "Can't set ucall mmio address to %lx", gpa);  in ucall_init()
46 	 * up from there in 1/16th allowed space sized steps.  in ucall_init()
48 	 * Note, we need to use VA-bits - 1 when calculating the allowed  in ucall_init()
53 	bits = vm->va_bits - 1;  in ucall_init()
54 	bits = min(vm->pa_bits, bits);  in ucall_init()
55 	end = 1ul << bits;  in ucall_init()
58 	for (offset = 0; offset < end - start; offset += step) {  in ucall_init()
59 		if (ucall_mmio_init(vm, start - offset))  in ucall_init()
92 	struct kvm_run *run = vcpu->run;  in get_ucall()
98 	if (run->exit_reason == KVM_EXIT_MMIO &&  in get_ucall()
99 	    run->mmio.phys_addr == (uint64_t)ucall_exit_mmio_addr) {  in get_ucall()
102 		TEST_ASSERT(run->mmio.is_write && run->mmio.len == 8,  in get_ucall()
104 		memcpy(&gva, run->mmio.data, sizeof(gva));  in get_ucall()
105 		memcpy(&ucall, addr_gva2hva(vcpu->vm, gva), sizeof(ucall));  in get_ucall()