linux-kernel - [V1 PATCH 3/6] KVM: selftests: x86: Add IS_ALIGNED/IS_PAGE

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Date:   Fri, 11 Nov 2022 01:42:41 +0000
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     pbonzini@...hat.com, vkuznets@...hat.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, shuah@...nel.org, yang.zhong@...el.com,
        ricarkol@...gle.com, aaronlewis@...gle.com, wei.w.wang@...el.com,
        kirill.shutemov@...ux.intel.com, corbet@....net, hughd@...gle.com,
        jlayton@...nel.org, bfields@...ldses.org,
        akpm@...ux-foundation.org, chao.p.peng@...ux.intel.com,
        yu.c.zhang@...ux.intel.com, jun.nakajima@...el.com,
        dave.hansen@...el.com, michael.roth@....com, qperret@...gle.com,
        steven.price@....com, ak@...ux.intel.com, david@...hat.com,
        luto@...nel.org, vbabka@...e.cz, marcorr@...gle.com,
        erdemaktas@...gle.com, pgonda@...gle.com, nikunj@....com,
        seanjc@...gle.com, diviness@...gle.com, maz@...nel.org,
        dmatlack@...gle.com, axelrasmussen@...gle.com,
        maciej.szmigiero@...cle.com, mizhang@...gle.com,
        bgardon@...gle.com, ackerleytng@...gle.com,
        Vishal Annapurve <vannapurve@...gle.com>
Subject: [V1 PATCH 3/6] KVM: selftests: x86: Add IS_ALIGNED/IS_PAGE_ALIGNED helpers

Add IS_ALIGNED/IS_PAGE_ALIGNED helpers for selftests.

Signed-off-by: Vishal Annapurve <vannapurve@...gle.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 5e30f5b461bf..4eecc847d9f9 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -168,6 +168,9 @@ 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 e8ca0d8a6a7e..62677f266583 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -175,6 +175,7 @@ struct kvm_x86_cpu_feature {
 #define PAGE_SHIFT		12
 #define PAGE_SIZE		(1ULL << PAGE_SHIFT)
 #define PAGE_MASK		(~(PAGE_SIZE-1))
+#define IS_PAGE_ALIGNED(x)	IS_ALIGNED(x, PAGE_SIZE)
 
 #define PHYSICAL_PAGE_MASK      GENMASK_ULL(51, 12)
 #define PTE_GET_PFN(pte)        (((pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
-- 
2.38.1.431.g37b22c650d-goog