linux-kernel - [RFC 20/33] KVM: x86/mmu: Decouple hugepage_has_attrs() from struct kvm's mem_attr

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Message-ID: <20231108111806.92604-21-nsaenz@amazon.com>
Date:   Wed, 8 Nov 2023 11:17:53 +0000
From:   Nicolas Saenz Julienne <nsaenz@...zon.com>
To:     <kvm@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-hyperv@...r.kernel.org>,
        <pbonzini@...hat.com>, <seanjc@...gle.com>, <vkuznets@...hat.com>,
        <anelkz@...zon.com>, <graf@...zon.com>, <dwmw@...zon.co.uk>,
        <jgowans@...zon.com>, <corbert@....net>, <kys@...rosoft.com>,
        <haiyangz@...rosoft.com>, <decui@...rosoft.com>, <x86@...nel.org>,
        <linux-doc@...r.kernel.org>,
        Nicolas Saenz Julienne <nsaenz@...zon.com>
Subject: [RFC 20/33] KVM: x86/mmu: Decouple hugepage_has_attrs() from struct kvm's mem_attr_array

Decouple hugepage_has_attrs() from struct kvm's mem_attr_array to
allow other memory attribute sources to use the function.

Signed-off-by: Nicolas Saenz Julienne <nsaenz@...zon.com>
---
 arch/x86/kvm/mmu/mmu.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 4ace2f8660b0..c0fd3afd6be5 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -7290,19 +7290,19 @@ static void hugepage_set_mixed(struct kvm_memory_slot *slot, gfn_t gfn,
 	lpage_info_slot(gfn, slot, level)->disallow_lpage |= KVM_LPAGE_MIXED_FLAG;
 }
 
-static bool hugepage_has_attrs(struct kvm *kvm, struct kvm_memory_slot *slot,
-			       gfn_t gfn, int level, unsigned long attrs)
+static bool hugepage_has_attrs(struct xarray *mem_attr_array,
+			       struct kvm_memory_slot *slot, gfn_t gfn,
+			       int level, unsigned long attrs)
 {
 	const unsigned long start = gfn;
 	const unsigned long end = start + KVM_PAGES_PER_HPAGE(level);
 
 	if (level == PG_LEVEL_2M)
-		return kvm_range_has_memory_attributes(&kvm->mem_attr_array,
-						       start, end, attrs);
+		return kvm_range_has_memory_attributes(mem_attr_array, start, end, attrs);
 
 	for (gfn = start; gfn < end; gfn += KVM_PAGES_PER_HPAGE(level - 1)) {
 		if (hugepage_test_mixed(slot, gfn, level - 1) ||
-		    attrs != kvm_get_memory_attributes(&kvm->mem_attr_array, gfn))
+		    attrs != kvm_get_memory_attributes(mem_attr_array, gfn))
 			return false;
 	}
 	return true;
@@ -7344,7 +7344,8 @@ bool kvm_arch_post_set_memory_attributes(struct kvm *kvm,
 			 * misaligned address regardless of memory attributes.
 			 */
 			if (gfn >= slot->base_gfn) {
-				if (hugepage_has_attrs(kvm, slot, gfn, level, attrs))
+				if (hugepage_has_attrs(&kvm->mem_attr_array,
+						       slot, gfn, level, attrs))
 					hugepage_clear_mixed(slot, gfn, level);
 				else
 					hugepage_set_mixed(slot, gfn, level);
@@ -7366,7 +7367,8 @@ bool kvm_arch_post_set_memory_attributes(struct kvm *kvm,
 		 */
 		if (gfn < range->end &&
 		    (gfn + nr_pages) <= (slot->base_gfn + slot->npages)) {
-			if (hugepage_has_attrs(kvm, slot, gfn, level, attrs))
+			if (hugepage_has_attrs(&kvm->mem_attr_array, slot, gfn,
+					       level, attrs))
 				hugepage_clear_mixed(slot, gfn, level);
 			else
 				hugepage_set_mixed(slot, gfn, level);
@@ -7405,7 +7407,7 @@ void kvm_mmu_init_memslot_memory_attributes(struct kvm *kvm,
 			unsigned long attrs =
 				kvm_get_memory_attributes(&kvm->mem_attr_array, gfn);
 
-			if (hugepage_has_attrs(kvm, slot, gfn, level, attrs))
+			if (hugepage_has_attrs(&kvm->mem_attr_array, slot, gfn, level, attrs))
 				hugepage_clear_mixed(slot, gfn, level);
 			else
 				hugepage_set_mixed(slot, gfn, level);
-- 
2.40.1