include/nvhe/memory.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 #ifndef __KVM_HYP_MEMORY_H
0003 #define __KVM_HYP_MEMORY_H
0004
0005 #include <asm/kvm_mmu.h>
0006 #include <asm/page.h>
0007
0008 #include <linux/types.h>
0009
0010 struct hyp_page {
0011     unsigned short refcount;
0012     unsigned short order;
0013 };
0014
0015 extern u64 __hyp_vmemmap;
0016 #define hyp_vmemmap ((struct hyp_page *)__hyp_vmemmap)
0017
0018 #define __hyp_va(phys)  ((void *)((phys_addr_t)(phys) - hyp_physvirt_offset))
0019
0020 static inline void *hyp_phys_to_virt(phys_addr_t phys)
0021 {
0022     return __hyp_va(phys);
0023 }
0024
0025 static inline phys_addr_t hyp_virt_to_phys(void *addr)
0026 {
0027     return __hyp_pa(addr);
0028 }
0029
0030 #define hyp_phys_to_pfn(phys)   ((phys) >> PAGE_SHIFT)
0031 #define hyp_pfn_to_phys(pfn)    ((phys_addr_t)((pfn) << PAGE_SHIFT))
0032 #define hyp_phys_to_page(phys)  (&hyp_vmemmap[hyp_phys_to_pfn(phys)])
0033 #define hyp_virt_to_page(virt)  hyp_phys_to_page(__hyp_pa(virt))
0034 #define hyp_virt_to_pfn(virt)   hyp_phys_to_pfn(__hyp_pa(virt))
0035
0036 #define hyp_page_to_pfn(page)   ((struct hyp_page *)(page) - hyp_vmemmap)
0037 #define hyp_page_to_phys(page)  hyp_pfn_to_phys((hyp_page_to_pfn(page)))
0038 #define hyp_page_to_virt(page)  __hyp_va(hyp_page_to_phys(page))
0039 #define hyp_page_to_pool(page)  (((struct hyp_page *)page)->pool)
0040
0041 static inline int hyp_page_count(void *addr)
0042 {
0043     struct hyp_page *p = hyp_virt_to_page(addr);
0044
0045     return p->refcount;
0046 }
0047
0048 #endif /* __KVM_HYP_MEMORY_H */