[PATCH v2 101/144] KVM: selftests: Return created vcpu from vm_vcpu_add_default()

Sean Christopherson
2022-06-03T00:56:17Z

Return the created 'struct kvm_vcpu' object from vm_vcpu_add_default(),
which cleans up a few tests and will eventually allow removing vcpu_get()
entirely.

Opportunistically rename @vcpuid to @vcpu_id to follow preferred kernel
style.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
.../selftests/kvm/include/aarch64/processor.h | 5 +++--
.../selftests/kvm/include/kvm_util_base.h | 10 ++++++----
.../selftests/kvm/lib/aarch64/processor.c | 20 +++++++++++--------
.../selftests/kvm/lib/riscv/processor.c | 20 +++++++++++--------
.../selftests/kvm/lib/s390x/processor.c | 18 ++++++++++-------
.../selftests/kvm/lib/x86_64/processor.c | 20 +++++++++++--------
.../kvm/x86_64/pmu_event_filter_test.c | 4 +---
.../selftests/kvm/x86_64/tsc_scaling_sync.c | 3 +--
8 files changed, 58 insertions(+), 42 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h
index 4d2d474b6874..9dad391b4fec 100644
--- a/tools/testing/selftests/kvm/include/aarch64/processor.h
+++ b/tools/testing/selftests/kvm/include/aarch64/processor.h
@@ -64,8 +64,9 @@ static inline void set_reg(struct kvm_vm *vm, uint32_t vcpuid, uint64_t id, uint
}

void aarch64_vcpu_setup(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_vcpu_init *init);
-void aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid,
- struct kvm_vcpu_init *init, void *guest_code);
+struct kvm_vcpu *aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpu_id,
+ struct kvm_vcpu_init *init,
+ void *guest_code);

struct ex_regs {
u64 regs[31];
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index c7abe48d07cb..622b09ec23dd 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -656,12 +656,14 @@ static inline void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid,
* vcpuid - The id of the VCPU to add to the VM.
* guest_code - The vCPU's entry point
*/
-void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
+struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
+ void *guest_code);

-static inline void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid,
- void *guest_code)
+static inline struct kvm_vcpu *vm_vcpu_add_default(struct kvm_vm *vm,
+ uint32_t vcpu_id,
+ void *guest_code)
{
- vm_arch_vcpu_add(vm, vcpuid, guest_code);
+ return vm_arch_vcpu_add(vm, vcpu_id, guest_code);
}

void virt_arch_pgd_alloc(struct kvm_vm *vm);
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index d14579176e52..2b169b4ec29e 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -314,25 +314,29 @@ void vcpu_arch_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t in
indent, "", pstate, pc);
}

-void aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid,
- struct kvm_vcpu_init *init, void *guest_code)
+struct kvm_vcpu *aarch64_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpu_id,
+ struct kvm_vcpu_init *init,
+ void *guest_code)
{
size_t stack_size = vm->page_size == 4096 ?
DEFAULT_STACK_PGS * vm->page_size :
vm->page_size;
uint64_t stack_vaddr = vm_vaddr_alloc(vm, stack_size,
DEFAULT_ARM64_GUEST_STACK_VADDR_MIN);
+ struct kvm_vcpu *vcpu = vm_vcpu_add(vm, vcpu_id);

- vm_vcpu_add(vm, vcpuid);
- aarch64_vcpu_setup(vm, vcpuid, init);
+ aarch64_vcpu_setup(vm, vcpu_id, init);

- set_reg(vm, vcpuid, ARM64_CORE_REG(sp_el1), stack_vaddr + stack_size);
- set_reg(vm, vcpuid, ARM64_CORE_REG(regs.pc), (uint64_t)guest_code);
+ set_reg(vm, vcpu_id, ARM64_CORE_REG(sp_el1), stack_vaddr + stack_size);
+ set_reg(vm, vcpu_id, ARM64_CORE_REG(regs.pc), (uint64_t)guest_code);
+
+ return vcpu;
}

