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Message-ID: <20241216175803.2716565-3-qperret@google.com>
Date: Mon, 16 Dec 2024 17:57:47 +0000
From: Quentin Perret <qperret@...gle.com>
To: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>,
Joey Gouly <joey.gouly@....com>, Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>, Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>
Cc: Fuad Tabba <tabba@...gle.com>, Vincent Donnefort <vdonnefort@...gle.com>,
Sebastian Ene <sebastianene@...gle.com>, linux-arm-kernel@...ts.infradead.org,
kvmarm@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH v3 02/18] KVM: arm64: Move enum pkvm_page_state to memory.h
In order to prepare the way for storing page-tracking information in
pKVM's vmemmap, move the enum pkvm_page_state definition to
nvhe/memory.h.
No functional changes intended.
Signed-off-by: Quentin Perret <qperret@...gle.com>
---
arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 34 +------------------
arch/arm64/kvm/hyp/include/nvhe/memory.h | 33 ++++++++++++++++++
2 files changed, 34 insertions(+), 33 deletions(-)
diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
index 8c30362af2b9..25038ac705d8 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
@@ -11,42 +11,10 @@
#include <asm/kvm_mmu.h>
#include <asm/kvm_pgtable.h>
#include <asm/virt.h>
+#include <nvhe/memory.h>
#include <nvhe/pkvm.h>
#include <nvhe/spinlock.h>
-/*
- * SW bits 0-1 are reserved to track the memory ownership state of each page:
- * 00: The page is owned exclusively by the page-table owner.
- * 01: The page is owned by the page-table owner, but is shared
- * with another entity.
- * 10: The page is shared with, but not owned by the page-table owner.
- * 11: Reserved for future use (lending).
- */
-enum pkvm_page_state {
- PKVM_PAGE_OWNED = 0ULL,
- PKVM_PAGE_SHARED_OWNED = BIT(0),
- PKVM_PAGE_SHARED_BORROWED = BIT(1),
- __PKVM_PAGE_RESERVED = BIT(0) | BIT(1),
-
- /* Meta-states which aren't encoded directly in the PTE's SW bits */
- PKVM_NOPAGE = BIT(2),
-};
-#define PKVM_PAGE_META_STATES_MASK (~(BIT(0) | BIT(1)))
-
-#define PKVM_PAGE_STATE_PROT_MASK (KVM_PGTABLE_PROT_SW0 | KVM_PGTABLE_PROT_SW1)
-static inline enum kvm_pgtable_prot pkvm_mkstate(enum kvm_pgtable_prot prot,
- enum pkvm_page_state state)
-{
- prot &= ~PKVM_PAGE_STATE_PROT_MASK;
- prot |= FIELD_PREP(PKVM_PAGE_STATE_PROT_MASK, state);
- return prot;
-}
-
-static inline enum pkvm_page_state pkvm_getstate(enum kvm_pgtable_prot prot)
-{
- return FIELD_GET(PKVM_PAGE_STATE_PROT_MASK, prot);
-}
-
struct host_mmu {
struct kvm_arch arch;
struct kvm_pgtable pgt;
diff --git a/arch/arm64/kvm/hyp/include/nvhe/memory.h b/arch/arm64/kvm/hyp/include/nvhe/memory.h
index ab205c4d6774..c84b24234ac7 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/memory.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/memory.h
@@ -7,6 +7,39 @@
#include <linux/types.h>
+/*
+ * SW bits 0-1 are reserved to track the memory ownership state of each page:
+ * 00: The page is owned exclusively by the page-table owner.
+ * 01: The page is owned by the page-table owner, but is shared
+ * with another entity.
+ * 10: The page is shared with, but not owned by the page-table owner.
+ * 11: Reserved for future use (lending).
+ */
+enum pkvm_page_state {
+ PKVM_PAGE_OWNED = 0ULL,
+ PKVM_PAGE_SHARED_OWNED = BIT(0),
+ PKVM_PAGE_SHARED_BORROWED = BIT(1),
+ __PKVM_PAGE_RESERVED = BIT(0) | BIT(1),
+
+ /* Meta-states which aren't encoded directly in the PTE's SW bits */
+ PKVM_NOPAGE = BIT(2),
+};
+#define PKVM_PAGE_META_STATES_MASK (~(BIT(0) | BIT(1)))
+
+#define PKVM_PAGE_STATE_PROT_MASK (KVM_PGTABLE_PROT_SW0 | KVM_PGTABLE_PROT_SW1)
+static inline enum kvm_pgtable_prot pkvm_mkstate(enum kvm_pgtable_prot prot,
+ enum pkvm_page_state state)
+{
+ prot &= ~PKVM_PAGE_STATE_PROT_MASK;
+ prot |= FIELD_PREP(PKVM_PAGE_STATE_PROT_MASK, state);
+ return prot;
+}
+
+static inline enum pkvm_page_state pkvm_getstate(enum kvm_pgtable_prot prot)
+{
+ return FIELD_GET(PKVM_PAGE_STATE_PROT_MASK, prot);
+}
+
struct hyp_page {
unsigned short refcount;
unsigned short order;
--
2.47.1.613.gc27f4b7a9f-goog
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