diff mbox series

[v2,6/9] KVM: arm64: selftests: Change debug_version() to take ID_AA64DFR0_EL1

Message ID 20221020054202.2119018-7-reijiw@google.com (mailing list archive)
State New, archived
Headers show
Series KVM: arm64: selftests: Test linked {break,watch}points | expand

Commit Message

Reiji Watanabe Oct. 20, 2022, 5:41 a.m. UTC 
Change debug_version() to take the ID_AA64DFR0_EL1 value instead of
vcpu as an argument, and change its callsite to read ID_AA64DFR0_EL1
(and pass it to debug_version()).
Subsequent patches will reuse the register value in the callsite.

No functional change intended.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
---
 tools/testing/selftests/kvm/aarch64/debug-exceptions.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
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Patch

diff --git a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
index 040e4d7f8755..72ec9bb16682 100644
--- a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
+++ b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
@@ -337,11 +337,8 @@  static void guest_code_ss(int test_cnt)
 	GUEST_DONE();
 }
 
-static int debug_version(struct kvm_vcpu *vcpu)
+static int debug_version(uint64_t id_aa64dfr0)
 {
-	uint64_t id_aa64dfr0;
-
-	vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64DFR0_EL1), &id_aa64dfr0);
 	return FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_DEBUGVER), id_aa64dfr0);
 }
 
@@ -466,9 +463,11 @@  int main(int argc, char *argv[])
 	struct kvm_vm *vm;
 	int opt;
 	int ss_iteration = 10000;
+	uint64_t aa64dfr0;
 
 	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
-	__TEST_REQUIRE(debug_version(vcpu) >= 6,
+	vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64DFR0_EL1), &aa64dfr0);
+	__TEST_REQUIRE(debug_version(aa64dfr0) >= 6,
 		       "Armv8 debug architecture not supported.");
 	kvm_vm_free(vm);