-void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
+struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
+ void *guest_code)
{
- aarch64_vcpu_add_default(vm, vcpuid, NULL, guest_code);
+ return aarch64_vcpu_add_default(vm, vcpu_id, NULL, guest_code);
}

void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)
diff --git a/tools/testing/selftests/kvm/lib/riscv/processor.c b/tools/testing/selftests/kvm/lib/riscv/processor.c
index d70d5a4c5ad6..5946101144eb 100644
--- a/tools/testing/selftests/kvm/lib/riscv/processor.c
+++ b/tools/testing/selftests/kvm/lib/riscv/processor.c
@@ -274,7 +274,8 @@ static void __aligned(16) guest_unexp_trap(void)
0, 0, 0, 0, 0, 0);
}

-void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
+struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
+ void *guest_code)
{
int r;
size_t stack_size = vm->page_size == 4096 ?
@@ -284,9 +285,10 @@ void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
DEFAULT_RISCV_GUEST_STACK_VADDR_MIN);
unsigned long current_gp = 0;
struct kvm_mp_state mps;
+ struct kvm_vcpu *vcpu;

- vm_vcpu_add(vm, vcpuid);
- riscv_vcpu_mmu_setup(vm, vcpuid);
+ vcpu = vm_vcpu_add(vm, vcpu_id);
+ riscv_vcpu_mmu_setup(vm, vcpu_id);

/*
* With SBI HSM support in KVM RISC-V, all secondary VCPUs are
@@ -294,23 +296,25 @@ void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
* are powered-on using KVM_SET_MP_STATE ioctl().
*/
mps.mp_state = KVM_MP_STATE_RUNNABLE;
- r = __vcpu_ioctl(vm, vcpuid, KVM_SET_MP_STATE, &mps);
+ r = __vcpu_ioctl(vm, vcpu_id, KVM_SET_MP_STATE, &mps);
TEST_ASSERT(!r, "IOCTL KVM_SET_MP_STATE failed (error %d)", r);

/* Setup global pointer of guest to be same as the host */
asm volatile (
"add %0, gp, zero" : "=r" (current_gp) : : "memory");
- set_reg(vm, vcpuid, RISCV_CORE_REG(regs.gp), current_gp);
+ set_reg(vm, vcpu_id, RISCV_CORE_REG(regs.gp), current_gp);

/* Setup stack pointer and program counter of guest */
- set_reg(vm, vcpuid, RISCV_CORE_REG(regs.sp),
+ set_reg(vm, vcpu_id, RISCV_CORE_REG(regs.sp),
stack_vaddr + stack_size);
- set_reg(vm, vcpuid, RISCV_CORE_REG(regs.pc),
+ set_reg(vm, vcpu_id, RISCV_CORE_REG(regs.pc),
(unsigned long)guest_code);

/* Setup default exception vector of guest */
- set_reg(vm, vcpuid, RISCV_CSR_REG(stvec),
+ set_reg(vm, vcpu_id, RISCV_CSR_REG(stvec),
(unsigned long)guest_unexp_trap);
+
+ return vcpu;
}

void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c
index c2fe56a3fb74..cf759844b226 100644
--- a/tools/testing/selftests/kvm/lib/s390x/processor.c
+++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
@@ -154,12 +154,14 @@ void virt_arch_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
virt_dump_region(stream, vm, indent, vm->pgd);
}

-void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
+struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
+ void *guest_code)
{
size_t stack_size = DEFAULT_STACK_PGS * getpagesize();
uint64_t stack_vaddr;
struct kvm_regs regs;
struct kvm_sregs sregs;
+ struct kvm_vcpu *vcpu;
struct kvm_run *run;

TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x",
@@ -168,21 +170,23 @@ void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
stack_vaddr = vm_vaddr_alloc(vm, stack_size,
DEFAULT_GUEST_STACK_VADDR_MIN);

- vm_vcpu_add(vm, vcpuid);
+ vcpu = vm_vcpu_add(vm, vcpu_id);

/* Setup guest registers */
- vcpu_regs_get(vm, vcpuid, &regs);
+ vcpu_regs_get(vm, vcpu_id, &regs);
regs.gprs[15] = stack_vaddr + (DEFAULT_STACK_PGS * getpagesize()) - 160;
- vcpu_regs_set(vm, vcpuid, &regs);
+ vcpu_regs_set(vm, vcpu_id, &regs);

