1c040c748SMichael Ellerman /* SPDX-License-Identifier: GPL-2.0-or-later */ 2c040c748SMichael Ellerman #ifndef _ASM_POWERPC_VPHN_H 3c040c748SMichael Ellerman #define _ASM_POWERPC_VPHN_H 4c040c748SMichael Ellerman 5c040c748SMichael Ellerman /* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. */ 6c040c748SMichael Ellerman #define VPHN_REGISTER_COUNT 6 7c040c748SMichael Ellerman 8c040c748SMichael Ellerman /* 9c040c748SMichael Ellerman * 6 64-bit registers unpacked into up to 24 be32 associativity values. To 10c040c748SMichael Ellerman * form the complete property we have to add the length in the first cell. 11c040c748SMichael Ellerman */ 12c040c748SMichael Ellerman #define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u16) + 1) 13c040c748SMichael Ellerman 14c040c748SMichael Ellerman /* 15c040c748SMichael Ellerman * The H_HOME_NODE_ASSOCIATIVITY hcall takes two values for flags: 16c040c748SMichael Ellerman * 1 for retrieving associativity information for a guest cpu 17c040c748SMichael Ellerman * 2 for retrieving associativity information for a host/hypervisor cpu 18c040c748SMichael Ellerman */ 19c040c748SMichael Ellerman #define VPHN_FLAG_VCPU 1 20c040c748SMichael Ellerman #define VPHN_FLAG_PCPU 2 21c040c748SMichael Ellerman 22*9a6c05feSMichael Ellerman long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity); 23*9a6c05feSMichael Ellerman 24c040c748SMichael Ellerman #endif // _ASM_POWERPC_VPHN_H 25