diff options
Diffstat (limited to 'arch/arm64/include/asm/kvm_pkvm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_pkvm.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h index 01129b0d4c68..e46250a02017 100644 --- a/arch/arm64/include/asm/kvm_pkvm.h +++ b/arch/arm64/include/asm/kvm_pkvm.h @@ -6,7 +6,9 @@ #ifndef __ARM64_KVM_PKVM_H__ #define __ARM64_KVM_PKVM_H__ +#include <linux/arm_ffa.h> #include <linux/memblock.h> +#include <linux/scatterlist.h> #include <asm/kvm_pgtable.h> /* Maximum number of VMs that can co-exist under pKVM. */ @@ -106,4 +108,23 @@ static inline unsigned long host_s2_pgtable_pages(void) return res; } +#define KVM_FFA_MBOX_NR_PAGES 1 + +static inline unsigned long hyp_ffa_proxy_pages(void) +{ + size_t desc_max; + + /* + * The hypervisor FFA proxy needs enough memory to buffer a fragmented + * descriptor returned from EL3 in response to a RETRIEVE_REQ call. + */ + desc_max = sizeof(struct ffa_mem_region) + + sizeof(struct ffa_mem_region_attributes) + + sizeof(struct ffa_composite_mem_region) + + SG_MAX_SEGMENTS * sizeof(struct ffa_mem_region_addr_range); + + /* Plus a page each for the hypervisor's RX and TX mailboxes. */ + return (2 * KVM_FFA_MBOX_NR_PAGES) + DIV_ROUND_UP(desc_max, PAGE_SIZE); +} + #endif /* __ARM64_KVM_PKVM_H__ */ |