1 files changed, 73 insertions, 63 deletions

diff --git a/arch/arm64/kvm/hyp/nvhe/setup.c b/arch/arm64/kvm/hyp/nvhe/setup.c
index e8d4ea2fcfa0..bc58d1b515af 100644
--- a/arch/arm64/kvm/hyp/nvhe/setup.c
+++ b/arch/arm64/kvm/hyp/nvhe/setup.c
@@ -11,11 +11,13 @@
 #include <asm/kvm_pkvm.h>
 
 #include <nvhe/early_alloc.h>
+#include <nvhe/ffa.h>
 #include <nvhe/fixed_config.h>
 #include <nvhe/gfp.h>
 #include <nvhe/memory.h>
 #include <nvhe/mem_protect.h>
 #include <nvhe/mm.h>
+#include <nvhe/pkvm.h>
 #include <nvhe/trap_handler.h>
 
 unsigned long hyp_nr_cpus;
@@ -24,23 +26,29 @@ unsigned long hyp_nr_cpus;
 			 (unsigned long)__per_cpu_start)
 
 static void *vmemmap_base;
+static void *vm_table_base;
 static void *hyp_pgt_base;
 static void *host_s2_pgt_base;
+static void *ffa_proxy_pages;
 static struct kvm_pgtable_mm_ops pkvm_pgtable_mm_ops;
 static struct hyp_pool hpool;
 
 static int divide_memory_pool(void *virt, unsigned long size)
 {
-	unsigned long vstart, vend, nr_pages;
+	unsigned long nr_pages;
 
 	hyp_early_alloc_init(virt, size);
 
-	hyp_vmemmap_range(__hyp_pa(virt), size, &vstart, &vend);
-	nr_pages = (vend - vstart) >> PAGE_SHIFT;
+	nr_pages = hyp_vmemmap_pages(sizeof(struct hyp_page));
 	vmemmap_base = hyp_early_alloc_contig(nr_pages);
 	if (!vmemmap_base)
 		return -ENOMEM;
 
+	nr_pages = hyp_vm_table_pages();
+	vm_table_base = hyp_early_alloc_contig(nr_pages);
+	if (!vm_table_base)
+		return -ENOMEM;
+
 	nr_pages = hyp_s1_pgtable_pages();
 	hyp_pgt_base = hyp_early_alloc_contig(nr_pages);
 	if (!hyp_pgt_base)
@@ -51,6 +59,11 @@ static int divide_memory_pool(void *virt, unsigned long size)
 	if (!host_s2_pgt_base)
 		return -ENOMEM;
 
+	nr_pages = hyp_ffa_proxy_pages();
+	ffa_proxy_pages = hyp_early_alloc_contig(nr_pages);
+	if (!ffa_proxy_pages)
+		return -ENOMEM;
+
 	return 0;
 }
 
@@ -78,7 +91,7 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
 	if (ret)
 		return ret;
 
-	ret = hyp_back_vmemmap(phys, size, hyp_virt_to_phys(vmemmap_base));
+	ret = hyp_back_vmemmap(hyp_virt_to_phys(vmemmap_base));
 	if (ret)
 		return ret;
 
@@ -100,7 +113,6 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
 
 	for (i = 0; i < hyp_nr_cpus; i++) {
 		struct kvm_nvhe_init_params *params = per_cpu_ptr(&kvm_init_params, i);
-		unsigned long hyp_addr;
 
 		start = (void *)kern_hyp_va(per_cpu_base[i]);
 		end = start + PAGE_ALIGN(hyp_percpu_size);
@@ -108,50 +120,23 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
 		if (ret)
 			return ret;
 
-		/*
-		 * Allocate a contiguous HYP private VA range for the stack
-		 * and guard page. The allocation is also aligned based on
-		 * the order of its size.
-		 */
-		ret = pkvm_alloc_private_va_range(PAGE_SIZE * 2, &hyp_addr);
-		if (ret)
-			return ret;
-
-		/*
-		 * Since the stack grows downwards, map the stack to the page
-		 * at the higher address and leave the lower guard page
-		 * unbacked.
-		 *
-		 * Any valid stack address now has the PAGE_SHIFT bit as 1
-		 * and addresses corresponding to the guard page have the
-		 * PAGE_SHIFT bit as 0 - this is used for overflow detection.
-		 */
-		hyp_spin_lock(&pkvm_pgd_lock);
-		ret = kvm_pgtable_hyp_map(&pkvm_pgtable, hyp_addr + PAGE_SIZE,
-					PAGE_SIZE, params->stack_pa, PAGE_HYP);
-		hyp_spin_unlock(&pkvm_pgd_lock);
+		ret = pkvm_create_stack(params->stack_pa, &params->stack_hyp_va);
 		if (ret)
 			return ret;
-
-		/* Update stack_hyp_va to end of the stack's private VA range */
-		params->stack_hyp_va = hyp_addr + (2 * PAGE_SIZE);
 	}
 
 	/*
-	 * Map the host's .bss and .rodata sections RO in the hypervisor, but
-	 * transfer the ownership from the host to the hypervisor itself to
-	 * make sure it can't be donated or shared with another entity.
+	 * Map the host sections RO in the hypervisor, but transfer the
+	 * ownership from the host to the hypervisor itself to make sure they
+	 * can't be donated or shared with another entity.
 	 *
 	 * The ownership transition requires matching changes in the host
 	 * stage-2. This will be done later (see finalize_host_mappings()) once
 	 * the hyp_vmemmap is addressable.
 	 */
 	prot = pkvm_mkstate(PAGE_HYP_RO, PKVM_PAGE_SHARED_OWNED);
-	ret = pkvm_create_mappings(__start_rodata, __end_rodata, prot);
-	if (ret)
-		return ret;
-
-	ret = pkvm_create_mappings(__hyp_bss_end, __bss_stop, prot);
+	ret = pkvm_create_mappings(&kvm_vgic_global_state,
+				   &kvm_vgic_global_state + 1, prot);
 	if (ret)
 		return ret;
 
