[V2 PATCH 3/6] KVM: selftests: x86: Add IS_ALIGNED/IS_PAGE_ALIGNED helpers

Vishal Annapurve
2022-12-05T23:24:11Z

Add IS_ALIGNED/IS_PAGE_ALIGNED helpers for selftests.

Signed-off-by: Vishal Annapurve <vannapurve@google.com>
---
tools/testing/selftests/kvm/include/kvm_util_base.h | 3 +++
tools/testing/selftests/kvm/include/x86_64/processor.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 4ad99f295f2a..7ba32471df50 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -170,6 +170,9 @@ extern enum vm_guest_mode vm_mode_default;
#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
#define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE)

+/* @a is a power of 2 value */
+#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
+
struct vm_guest_mode_params {
unsigned int pa_bits;
unsigned int va_bits;
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 5d310abe6c3f..4d5dd9a467e1 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -279,6 +279,7 @@ static inline unsigned int x86_model(unsigned int eax)
#define PAGE_SHIFT 12
#define PAGE_SIZE (1ULL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1) & PHYSICAL_PAGE_MASK)
+#define IS_PAGE_ALIGNED(x) IS_ALIGNED(x, PAGE_SIZE)

#define HUGEPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9))
#define HUGEPAGE_SIZE(x) (1UL << HUGEPAGE_SHIFT(x))
--
2.39.0.rc0.267.gcb52ba06e7-goog