| Message ID | 20220825232522.3997340-7-seanjc@google.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | KVM: selftests: Implement ucall "pool" (for SEV) | expand |
On Thu, Aug 25, 2022 at 11:25:21PM +0000, Sean Christopherson wrote: > Drop ucall_uninit() and ucall_arch_uninit() now that ARM doesn't modify > the host's copy of ucall_exit_mmio_addr, i.e. now that there's no need to > reset the pointer before potentially creating a new VM. The few calls to > ucall_uninit() are all immediately followed by kvm_vm_free(), and that is > likely always going to hold true, i.e. it's extremely unlikely a test > will want to effectively disable ucall in the middle of a test. > > Signed-off-by: Sean Christopherson <seanjc@google.com> > --- > tools/testing/selftests/kvm/dirty_log_test.c | 1 - > tools/testing/selftests/kvm/include/ucall_common.h | 6 ------ > tools/testing/selftests/kvm/kvm_page_table_test.c | 1 - > tools/testing/selftests/kvm/lib/aarch64/ucall.c | 14 ++------------ > tools/testing/selftests/kvm/lib/perf_test_util.c | 1 - > tools/testing/selftests/kvm/lib/riscv/ucall.c | 4 ---- > tools/testing/selftests/kvm/lib/s390x/ucall.c | 4 ---- > tools/testing/selftests/kvm/lib/x86_64/ucall.c | 4 ---- > 8 files changed, 2 insertions(+), 33 deletions(-) > Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 583b46250d07..d418fef1653b 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -809,7 +809,6 @@ static void run_test(enum vm_guest_mode mode, void *arg) free(bmap); free(host_bmap_track); - ucall_uninit(vm); kvm_vm_free(vm); } diff --git a/tools/testing/selftests/kvm/include/ucall_common.h b/tools/testing/selftests/kvm/include/ucall_common.h index 8077a6d8b1ba..2662a4352a8c 100644 --- a/tools/testing/selftests/kvm/include/ucall_common.h +++ b/tools/testing/selftests/kvm/include/ucall_common.h @@ -25,7 +25,6 @@ struct ucall { }; void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa); -void ucall_arch_uninit(struct kvm_vm *vm); void ucall_arch_do_ucall(vm_vaddr_t uc); void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu); @@ -37,11 +36,6 @@ static inline void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) ucall_arch_init(vm, mmio_gpa); } -static inline void ucall_uninit(struct kvm_vm *vm) -{ - ucall_arch_uninit(vm); -} - #define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \ ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4) #define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage) diff --git a/tools/testing/selftests/kvm/kvm_page_table_test.c b/tools/testing/selftests/kvm/kvm_page_table_test.c index 20533c48ba3d..d77b1f634f29 100644 --- a/tools/testing/selftests/kvm/kvm_page_table_test.c +++ b/tools/testing/selftests/kvm/kvm_page_table_test.c @@ -416,7 +416,6 @@ static void run_test(enum vm_guest_mode mode, void *arg) TEST_ASSERT(ret == 0, "Error in sem_destroy"); free(vcpu_threads); - ucall_uninit(vm); kvm_vm_free(vm); } diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c index 1c38bd260f90..21d73afcb14f 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c @@ -12,23 +12,13 @@ */ static vm_vaddr_t *ucall_exit_mmio_addr; -static void ucall_set_mmio_addr(struct kvm_vm *vm, vm_paddr_t mmio_gpa) -{ - vm->ucall_mmio_addr = mmio_gpa; - - write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gpa); -} - void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) { virt_pg_map(vm, mmio_gpa, mmio_gpa); - ucall_set_mmio_addr(vm, mmio_gpa); -} + vm->ucall_mmio_addr = mmio_gpa; -void ucall_arch_uninit(struct kvm_vm *vm) -{ - ucall_set_mmio_addr(vm, (vm_paddr_t)NULL); + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gpa); } void ucall_arch_do_ucall(vm_vaddr_t uc) diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c index 5161fa68cdf3..78e5be2c7f1a 100644 --- a/tools/testing/selftests/kvm/lib/perf_test_util.c +++ b/tools/testing/selftests/kvm/lib/perf_test_util.c @@ -217,7 +217,6 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus, void perf_test_destroy_vm(struct kvm_vm *vm) { - ucall_uninit(vm); kvm_vm_free(vm); } diff --git a/tools/testing/selftests/kvm/lib/riscv/ucall.c b/tools/testing/selftests/kvm/lib/riscv/ucall.c index c58ecb8a0981..78acdb084ab0 100644 --- a/tools/testing/selftests/kvm/lib/riscv/ucall.c +++ b/tools/testing/selftests/kvm/lib/riscv/ucall.c @@ -14,10 +14,6 @@ void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) { } -void ucall_arch_uninit(struct kvm_vm *vm) -{ -} - struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4, diff --git a/tools/testing/selftests/kvm/lib/s390x/ucall.c b/tools/testing/selftests/kvm/lib/s390x/ucall.c index 208f0f04299b..cbee520a26f2 100644 --- a/tools/testing/selftests/kvm/lib/s390x/ucall.c +++ b/tools/testing/selftests/kvm/lib/s390x/ucall.c @@ -10,10 +10,6 @@ void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) { } -void ucall_arch_uninit(struct kvm_vm *vm) -{ -} - void ucall_arch_do_ucall(vm_vaddr_t uc) { /* Exit via DIAGNOSE 0x501 (normally used for breakpoints) */ diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c index 016a0487cf72..eb8bf55b359a 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c +++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c @@ -12,10 +12,6 @@ void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) { } -void ucall_arch_uninit(struct kvm_vm *vm) -{ -} - void ucall_arch_do_ucall(vm_vaddr_t uc) { asm volatile("in %[port], %%al"
Drop ucall_uninit() and ucall_arch_uninit() now that ARM doesn't modify the host's copy of ucall_exit_mmio_addr, i.e. now that there's no need to reset the pointer before potentially creating a new VM. The few calls to ucall_uninit() are all immediately followed by kvm_vm_free(), and that is likely always going to hold true, i.e. it's extremely unlikely a test will want to effectively disable ucall in the middle of a test. Signed-off-by: Sean Christopherson <seanjc@google.com> --- tools/testing/selftests/kvm/dirty_log_test.c | 1 - tools/testing/selftests/kvm/include/ucall_common.h | 6 ------ tools/testing/selftests/kvm/kvm_page_table_test.c | 1 - tools/testing/selftests/kvm/lib/aarch64/ucall.c | 14 ++------------ tools/testing/selftests/kvm/lib/perf_test_util.c | 1 - tools/testing/selftests/kvm/lib/riscv/ucall.c | 4 ---- tools/testing/selftests/kvm/lib/s390x/ucall.c | 4 ---- tools/testing/selftests/kvm/lib/x86_64/ucall.c | 4 ---- 8 files changed, 2 insertions(+), 33 deletions(-)