DR4/DR5 can only be written when CR4.DE is clear, and otherwise trigger
a #GP exception. The BIOS might not clear CR4.DE so update the tests not
to make this assumption.
Signed-off-by: Nadav Amit <namit@xxxxxxxxxx>
---
x86/svm_tests.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index d4d130f..9adee23 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -171,6 +171,7 @@ static void prepare_dr_intercept(struct svm_test *test)
default_prepare(test);
vmcb->control.intercept_dr_read = 0xff;
vmcb->control.intercept_dr_write = 0xff;
+ vmcb->save.cr4 &= ~X86_CR4_DE;
}
static void test_dr_intercept(struct svm_test *test)
--
2.25.1
