linux-kernel - [PATCH v4 2/5] KVM: arm64: Make stage2_has

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Message-ID: <20250518054754.5345-3-ankita@nvidia.com>
Date: Sun, 18 May 2025 05:47:51 +0000
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Subject: [PATCH v4 2/5] KVM: arm64: Make stage2_has_fwb global scope

From: Ankit Agrawal <ankita@...dia.com>

Change the scope of stage2_has_fwb as it will be used in
broader KVM code to determine whether the FWB feature is
supported by the hardware.

Signed-off-by: Ankit Agrawal <ankita@...dia.com>
---
 arch/arm64/include/asm/kvm_pgtable.h | 8 ++++++++
 arch/arm64/kvm/hyp/pgtable.c         | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index 6b9d274052c7..f21e2fae2bfe 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h
@@ -507,6 +507,14 @@ u64 kvm_pgtable_hyp_unmap(struct kvm_pgtable *pgt, u64 addr, u64 size);
  */
 u64 kvm_get_vtcr(u64 mmfr0, u64 mmfr1, u32 phys_shift);
 
+/**
+ * stage2_has_fwb() - Determine whether FWB is supported
+ * @pgt:    Page-table structure initialised by kvm_pgtable_stage2_init*()
+ *
+ * Return: True if FWB is supported.
+ */
+bool stage2_has_fwb(struct kvm_pgtable *pgt);
+
 /**
  * kvm_pgtable_stage2_pgd_size() - Helper to compute size of a stage-2 PGD
  * @vtcr:	Content of the VTCR register.
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index df5cc74a7dd0..ee6b98fefd61 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -637,7 +637,7 @@ u64 kvm_get_vtcr(u64 mmfr0, u64 mmfr1, u32 phys_shift)
 	return vtcr;
 }
 
-static bool stage2_has_fwb(struct kvm_pgtable *pgt)
+bool stage2_has_fwb(struct kvm_pgtable *pgt)
 {
 	if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB))
 		return false;
-- 
2.34.1