| Message ID | 20230801020206.1957986-4-zhaotianrui@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | selftests: kvm: Add LoongArch support | expand |
On Tue, Aug 01, 2023, Tianrui Zhao wrote: > Add ucall tests for LoongArch KVM, it means that VM use hypercall s/tests/support > to return to userspace and handle the mmio exception. > > Based-on: <20230720062813.4126751-1-zhaotianrui@loongson.cn> > Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> > --- > .../selftests/kvm/lib/loongarch/ucall.c | 44 +++++++++++++++++++ > 1 file changed, 44 insertions(+) > create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c > > diff --git a/tools/testing/selftests/kvm/lib/loongarch/ucall.c b/tools/testing/selftests/kvm/lib/loongarch/ucall.c > new file mode 100644 > index 000000000000..b32f7c7f6548 > --- /dev/null > +++ b/tools/testing/selftests/kvm/lib/loongarch/ucall.c > @@ -0,0 +1,44 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * ucall support. A ucall is a "hypercall to userspace". > + * > + */ > +#include "kvm_util.h" > + > +/* > + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each > + * VM), it must not be accessed from host code. > + */ > +static vm_vaddr_t *ucall_exit_mmio_addr; > + > +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) > +{ > + vm_vaddr_t mmio_gva = vm_vaddr_unused_gap(vm, vm->page_size, KVM_UTIL_MIN_VADDR); > + > + virt_map(vm, mmio_gva, mmio_gpa, 1); > + > + vm->ucall_mmio_addr = mmio_gpa; > + > + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gva); > +} > + > +void ucall_arch_do_ucall(vm_vaddr_t uc) > +{ > + Extra newline. > + WRITE_ONCE(*ucall_exit_mmio_addr, uc); > +} > + > +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) > +{ > + struct kvm_run *run = vcpu->run; > + > + if (run->exit_reason == KVM_EXIT_MMIO && > + run->mmio.phys_addr == vcpu->vm->ucall_mmio_addr) { > + TEST_ASSERT(run->mmio.is_write && run->mmio.len == sizeof(uint64_t), > + "Unexpected ucall exit mmio address access"); > + > + return (void *)(*((uint64_t *)run->mmio.data)); > + } > + > + return NULL; > +} > -- > 2.39.1 >
在 2023/8/3 上午2:08, Sean Christopherson 写道: > On Tue, Aug 01, 2023, Tianrui Zhao wrote: >> Add ucall tests for LoongArch KVM, it means that VM use hypercall > s/tests/support Thanks, I will fix this comment. > >> to return to userspace and handle the mmio exception. >> >> Based-on: <20230720062813.4126751-1-zhaotianrui@loongson.cn> >> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> >> --- >> .../selftests/kvm/lib/loongarch/ucall.c | 44 +++++++++++++++++++ >> 1 file changed, 44 insertions(+) >> create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c >> >> diff --git a/tools/testing/selftests/kvm/lib/loongarch/ucall.c b/tools/testing/selftests/kvm/lib/loongarch/ucall.c >> new file mode 100644 >> index 000000000000..b32f7c7f6548 >> --- /dev/null >> +++ b/tools/testing/selftests/kvm/lib/loongarch/ucall.c >> @@ -0,0 +1,44 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* >> + * ucall support. A ucall is a "hypercall to userspace". >> + * >> + */ >> +#include "kvm_util.h" >> + >> +/* >> + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each >> + * VM), it must not be accessed from host code. >> + */ >> +static vm_vaddr_t *ucall_exit_mmio_addr; >> + >> +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) >> +{ >> + vm_vaddr_t mmio_gva = vm_vaddr_unused_gap(vm, vm->page_size, KVM_UTIL_MIN_VADDR); >> + >> + virt_map(vm, mmio_gva, mmio_gpa, 1); >> + >> + vm->ucall_mmio_addr = mmio_gpa; >> + >> + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gva); >> +} >> + >> +void ucall_arch_do_ucall(vm_vaddr_t uc) >> +{ >> + > Extra newline. Thanks, I will remove this line. Thanks Tianrui Zhao > >> + WRITE_ONCE(*ucall_exit_mmio_addr, uc); >> +} >> + >> +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) >> +{ >> + struct kvm_run *run = vcpu->run; >> + >> + if (run->exit_reason == KVM_EXIT_MMIO && >> + run->mmio.phys_addr == vcpu->vm->ucall_mmio_addr) { >> + TEST_ASSERT(run->mmio.is_write && run->mmio.len == sizeof(uint64_t), >> + "Unexpected ucall exit mmio address access"); >> + >> + return (void *)(*((uint64_t *)run->mmio.data)); >> + } >> + >> + return NULL; >> +} >> -- >> 2.39.1 >>
diff --git a/tools/testing/selftests/kvm/lib/loongarch/ucall.c b/tools/testing/selftests/kvm/lib/loongarch/ucall.c new file mode 100644 index 000000000000..b32f7c7f6548 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/loongarch/ucall.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ucall support. A ucall is a "hypercall to userspace". + * + */ +#include "kvm_util.h" + +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each + * VM), it must not be accessed from host code. + */ +static vm_vaddr_t *ucall_exit_mmio_addr; + +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) +{ + vm_vaddr_t mmio_gva = vm_vaddr_unused_gap(vm, vm->page_size, KVM_UTIL_MIN_VADDR); + + virt_map(vm, mmio_gva, mmio_gpa, 1); + + vm->ucall_mmio_addr = mmio_gpa; + + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gva); +} + +void ucall_arch_do_ucall(vm_vaddr_t uc) +{ + + WRITE_ONCE(*ucall_exit_mmio_addr, uc); +} + +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) +{ + struct kvm_run *run = vcpu->run; + + if (run->exit_reason == KVM_EXIT_MMIO && + run->mmio.phys_addr == vcpu->vm->ucall_mmio_addr) { + TEST_ASSERT(run->mmio.is_write && run->mmio.len == sizeof(uint64_t), + "Unexpected ucall exit mmio address access"); + + return (void *)(*((uint64_t *)run->mmio.data)); + } + + return NULL; +}
Add ucall tests for LoongArch KVM, it means that VM use hypercall to return to userspace and handle the mmio exception. Based-on: <20230720062813.4126751-1-zhaotianrui@loongson.cn> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> --- .../selftests/kvm/lib/loongarch/ucall.c | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c