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-rw-r--r--tools/testing/selftests/kvm/include/ucall_common.h8
-rw-r--r--tools/testing/selftests/kvm/lib/aarch64/ucall.c14
-rw-r--r--tools/testing/selftests/kvm/lib/riscv/ucall.c19
-rw-r--r--tools/testing/selftests/kvm/lib/s390x/ucall.c16
-rw-r--r--tools/testing/selftests/kvm/lib/ucall_common.c19
-rw-r--r--tools/testing/selftests/kvm/lib/x86_64/ucall.c16
6 files changed, 33 insertions, 59 deletions
diff --git a/tools/testing/selftests/kvm/include/ucall_common.h b/tools/testing/selftests/kvm/include/ucall_common.h
index 5a85f5318bbe..63bfc60be995 100644
--- a/tools/testing/selftests/kvm/include/ucall_common.h
+++ b/tools/testing/selftests/kvm/include/ucall_common.h
@@ -27,9 +27,10 @@ struct ucall {
void ucall_arch_init(struct kvm_vm *vm, void *arg);
void ucall_arch_uninit(struct kvm_vm *vm);
void ucall_arch_do_ucall(vm_vaddr_t uc);
-uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu);
void ucall(uint64_t cmd, int nargs, ...);
+uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
static inline void ucall_init(struct kvm_vm *vm, void *arg)
{
@@ -41,11 +42,6 @@ static inline void ucall_uninit(struct kvm_vm *vm)
ucall_arch_uninit(vm);
}
-static inline uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
-{
- return ucall_arch_get_ucall(vcpu, uc);
-}
-
#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/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
index 3630708c32d6..f214f5cc53d3 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
@@ -75,13 +75,9 @@ void ucall_arch_do_ucall(vm_vaddr_t uc)
WRITE_ONCE(*ucall_exit_mmio_addr, uc);
}
-uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
- struct ucall ucall = {};
-
- if (uc)
- memset(uc, 0, sizeof(*uc));
if (run->exit_reason == KVM_EXIT_MMIO &&
run->mmio.phys_addr == (uint64_t)ucall_exit_mmio_addr) {
@@ -90,12 +86,8 @@ uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
TEST_ASSERT(run->mmio.is_write && run->mmio.len == 8,
"Unexpected ucall exit mmio address access");
memcpy(&gva, run->mmio.data, sizeof(gva));
- memcpy(&ucall, addr_gva2hva(vcpu->vm, gva), sizeof(ucall));
-
- vcpu_run_complete_io(vcpu);
- if (uc)
- memcpy(uc, &ucall, sizeof(ucall));
+ return addr_gva2hva(vcpu->vm, gva);
}
- return ucall.cmd;
+ return NULL;
}
diff --git a/tools/testing/selftests/kvm/lib/riscv/ucall.c b/tools/testing/selftests/kvm/lib/riscv/ucall.c
index b1598f418c1f..37e091d4366e 100644
--- a/tools/testing/selftests/kvm/lib/riscv/ucall.c
+++ b/tools/testing/selftests/kvm/lib/riscv/ucall.c
@@ -51,27 +51,15 @@ void ucall_arch_do_ucall(vm_vaddr_t uc)
uc, 0, 0, 0, 0, 0);
}
-uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
- struct ucall ucall = {};
-
- if (uc)
- memset(uc, 0, sizeof(*uc));
if (run->exit_reason == KVM_EXIT_RISCV_SBI &&
run->riscv_sbi.extension_id == KVM_RISCV_SELFTESTS_SBI_EXT) {
switch (run->riscv_sbi.function_id) {
case KVM_RISCV_SELFTESTS_SBI_UCALL:
- memcpy(&ucall,
- addr_gva2hva(vcpu->vm, run->riscv_sbi.args[0]),
- sizeof(ucall));
-
- vcpu_run_complete_io(vcpu);
- if (uc)
- memcpy(uc, &ucall, sizeof(ucall));
-
- break;
+ return addr_gva2hva(vcpu->vm, run->riscv_sbi.args[0]);
case KVM_RISCV_SELFTESTS_SBI_UNEXP:
vcpu_dump(stderr, vcpu, 2);
TEST_ASSERT(0, "Unexpected trap taken by guest");
@@ -80,6 +68,5 @@ uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
break;
}
}
-
- return ucall.cmd;
+ return NULL;
}
diff --git a/tools/testing/selftests/kvm/lib/s390x/ucall.c b/tools/testing/selftests/kvm/lib/s390x/ucall.c
index 114cb4af295f..0f695a031d35 100644
--- a/tools/testing/selftests/kvm/lib/s390x/ucall.c
+++ b/tools/testing/selftests/kvm/lib/s390x/ucall.c
@@ -20,13 +20,9 @@ void ucall_arch_do_ucall(vm_vaddr_t uc)
asm volatile ("diag 0,%0,0x501" : : "a"(uc) : "memory");
}
-uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
- struct ucall ucall = {};
-
- if (uc)
- memset(uc, 0, sizeof(*uc));
if (run->exit_reason == KVM_EXIT_S390_SIEIC &&
run->s390_sieic.icptcode == 4 &&
@@ -34,13 +30,7 @@ uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
(run->s390_sieic.ipb >> 16) == 0x501) {
int reg = run->s390_sieic.ipa & 0xf;
- memcpy(&ucall, addr_gva2hva(vcpu->vm, run->s.regs.gprs[reg]),
- sizeof(ucall));
-
- vcpu_run_complete_io(vcpu);
- if (uc)
- memcpy(uc, &ucall, sizeof(ucall));
+ return addr_gva2hva(vcpu->vm, run->s.regs.gprs[reg]);
}
-
- return ucall.cmd;
+ return NULL;
}
diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
index 2395c7f1d543..ced480860746 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -18,3 +18,22 @@ void ucall(uint64_t cmd, int nargs, ...)
ucall_arch_do_ucall((vm_vaddr_t)&uc);
}
+
+uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+{
+ struct ucall ucall;
+ void *addr;
+
+ if (!uc)
+ uc = &ucall;
+
+ addr = ucall_arch_get_ucall(vcpu);
+ if (addr) {
+ memcpy(uc, addr, sizeof(*uc));
+ vcpu_run_complete_io(vcpu);
+ } else {
+ memset(uc, 0, sizeof(*uc));
+ }
+
+ return uc->cmd;
+}
diff --git a/tools/testing/selftests/kvm/lib/x86_64/ucall.c b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
index 9f532dba1003..ead9946399ab 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/ucall.c
@@ -22,25 +22,15 @@ void ucall_arch_do_ucall(vm_vaddr_t uc)
: : [port] "d" (UCALL_PIO_PORT), "D" (uc) : "rax", "memory");
}
-uint64_t ucall_arch_get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc)
+void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
- struct ucall ucall = {};
-
- if (uc)
- memset(uc, 0, sizeof(*uc));
if (run->exit_reason == KVM_EXIT_IO && run->io.port == UCALL_PIO_PORT) {
struct kvm_regs regs;
vcpu_regs_get(vcpu, &regs);
- memcpy(&ucall, addr_gva2hva(vcpu->vm, (vm_vaddr_t)regs.rdi),
- sizeof(ucall));
-
- vcpu_run_complete_io(vcpu);
- if (uc)
- memcpy(uc, &ucall, sizeof(ucall));
+ return addr_gva2hva(vcpu->vm, regs.rdi);
}
-
- return ucall.cmd;
+ return NULL;
}
generated by cgit (git 2.34.1) at 2025-03-19 00:45:29 +0000