fake/hypervisor/ffa.c

/*
 * Copyright 2021 The Hafnium Authors.
 *
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/BSD-3-Clause.
 */

#include "hf/ffa.h"

#include "hf/arch/plat/ffa.h"

#include "hf/ffa_internal.h"
#include "hf/vcpu.h"
#include "hf/vm.h"

struct ffa_value arch_ffa_features(uint32_t function_id)
{
	(void)function_id;
	return ffa_error(FFA_NOT_SUPPORTED);
}

ffa_id_t arch_ffa_spmc_id_get(void)
{
	return HF_SPMC_VM_ID;
}

void plat_ffa_log_init(void)
{
}

bool plat_ffa_is_memory_send_valid(ffa_id_t receiver, ffa_id_t sender,
				   uint32_t share_func, bool multiple_borrower)
{
	(void)share_func;
	(void)receiver;
	(void)sender;
	(void)multiple_borrower;

	return true;
}

bool plat_ffa_is_direct_request_valid(struct vcpu *current,
				      ffa_id_t sender_vm_id,
				      ffa_id_t receiver_vm_id)
{
	(void)current;
	(void)sender_vm_id;
	(void)receiver_vm_id;

	return true;
}

bool plat_ffa_is_direct_request_supported(struct vm *sender_vm,
					  struct vm *receiver_vm, uint32_t func)
{
	(void)sender_vm;
	(void)receiver_vm;
	(void)func;

	return false;
}

bool plat_ffa_is_direct_response_valid(struct vcpu *current,
				       ffa_id_t sender_vm_id,
				       ffa_id_t receiver_vm_id)
{
	(void)current;
	(void)sender_vm_id;
	(void)receiver_vm_id;

	return true;
}

bool plat_ffa_run_forward(ffa_id_t vm_id, ffa_vcpu_index_t vcpu_idx,
			  struct ffa_value *ret)
{
	(void)vm_id;
	(void)vcpu_idx;
	(void)ret;

	return false;
}

void plat_ffa_vm_destroy(struct vm_locked to_destroy_locked)
{
	(void)to_destroy_locked;
}

void plat_ffa_rxtx_unmap_forward(struct vm_locked vm_locked)
{
	(void)vm_locked;
}

bool plat_ffa_direct_request_forward(ffa_id_t receiver_vm_id,
				     struct ffa_value args,
				     struct ffa_value *ret)
{
	(void)receiver_vm_id;
	(void)args;
	(void)ret;
	return false;
}

bool plat_ffa_rx_release_forward(struct vm_locked vm_locked,
				 struct ffa_value *ret)
{
	(void)vm_locked;
	(void)ret;

	return false;
}

bool plat_ffa_acquire_receiver_rx(struct vm_locked to_locked,
				  struct ffa_value *ret)
{
	(void)to_locked;
	(void)ret;

	return false;
}

bool plat_ffa_is_indirect_msg_supported(struct vm_locked sender_locked,
					struct vm_locked receiver_locked)
{
	(void)sender_locked;
	(void)receiver_locked;

	return false;
}

bool plat_ffa_msg_send2_forward(ffa_id_t receiver_vm_id, ffa_id_t sender_vm_id,
				struct ffa_value *ret)
{
	(void)receiver_vm_id;
	(void)sender_vm_id;
	(void)ret;

	return false;
}

ffa_memory_handle_t plat_ffa_memory_handle_make(uint64_t index)
{
	return index;
}

bool plat_ffa_memory_handle_allocated_by_current_world(
	ffa_memory_handle_t handle)
{
	(void)handle;
	return false;
}

uint32_t plat_ffa_other_world_mode(void)
{
	return 0U;
}

bool plat_ffa_is_notifications_bind_valid(struct vcpu *current,
					  ffa_id_t sender_id,
					  ffa_id_t receiver_id)
{
	(void)current;
	(void)sender_id;
	(void)receiver_id;
	return false;
}

bool plat_ffa_notifications_update_bindings_forward(
	ffa_id_t receiver_id, ffa_id_t sender_id, uint32_t flags,
	ffa_notifications_bitmap_t bitmap, bool is_bind, struct ffa_value *ret)
{
	(void)ret;
	(void)receiver_id;
	(void)sender_id;
	(void)flags;
	(void)bitmap;
	(void)is_bind;
	(void)ret;

	return false;
}

void plat_ffa_rxtx_map_forward(struct vm_locked vm_locked)
{
	(void)vm_locked;
}

ffa_partition_properties_t plat_ffa_partition_properties(
	ffa_id_t vm_id, const struct vm *target)
{
	(void)vm_id;
	(void)target;
	return 0;
}

bool plat_ffa_vm_managed_exit_supported(struct vm *vm)
{
	(void)vm;
	return false;
}

