forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
2.0 KiB
67 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* Copyright (C) 2020 Google LLC |
|
* Author: Quentin Perret <[email protected]> |
|
*/ |
|
|
|
#ifndef __KVM_NVHE_MEM_PROTECT__ |
|
#define __KVM_NVHE_MEM_PROTECT__ |
|
#include <linux/kvm_host.h> |
|
#include <asm/kvm_hyp.h> |
|
#include <asm/kvm_pgtable.h> |
|
#include <asm/virt.h> |
|
#include <nvhe/spinlock.h> |
|
|
|
/* |
|
* SW bits 0-1 are reserved to track the memory ownership state of each page: |
|
* 00: The page is owned exclusively by the page-table owner. |
|
* 01: The page is owned by the page-table owner, but is shared |
|
* with another entity. |
|
* 10: The page is shared with, but not owned by the page-table owner. |
|
* 11: Reserved for future use (lending). |
|
*/ |
|
enum pkvm_page_state { |
|
PKVM_PAGE_OWNED = 0ULL, |
|
PKVM_PAGE_SHARED_OWNED = KVM_PGTABLE_PROT_SW0, |
|
PKVM_PAGE_SHARED_BORROWED = KVM_PGTABLE_PROT_SW1, |
|
}; |
|
|
|
#define PKVM_PAGE_STATE_PROT_MASK (KVM_PGTABLE_PROT_SW0 | KVM_PGTABLE_PROT_SW1) |
|
static inline enum kvm_pgtable_prot pkvm_mkstate(enum kvm_pgtable_prot prot, |
|
enum pkvm_page_state state) |
|
{ |
|
return (prot & ~PKVM_PAGE_STATE_PROT_MASK) | state; |
|
} |
|
|
|
static inline enum pkvm_page_state pkvm_getstate(enum kvm_pgtable_prot prot) |
|
{ |
|
return prot & PKVM_PAGE_STATE_PROT_MASK; |
|
} |
|
|
|
struct host_kvm { |
|
struct kvm_arch arch; |
|
struct kvm_pgtable pgt; |
|
struct kvm_pgtable_mm_ops mm_ops; |
|
hyp_spinlock_t lock; |
|
}; |
|
extern struct host_kvm host_kvm; |
|
|
|
extern const u8 pkvm_hyp_id; |
|
|
|
int __pkvm_prot_finalize(void); |
|
int __pkvm_host_share_hyp(u64 pfn); |
|
|
|
bool addr_is_memory(phys_addr_t phys); |
|
int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot); |
|
int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id); |
|
int kvm_host_prepare_stage2(void *pgt_pool_base); |
|
void handle_host_mem_abort(struct kvm_cpu_context *host_ctxt); |
|
|
|
static __always_inline void __load_host_stage2(void) |
|
{ |
|
if (static_branch_likely(&kvm_protected_mode_initialized)) |
|
__load_stage2(&host_kvm.arch.mmu, &host_kvm.arch); |
|
else |
|
write_sysreg(0, vttbr_el2); |
|
} |
|
#endif /* __KVM_NVHE_MEM_PROTECT__ */
|
|
|