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From: Quentin Perret <qperret@google.com>
To: Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
	 Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	 Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Fuad Tabba <tabba@google.com>,
	David Brazdil <dbrazdil@google.com>
Cc: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu,  linux-kernel@vger.kernel.org,
	kernel-team@android.com
Subject: [PATCH 12/16] KVM: arm64: Move hyp refcount helpers to header files
Date: Wed, 13 Oct 2021 16:58:27 +0100	[thread overview]
Message-ID: <20211013155831.943476-13-qperret@google.com> (raw)
In-Reply-To: <20211013155831.943476-1-qperret@google.com>

We will soon need to touch the hyp_page refcount from outside
page_alloc.c in nVHE protected mode, so move the relevant helpers into a
header file.

Signed-off-by: Quentin Perret <qperret@google.com>
---
 arch/arm64/kvm/hyp/include/nvhe/memory.h | 18 ++++++++++++++++++
 arch/arm64/kvm/hyp/nvhe/page_alloc.c     | 18 ------------------
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/arm64/kvm/hyp/include/nvhe/memory.h b/arch/arm64/kvm/hyp/include/nvhe/memory.h
index 592b7edb3edb..e77783be0f3f 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/memory.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/memory.h
@@ -12,6 +12,24 @@ struct hyp_page {
 	unsigned short order;
 };
 
+static inline void hyp_page_ref_inc(struct hyp_page *p)
+{
+	BUG_ON(p->refcount == USHRT_MAX);
+	p->refcount++;
+}
+
+static inline int hyp_page_ref_dec_and_test(struct hyp_page *p)
+{
+	p->refcount--;
+	return (p->refcount == 0);
+}
+
+static inline void hyp_set_page_refcounted(struct hyp_page *p)
+{
+	BUG_ON(p->refcount);
+	p->refcount = 1;
+}
+
 extern u64 __hyp_vmemmap;
 #define hyp_vmemmap ((struct hyp_page *)__hyp_vmemmap)
 
diff --git a/arch/arm64/kvm/hyp/nvhe/page_alloc.c b/arch/arm64/kvm/hyp/nvhe/page_alloc.c
index 38accc2e23e3..0d977169ed08 100644
--- a/arch/arm64/kvm/hyp/nvhe/page_alloc.c
+++ b/arch/arm64/kvm/hyp/nvhe/page_alloc.c
@@ -144,24 +144,6 @@ static struct hyp_page *__hyp_extract_page(struct hyp_pool *pool,
 	return p;
 }
 
-static inline void hyp_page_ref_inc(struct hyp_page *p)
-{
-	BUG_ON(p->refcount == USHRT_MAX);
-	p->refcount++;
-}
-
-static inline int hyp_page_ref_dec_and_test(struct hyp_page *p)
-{
-	p->refcount--;
-	return (p->refcount == 0);
-}
-
-static inline void hyp_set_page_refcounted(struct hyp_page *p)
-{
-	BUG_ON(p->refcount);
-	p->refcount = 1;
-}
-
 static void __hyp_put_page(struct hyp_pool *pool, struct hyp_page *p)
 {
 	if (hyp_page_ref_dec_and_test(p))
-- 
2.33.0.882.g93a45727a2-goog


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  parent reply	other threads:[~2021-10-13 16:06 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-13 15:58 [PATCH 00/16] KVM: arm64: Implement unshare hypercall for pkvm Quentin Perret
2021-10-13 15:58 ` [PATCH 01/16] KVM: arm64: Introduce do_share() helper for memory sharing between components Quentin Perret
2021-10-15 15:11   ` Andrew Walbran
2021-10-19 10:37     ` Quentin Perret
2021-10-13 15:58 ` [PATCH 02/16] KVM: arm64: Implement __pkvm_host_share_hyp() using do_share() Quentin Perret
2021-10-13 15:58 ` [PATCH 03/16] KVM: arm64: Avoid remapping the SVE state in the hyp stage-1 Quentin Perret
2021-10-16 11:04   ` Marc Zyngier
2021-10-18 10:36     ` Quentin Perret
2021-10-13 15:58 ` [PATCH 04/16] KVM: arm64: Introduce kvm_share_hyp() Quentin Perret
2021-10-17 10:41   ` Marc Zyngier
2021-10-18 10:51     ` Quentin Perret
2021-10-13 15:58 ` [PATCH 05/16] KVM: arm64: Accept page ranges in pkvm share hypercall Quentin Perret
2021-10-13 15:58 ` [PATCH 06/16] KVM: arm64: Provide {get,put}_page() stubs for early hyp allocator Quentin Perret
2021-10-13 15:58 ` [PATCH 07/16] KVM: arm64: Refcount hyp stage-1 pgtable pages Quentin Perret
2021-10-13 15:58 ` [PATCH 08/16] KVM: arm64: Fixup hyp stage-1 refcount Quentin Perret
2021-10-13 15:58 ` [PATCH 09/16] KVM: arm64: Hook up ->page_count() for hypervisor stage-1 page-table Quentin Perret
2021-10-13 15:58 ` [PATCH 10/16] KVM: arm64: Implement kvm_pgtable_hyp_unmap() at EL2 Quentin Perret
2021-10-13 15:58 ` [PATCH 11/16] KVM: arm64: Back hyp_vmemmap for all of memory Quentin Perret
2021-10-13 15:58 ` Quentin Perret [this message]
2021-10-13 15:58 ` [PATCH 13/16] KVM: arm64: Move double-sharing logic into hyp-specific function Quentin Perret
2021-10-13 15:58 ` [PATCH 14/16] KVM: arm64: Refcount shared pages at EL2 Quentin Perret
2021-10-13 15:58 ` [PATCH 15/16] KVM: arm64: pkvm: Introduce an unshare hypercall Quentin Perret
2021-10-13 15:58 ` [PATCH 16/16] KVM: arm64: pkvm: Unshare guest structs during teardown Quentin Perret
2021-10-16 12:25   ` Marc Zyngier
2021-10-18 10:32     ` Quentin Perret
2021-10-18 14:03       ` Quentin Perret
2021-10-18 17:12         ` Marc Zyngier
2021-10-19  9:40           ` Quentin Perret

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