[v2,15/24] KVM: x86/mmu: Add setter for shadow_mmio_value

Commit Message

Yan Zhao Nov. 12, 2024, 7:37 a.m. UTC

From: Isaku Yamahata <[e-mail]>

Future changes will want to set shadow_mmio_value from TDX code. Add a
helper to setter with a name that makes more sense from that context.

Signed-off-by: Isaku Yamahata <[e-mail]>
[split into new patch]
Co-developed-by: Rick Edgecombe <[e-mail]>
Signed-off-by: Rick Edgecombe <[e-mail]>
Signed-off-by: Yan Zhao <[e-mail]>
Reviewed-by: Paolo Bonzini <[e-mail]>
---
TDX MMU part 2 v2:
 - Added Paolo's rb

TDX MMU part 2 v1:
 - Split into new patch
---
 arch/x86/kvm/mmu.h      | 1 +
 arch/x86/kvm/mmu/spte.c | 6 ++++++
 2 files changed, 7 insertions(+)

Patch

diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 398b6b06ed73..a935e65a133d 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -78,6 +78,7 @@  static inline gfn_t kvm_mmu_max_gfn(void)
 u8 kvm_mmu_get_max_tdp_level(void);
 
 void kvm_mmu_set_mmio_spte_mask(u64 mmio_value, u64 mmio_mask, u64 access_mask);
+void kvm_mmu_set_mmio_spte_value(struct kvm *kvm, u64 mmio_value);
 void kvm_mmu_set_me_spte_mask(u64 me_value, u64 me_mask);
 void kvm_mmu_set_ept_masks(bool has_ad_bits, bool has_exec_only);
 
diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index f1a50a78badb..a831e76f379a 100644
--- a/arch/x86/kvm/mmu/spte.c
+++ b/arch/x86/kvm/mmu/spte.c
@@ -422,6 +422,12 @@  void kvm_mmu_set_mmio_spte_mask(u64 mmio_value, u64 mmio_mask, u64 access_mask)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_set_mmio_spte_mask);
 
+void kvm_mmu_set_mmio_spte_value(struct kvm *kvm, u64 mmio_value)
+{
+	kvm->arch.shadow_mmio_value = mmio_value;
+}
+EXPORT_SYMBOL_GPL(kvm_mmu_set_mmio_spte_value);
+
 void kvm_mmu_set_me_spte_mask(u64 me_value, u64 me_mask)
 {
 	/* shadow_me_value must be a subset of shadow_me_mask */