Verify that KVM correctly intercepts MSRs outside of all MSRPM ranges. To
keep the run time sane, test only MSRs just before/after each range. Odds
are very good that any bug that affects one out-of-range MSR will affect
all out-of-range MSRs.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
x86/svm_tests.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index b738eb44..1795d7f6 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -322,7 +322,7 @@ static void test_msr_intercept(struct svm_test *test)
u64 ignored;
int vector;
- for (msr_index = 0; msr_index <= 0xc0011fff; msr_index++) {
+ for (msr_index = 0; msr_index <= 0xc0012000; msr_index++) {
if (msr_index == 0xC0010131 /* MSR_SEV_STATUS */) {
/*
* Per section 15.34.10 "SEV_STATUS MSR" of AMD64 Architecture
@@ -333,11 +333,14 @@ static void test_msr_intercept(struct svm_test *test)
continue;
}
- /* Skips gaps between supported MSR ranges */
- if (msr_index == 0x2000)
- msr_index = 0xc0000000;
- else if (msr_index == 0xc0002000)
- msr_index = 0xc0010000;
+ /*
+ * Test one MSR just before and after each range, but otherwise
+ * skips gaps between supported MSR ranges.
+ */
+ if (msr_index == 0x2000 + 1)
+ msr_index = 0xc0000000 - 1;
+ else if (msr_index == 0xc0002000 + 1)
+ msr_index = 0xc0010000 - 1;
test->scratch = -1;
--
2.50.0.rc0.604.gd4ff7b7c86-goog