- vcpu_sregs_get(vm, vcpuid, &sregs);
+ vcpu_sregs_get(vm, vcpu_id, &sregs);
sregs.crs[0] |= 0x00040000; /* Enable floating point regs */
sregs.crs[1] = vm->pgd | 0xf; /* Primary region table */
- vcpu_sregs_set(vm, vcpuid, &sregs);
+ vcpu_sregs_set(vm, vcpu_id, &sregs);

- run = vcpu_state(vm, vcpuid);
+ run = vcpu_state(vm, vcpu_id);
run->psw_mask = 0x0400000180000000ULL; /* DAT enabled + 64 bit mode */
run->psw_addr = (uintptr_t)guest_code;
+
+ return vcpu;
}

void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...)
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index b9201760a662..8255042de0d0 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -633,29 +633,33 @@ void vm_xsave_req_perm(int bit)
bitmask);
}

-void vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code)
+struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
+ void *guest_code)
{
struct kvm_mp_state mp_state;
struct kvm_regs regs;
vm_vaddr_t stack_vaddr;
+ struct kvm_vcpu *vcpu;
+
stack_vaddr = vm_vaddr_alloc(vm, DEFAULT_STACK_PGS * getpagesize(),
DEFAULT_GUEST_STACK_VADDR_MIN);

- /* Create VCPU */
- vm_vcpu_add(vm, vcpuid);
- vcpu_set_cpuid(vm, vcpuid, kvm_get_supported_cpuid());
- vcpu_setup(vm, vcpuid);
+ vcpu = vm_vcpu_add(vm, vcpu_id);
+ vcpu_set_cpuid(vm, vcpu_id, kvm_get_supported_cpuid());
+ vcpu_setup(vm, vcpu_id);

/* Setup guest general purpose registers */
- vcpu_regs_get(vm, vcpuid, &regs);
+ vcpu_regs_get(vm, vcpu_id, &regs);
regs.rflags = regs.rflags | 0x2;
regs.rsp = stack_vaddr + (DEFAULT_STACK_PGS * getpagesize());
regs.rip = (unsigned long) guest_code;
- vcpu_regs_set(vm, vcpuid, &regs);
+ vcpu_regs_set(vm, vcpu_id, &regs);

/* Setup the MP state */
mp_state.mp_state = 0;
- vcpu_mp_state_set(vm, vcpuid, &mp_state);
+ vcpu_mp_state_set(vm, vcpu_id, &mp_state);
+
+ return vcpu;
}

/*
diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
index 96455ec6ea48..8b034a8617e1 100644
--- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
+++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
@@ -343,10 +343,8 @@ static void test_pmu_config_disable(void (*guest_code)(void))

vm_enable_cap(vm, KVM_CAP_PMU_CAPABILITY, KVM_PMU_CAP_DISABLE);

- vm_vcpu_add_default(vm, 0, guest_code);
+ vcpu = vm_vcpu_add_default(vm, 0, guest_code);
vm_init_descriptor_tables(vm);
-
- vcpu = vcpu_get(vm, 0);
vcpu_init_descriptor_tables(vm, vcpu->id);

TEST_ASSERT(!sanity_check_pmu(vcpu),
diff --git a/tools/testing/selftests/kvm/x86_64/tsc_scaling_sync.c b/tools/testing/selftests/kvm/x86_64/tsc_scaling_sync.c
index b7cd5c47fc53..ea70ca2e63c3 100644
--- a/tools/testing/selftests/kvm/x86_64/tsc_scaling_sync.c
+++ b/tools/testing/selftests/kvm/x86_64/tsc_scaling_sync.c
@@ -54,8 +54,7 @@ static void *run_vcpu(void *_cpu_nr)
/* The kernel is fine, but vm_vcpu_add_default() needs locking */
pthread_spin_lock(&create_lock);

- vm_vcpu_add_default(vm, vcpu_id, guest_code);
- vcpu = vcpu_get(vm, vcpu_id);
+ vcpu = vm_vcpu_add_default(vm, vcpu_id, guest_code);

if (!first_cpu_done) {
first_cpu_done = true;
--
2.36.1.255.ge46751e96f-goog