@@ -186,33 +171,20 @@ static void hpool_put_page(void *addr)
 	hyp_put_page(&hpool, addr);
 }
 
-static int finalize_host_mappings_walker(u64 addr, u64 end, u32 level,
-					 kvm_pte_t *ptep,
-					 enum kvm_pgtable_walk_flags flag,
-					 void * const arg)
+static int fix_host_ownership_walker(const struct kvm_pgtable_visit_ctx *ctx,
+				     enum kvm_pgtable_walk_flags visit)
 {
-	struct kvm_pgtable_mm_ops *mm_ops = arg;
 	enum kvm_pgtable_prot prot;
 	enum pkvm_page_state state;
-	kvm_pte_t pte = *ptep;
 	phys_addr_t phys;
 
-	if (!kvm_pte_valid(pte))
-		return 0;
-
-	/*
-	 * Fix-up the refcount for the page-table pages as the early allocator
-	 * was unable to access the hyp_vmemmap and so the buddy allocator has
-	 * initialised the refcount to '1'.
-	 */
-	mm_ops->get_page(ptep);
-	if (flag != KVM_PGTABLE_WALK_LEAF)
+	if (!kvm_pte_valid(ctx->old))
 		return 0;
 
-	if (level != (KVM_PGTABLE_MAX_LEVELS - 1))
+	if (ctx->level != KVM_PGTABLE_LAST_LEVEL)
 		return -EINVAL;
 
-	phys = kvm_pte_to_phys(pte);
+	phys = kvm_pte_to_phys(ctx->old);
 	if (!addr_is_memory(phys))
 		return -EINVAL;
 
@@ -220,10 +192,10 @@ static int finalize_host_mappings_walker(u64 addr, u64 end, u32 level,
 	 * Adjust the host stage-2 mappings to match the ownership attributes
 	 * configured in the hypervisor stage-1.
 	 */
-	state = pkvm_getstate(kvm_pgtable_hyp_pte_prot(pte));
+	state = pkvm_getstate(kvm_pgtable_hyp_pte_prot(ctx->old));
 	switch (state) {
 	case PKVM_PAGE_OWNED:
-		return host_stage2_set_owner_locked(phys, PAGE_SIZE, pkvm_hyp_id);
+		return host_stage2_set_owner_locked(phys, PAGE_SIZE, PKVM_ID_HYP);
 	case PKVM_PAGE_SHARED_OWNED:
 		prot = pkvm_mkstate(PKVM_HOST_MEM_PROT, PKVM_PAGE_SHARED_BORROWED);
 		break;
@@ -237,12 +209,25 @@ static int finalize_host_mappings_walker(u64 addr, u64 end, u32 level,
 	return host_stage2_idmap_locked(phys, PAGE_SIZE, prot);
 }
 
-static int finalize_host_mappings(void)
+static int fix_hyp_pgtable_refcnt_walker(const struct kvm_pgtable_visit_ctx *ctx,
+					 enum kvm_pgtable_walk_flags visit)
+{
+	/*
+	 * Fix-up the refcount for the page-table pages as the early allocator
+	 * was unable to access the hyp_vmemmap and so the buddy allocator has
+	 * initialised the refcount to '1'.
+	 */
+	if (kvm_pte_valid(ctx->old))
+		ctx->mm_ops->get_page(ctx->ptep);
+
+	return 0;
+}
+
+static int fix_host_ownership(void)
 {
 	struct kvm_pgtable_walker walker = {
-		.cb	= finalize_host_mappings_walker,
-		.flags	= KVM_PGTABLE_WALK_LEAF | KVM_PGTABLE_WALK_TABLE_POST,
-		.arg	= pkvm_pgtable.mm_ops,
+		.cb	= fix_host_ownership_walker,
+		.flags	= KVM_PGTABLE_WALK_LEAF,
 	};
 	int i, ret;
 
@@ -258,6 +243,18 @@ static int finalize_host_mappings(void)
 	return 0;
 }
 
+static int fix_hyp_pgtable_refcnt(void)
+{
+	struct kvm_pgtable_walker walker = {
+		.cb	= fix_hyp_pgtable_refcnt_walker,
+		.flags	= KVM_PGTABLE_WALK_LEAF | KVM_PGTABLE_WALK_TABLE_POST,
+		.arg	= pkvm_pgtable.mm_ops,
+	};
+
+	return kvm_pgtable_walk(&pkvm_pgtable, 0, BIT(pkvm_pgtable.ia_bits),
+				&walker);
+}
+
 void __noreturn __pkvm_init_finalise(void)
 {
 	struct kvm_host_data *host_data = this_cpu_ptr(&kvm_host_data);
@@ -287,10 +284,23 @@ void __noreturn __pkvm_init_finalise(void)
 	};
 	pkvm_pgtable.mm_ops = &pkvm_pgtable_mm_ops;
 
-	ret = finalize_host_mappings();
+	ret = fix_host_ownership();
+	if (ret)
+		goto out;
+
+	ret = fix_hyp_pgtable_refcnt();
+	if (ret)
+		goto out;
+
+	ret = hyp_create_pcpu_fixmap();
+	if (ret)
+		goto out;
+
+	ret = hyp_ffa_init(ffa_proxy_pages);
 	if (ret)
 		goto out;
 
+	pkvm_hyp_vm_table_init(vm_table_base);
 out:
 	/*
 	 * We tail-called to here from handle___pkvm_init() and will not return,