/**
 * Check validity of the calls:
 * FFA_NOTIFICATION_BITMAP_CREATE/FFA_NOTIFICATION_BITMAP_DESTROY.
 */
struct ffa_value plat_ffa_is_notifications_bitmap_access_valid(
	struct vcpu *current, ffa_id_t vm_id)
{
	/*
	 * Call should only be used by the Hypervisor, so any attempt of
	 * invocation from NWd FF-A endpoints should fail.
	 */
	(void)current;
	(void)vm_id;

	return ffa_error(FFA_NOT_SUPPORTED);
}

bool plat_ffa_is_notification_set_valid(struct vcpu *current,
					ffa_id_t sender_id,
					ffa_id_t receiver_id)
{
	(void)current;
	(void)sender_id;
	(void)receiver_id;
	return false;
}

bool plat_ffa_is_notification_get_valid(struct vcpu *current,
					ffa_id_t receiver_id, uint32_t flags)
{
	(void)flags;
	(void)current;
	(void)receiver_id;
	return false;
}

bool plat_ffa_notifications_get_from_sp(
	struct vm_locked receiver_locked, ffa_vcpu_index_t vcpu_id,
	ffa_notifications_bitmap_t *from_sp,  // NOLINT
	struct ffa_value *ret)		      // NOLINT
{
	(void)receiver_locked;
	(void)vcpu_id;
	(void)from_sp;
	(void)ret;

	return false;
}

bool plat_ffa_notifications_get_framework_notifications(
	struct vm_locked receiver_locked,
	ffa_notifications_bitmap_t *from_fwk,  // NOLINT
	uint32_t flags, ffa_vcpu_index_t vcpu_id, struct ffa_value *ret)
{
	(void)receiver_locked;
	(void)from_fwk;
	(void)flags;
	(void)vcpu_id;
	(void)ret;

	return false;
}

bool plat_ffa_notification_set_forward(ffa_id_t sender_vm_id,
				       ffa_id_t receiver_vm_id, uint32_t flags,
				       ffa_notifications_bitmap_t bitmap,
				       struct ffa_value *ret)
{
	(void)sender_vm_id;
	(void)receiver_vm_id;
	(void)flags;
	(void)bitmap;
	(void)ret;

	return false;
}

struct ffa_value plat_ffa_notifications_bitmap_create(
	ffa_id_t vm_id, ffa_vcpu_count_t vcpu_count)
{
	(void)vm_id;
	(void)vcpu_count;

	return ffa_error(FFA_NOT_SUPPORTED);
}

struct ffa_value plat_ffa_notifications_bitmap_destroy(ffa_id_t vm_id)
{
	(void)vm_id;

	return ffa_error(FFA_NOT_SUPPORTED);
}

struct vm_locked plat_ffa_vm_find_locked(ffa_id_t vm_id)
{
	(void)vm_id;
	return (struct vm_locked){.vm = NULL};
}

struct vm_locked plat_ffa_vm_find_locked_create(ffa_id_t vm_id)
{
	(void)vm_id;
	return (struct vm_locked){.vm = NULL};
}

bool plat_ffa_vm_notifications_info_get(     // NOLINTNEXTLINE
	uint16_t *ids, uint32_t *ids_count,  // NOLINTNEXTLINE
	uint32_t *lists_sizes,		     // NOLINTNEXTLINE
	uint32_t *lists_count, const uint32_t ids_count_max)
{
	(void)ids;
	(void)ids_count;
	(void)lists_sizes;
	(void)lists_count;
	(void)ids_count_max;

	return false;
}

bool plat_ffa_is_mem_perm_get_valid(const struct vcpu *current)
{
	(void)current;
	return false;
}

bool plat_ffa_is_mem_perm_set_valid(const struct vcpu *current)
{
	(void)current;
	return false;
}

/**
 * Check if current VM can resume target VM/SP using FFA_RUN ABI.
 */
bool plat_ffa_run_checks(struct vcpu_locked current_locked,
			 ffa_id_t target_vm_id, ffa_vcpu_index_t vcpu_idx,
			 struct ffa_value *run_ret, struct vcpu **next)
{
	(void)current_locked;
	(void)target_vm_id;
	(void)run_ret;
	(void)next;
	(void)vcpu_idx;
	return true;
}

void plat_ffa_notification_info_get_forward(  // NOLINTNEXTLINE
	uint16_t *ids, uint32_t *ids_count,   // NOLINTNEXTLINE
	uint32_t *lists_sizes, uint32_t *lists_count,
	const uint32_t ids_count_max)
{
	(void)ids;
	(void)ids_count;
	(void)lists_sizes;
	(void)lists_count;
	(void)ids_count_max;
}

