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kvm: selftests: introduce ucall

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Rework the guest exit to userspace code to generalize the concept
into what it is, a "hypercall to userspace", and provide two
implementations of it: the PortIO version currently used, but only
useable by x86, and an MMIO version that other architectures (except
s390) can use.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrew Jones
2018-09-18 19:54:25 +02:00
committed by Paolo Bonzini
parent 6c930268bc
commit 14c47b7530
10 changed files with 218 additions and 81 deletions
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15
tools/testing/selftests/kvm/lib/kvm_util.c
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@@ -133,6 +133,7 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
case VM_MODE_FLAT48PG:
vm->page_size = 0x1000;
vm->page_shift = 12;
vm->va_bits = 48;
/* Limit to 48-bit canonical virtual addresses. */
vm->vpages_valid = sparsebit_alloc();
@@ -1669,17 +1670,3 @@ void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva)
{
return addr_gpa2hva(vm, addr_gva2gpa(vm, gva));
}
void guest_args_read(struct kvm_vm *vm, uint32_t vcpu_id,
struct guest_args *args)
{
struct kvm_run *run = vcpu_state(vm, vcpu_id);
struct kvm_regs regs;
memset(&regs, 0, sizeof(regs));
vcpu_regs_get(vm, vcpu_id, &regs);
args->port = run->io.port;
args->arg0 = regs.rdi;
args->arg1 = regs.rsi;
}