Merge branch kvm-arm64/pkvm-vcpu-state into kvmarm-master/next

* kvm-arm64/pkvm-vcpu-state: (25 commits)
  : .
  : Large drop of pKVM patches from Will Deacon and co, adding
  : a private vm/vcpu state at EL2, managed independently from
  : the EL1 state. From the cover letter:
  :
  : "This is version six of the pKVM EL2 state series, extending the pKVM
  : hypervisor code so that it can dynamically instantiate and manage VM
  : data structures without the host being able to access them directly.
  : These structures consist of a hyp VM, a set of hyp vCPUs and the stage-2
  : page-table for the MMU. The pages used to hold the hypervisor structures
  : are returned to the host when the VM is destroyed."
  : .
  KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run()
  KVM: arm64: Don't unnecessarily map host kernel sections at EL2
  KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
  KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2
  KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host
  KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache
  KVM: arm64: Instantiate guest stage-2 page-tables at EL2
  KVM: arm64: Consolidate stage-2 initialisation into a single function
  KVM: arm64: Add generic hyp_memcache helpers
  KVM: arm64: Provide I-cache invalidation by virtual address at EL2
  KVM: arm64: Initialise hypervisor copies of host symbols unconditionally
  KVM: arm64: Add per-cpu fixmap infrastructure at EL2
  KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1
  KVM: arm64: Add infrastructure to create and track pKVM instances at EL2
  KVM: arm64: Rename 'host_kvm' to 'host_mmu'
  KVM: arm64: Add hyp_spinlock_t static initializer
  KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h
  KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2
  KVM: arm64: Prevent the donation of no-map pages
  KVM: arm64: Implement do_donate() helper for donating memory
  ...

Signed-off-by: Marc Zyngier <maz@kernel.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h
index d5cb01f8dc06..63f81b27a4e3 100644
--- a/arch/arm64/include/asm/kvm_pgtable.h
+++ b/arch/arm64/include/asm/kvm_pgtable.h
@@ -42,6 +42,8 @@ typedef u64 kvm_pte_t;
 #define KVM_PTE_ADDR_MASK		GENMASK(47, PAGE_SHIFT)
 #define KVM_PTE_ADDR_51_48		GENMASK(15, 12)
 
+#define KVM_PHYS_INVALID		(-1ULL)
+
 static inline bool kvm_pte_valid(kvm_pte_t pte)
 {
 	return pte & KVM_PTE_VALID;
@@ -57,6 +59,18 @@ static inline u64 kvm_pte_to_phys(kvm_pte_t pte)
 	return pa;
 }
 
+static inline kvm_pte_t kvm_phys_to_pte(u64 pa)
+{
+	kvm_pte_t pte = pa & KVM_PTE_ADDR_MASK;
+
+	if (PAGE_SHIFT == 16) {
+		pa &= GENMASK(51, 48);
+		pte |= FIELD_PREP(KVM_PTE_ADDR_51_48, pa >> 48);
+	}
+
+	return pte;
+}
+
 static inline u64 kvm_granule_shift(u32 level)
 {
 	/* Assumes KVM_PGTABLE_MAX_LEVELS is 4 */
@@ -382,6 +396,14 @@ u64 kvm_pgtable_hyp_unmap(struct kvm_pgtable *pgt, u64 addr, u64 size);
 u64 kvm_get_vtcr(u64 mmfr0, u64 mmfr1, u32 phys_shift);
 
 /**
+ * kvm_pgtable_stage2_pgd_size() - Helper to compute size of a stage-2 PGD
+ * @vtcr:	Content of the VTCR register.
+ *
+ * Return: the size (in bytes) of the stage-2 PGD
+ */
+size_t kvm_pgtable_stage2_pgd_size(u64 vtcr);
+
+/**
  * __kvm_pgtable_stage2_init() - Initialise a guest stage-2 page-table.
  * @pgt:	Uninitialised page-table structure to initialise.
  * @mmu:	S2 MMU context for this S2 translation