void plat_ffa_sri_state_set(enum plat_ffa_sri_state state)
{
	(void)state;
}

void plat_ffa_sri_trigger_if_delayed(struct cpu *cpu)
{
	(void)cpu;
}

void plat_ffa_sri_trigger_not_delayed(struct cpu *cpu)
{
	(void)cpu;
}

bool plat_ffa_inject_notification_pending_interrupt(
	struct vcpu_locked target_locked, struct vcpu_locked current_locked,
	struct vm_locked receiver_locked)
{
	(void)target_locked;
	(void)current_locked;
	(void)receiver_locked;

	return false;
}

bool plat_ffa_partition_info_get_regs_forward(	// NOLINTNEXTLINE
	const struct ffa_uuid *uuid,
	const uint16_t start_index,  // NOLINTNEXTLINE
	const uint16_t tag,
	struct ffa_partition_info *partitions,	// NOLINTNEXTLINE
	uint16_t partitions_len, ffa_vm_count_t *ret_count)
{
	(void)uuid;
	(void)start_index;
	(void)tag;
	(void)partitions;
	(void)partitions_len;
	(void)ret_count;
	return true;
}

void plat_ffa_partition_info_get_forward(  // NOLINTNEXTLINE
	const struct ffa_uuid *uuid,	   // NOLINTNEXTLINE
	const uint32_t flags,		   // NOLINTNEXTLINE
	struct ffa_partition_info *partitions, ffa_vm_count_t *ret_count)
{
	(void)uuid;
	(void)flags;
	(void)partitions;
	(void)ret_count;
}

bool plat_ffa_is_secondary_ep_register_supported(void)
{
	return false;
}

struct ffa_value plat_ffa_msg_wait_prepare(struct vcpu_locked current_locked,
					   struct vcpu **next)
{
	(void)current_locked;
	(void)next;

	return (struct ffa_value){.func = FFA_INTERRUPT_32};
}

bool plat_ffa_check_runtime_state_transition(struct vcpu_locked current_locked,
					     ffa_id_t vm_id,
					     ffa_id_t receiver_vm_id,
					     struct vcpu_locked receiver_locked,
					     uint32_t func,  // NOLINTNEXTLINE
					     enum vcpu_state *next_state)
{
	/* Perform state transition checks only for Secure Partitions. */
	(void)current_locked;
	(void)vm_id;
	(void)receiver_vm_id;
	(void)receiver_locked;
	(void)func;
	(void)next_state;

	return true;
}

void plat_ffa_init_schedule_mode_ffa_run(struct vcpu_locked current_locked,
					 struct vcpu_locked target_locked)
{
	/* Scheduling mode not supported in the Hypervisor/VMs. */
	(void)current_locked;
	(void)target_locked;
}

void plat_ffa_wind_call_chain_ffa_direct_req(
	struct vcpu_locked current_locked,
	struct vcpu_locked receiver_vcpu_locked, ffa_id_t sender_vm_id)
{
	/* Calls chains not supported in the Hypervisor/VMs. */
	(void)current_locked;
	(void)receiver_vcpu_locked;
	(void)sender_vm_id;
}

void plat_ffa_unwind_call_chain_ffa_direct_resp(
	struct vcpu_locked current_locked, struct vcpu_locked next_locked)
{
	/* Calls chains not supported in the Hypervisor/VMs. */
	(void)current_locked;
	(void)next_locked;
}

bool plat_ffa_is_spmd_lp_id(ffa_id_t vm_id)
{
	(void)vm_id;
	return false;
}

bool plat_ffa_intercept_direct_response(struct vcpu_locked current_locked,
					struct vcpu **next,
					struct ffa_value to_ret,
					struct ffa_value *signal_interrupt)
{
	/*
	 * Only applicable to SPMC as it signals virtual secure interrupt to
	 * S-EL0 partitions.
	 */
	(void)current_locked;
	(void)next;
	(void)to_ret;
	(void)signal_interrupt;

	return false;
}

void plat_ffa_enable_virtual_interrupts(struct vcpu_locked current_locked,
					struct vm_locked vm_locked)
{
	(void)current_locked;
	(void)vm_locked;
}

struct ffa_value plat_ffa_other_world_mem_send(
	struct vm *from, uint32_t share_func,
	struct ffa_memory_region **memory_region, uint32_t length,
	uint32_t fragment_length, struct mpool *page_pool)
{
	(void)from;
	(void)memory_region;
	(void)length;
	(void)fragment_length;
	(void)page_pool;
	(void)share_func;

	return (struct ffa_value){0};
}

struct ffa_value plat_ffa_other_world_mem_reclaim(
	struct vm *to, ffa_memory_handle_t handle,
	ffa_memory_region_flags_t flags, struct mpool *page_pool)
{
	(void)handle;
	(void)flags;
	(void)page_pool;
	(void)to;

	return ffa_error(FFA_INVALID_PARAMETERS);
}

struct ffa_value plat_ffa_other_world_mem_send_continue(
	struct vm *from, void *fragment, uint32_t fragment_length,
	ffa_memory_handle_t handle, struct mpool *page_pool)
{
	(void)from;
	(void)fragment;
	(void)fragment_length;
	(void)handle;
	(void)page_pool;

	return ffa_error(FFA_INVALID_PARAMETERS);
}

struct ffa_value plat_ffa_msg_send(ffa_id_t sender_vm_id,
				   ffa_id_t receiver_vm_id, uint32_t size,
				   struct vcpu *current, struct vcpu **next)
{
	(void)sender_vm_id;
	(void)receiver_vm_id;
	(void)size;
	(void)current;
	(void)next;

	return ffa_error(FFA_NOT_SUPPORTED);
}

struct ffa_value plat_ffa_yield_prepare(struct vcpu_locked current_locked,
					struct vcpu **next,
					uint32_t timeout_low,
					uint32_t timeout_high)
{
	(void)current_locked;
	(void)next;
	(void)timeout_low;
	(void)timeout_high;

	return ffa_error(FFA_NOT_SUPPORTED);
}

bool arch_vm_init_mm(struct vm *vm, struct mpool *ppool)
{
	(void)vm;
	(void)ppool;

	return true;
}

bool arch_vm_iommu_init_mm(struct vm *vm, struct mpool *ppool)
{
	(void)vm;
	(void)ppool;

	return true;
}

bool arch_vm_identity_prepare(struct vm_locked vm_locked, paddr_t begin,
			      paddr_t end, uint32_t mode, struct mpool *ppool)
{
	(void)vm_locked;
	(void)begin;
	(void)end;
	(void)mode;
	(void)ppool;

	return true;
}

void arch_vm_identity_commit(struct vm_locked vm_locked, paddr_t begin,
			     paddr_t end, uint32_t mode, struct mpool *ppool,
			     ipaddr_t *ipa)
{
	(void)vm_locked;
	(void)begin;
	(void)end;
	(void)mode;
	(void)ppool;
	(void)ipa;
}

bool arch_vm_unmap(struct vm_locked vm_locked, paddr_t begin, paddr_t end,
		   struct mpool *ppool)
{
	(void)vm_locked;
	(void)begin;
	(void)end;
	(void)ppool;

	return true;
}

void arch_vm_ptable_defrag(struct vm_locked vm_locked, struct mpool *ppool)
{
	(void)vm_locked;
	(void)ppool;
}

bool arch_vm_mem_get_mode(struct vm_locked vm_locked, ipaddr_t begin,
			  ipaddr_t end, uint32_t *mode)	 // NOLINT
{
	(void)vm_locked;
	(void)begin;
	(void)end;
	(void)mode;

	return true;
}

ffa_memory_attributes_t plat_ffa_memory_security_mode(
	ffa_memory_attributes_t attributes, uint32_t mode)
{
	(void)mode;

	return attributes;
}

struct ffa_value plat_ffa_error_32(struct vcpu *current, struct vcpu **next,
				   enum ffa_error error_code)
{
	(void)current;
	(void)next;
	(void)error_code;

	return ffa_error(FFA_NOT_SUPPORTED);
}

int64_t plat_ffa_mailbox_waiter_get(ffa_id_t vm_id, const struct vcpu *current)
{
	(void)vm_id;
	(void)current;

	return -1;
}

int64_t plat_ffa_mailbox_writable_get(const struct vcpu *current)
{
	(void)current;

	return -1;
}

bool plat_ffa_partition_info_get_regs_forward_allowed(void)
{
	return false;
}

void plat_ffa_free_vm_resources(struct vm_locked vm_locked)
{
	(void)vm_locked;
}

bool arch_vm_iommu_mm_identity_map(struct vm_locked vm_locked, paddr_t begin,
				   paddr_t end, uint32_t mode,
				   struct mpool *ppool, ipaddr_t *ipa,
				   struct dma_device_properties *dma_prop)
{
	(void)vm_locked;
	(void)begin;
	(void)end;
	(void)mode;
	(void)ppool;
	(void)ipa;
	(void)dma_prop;

	return true;
}