| /* | |
| * lppaca.h | |
| * Copyright (C) 2001 Mike Corrigan IBM Corporation | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, write to the Free Software | |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| */ | |
| #ifndef _ASM_POWERPC_LPPACA_H | |
| #define _ASM_POWERPC_LPPACA_H | |
| #ifdef __KERNEL__ | |
| /* | |
| * These definitions relate to hypervisors that only exist when using | |
| * a server type processor | |
| */ | |
| #ifdef CONFIG_PPC_BOOK3S | |
| /* | |
| * This control block contains the data that is shared between the | |
| * hypervisor and the OS. | |
| */ | |
| #include <linux/cache.h> | |
| #include <linux/threads.h> | |
| #include <asm/types.h> | |
| #include <asm/mmu.h> | |
| #include <asm/firmware.h> | |
| /* | |
| * The lppaca is the "virtual processor area" registered with the hypervisor, | |
| * H_REGISTER_VPA etc. | |
| * | |
| * According to PAPR, the structure is 640 bytes long, must be L1 cache line | |
| * aligned, and must not cross a 4kB boundary. Its size field must be at | |
| * least 640 bytes (but may be more). | |
| * | |
| * Pre-v4.14 KVM hypervisors reject the VPA if its size field is smaller than | |
| * 1kB, so we dynamically allocate 1kB and advertise size as 1kB, but keep | |
| * this structure as the canonical 640 byte size. | |
| */ | |
| struct lppaca { | |
| /* cacheline 1 contains read-only data */ | |
| __be32 desc; /* Eye catcher 0xD397D781 */ | |
| __be16 size; /* Size of this struct */ | |
| u8 reserved1[3]; | |
| u8 __old_status; /* Old status, including shared proc */ | |
| u8 reserved3[14]; | |
| volatile __be32 dyn_hw_node_id; /* Dynamic hardware node id */ | |
| volatile __be32 dyn_hw_proc_id; /* Dynamic hardware proc id */ | |
| u8 reserved4[56]; | |
| volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */ | |
| /* associativity change counters */ | |
| u8 reserved5[32]; | |
| /* cacheline 2 contains local read-write data */ | |
| u8 reserved6[48]; | |
| u8 cede_latency_hint; | |
| u8 ebb_regs_in_use; | |
| u8 reserved7[6]; | |
| u8 dtl_enable_mask; /* Dispatch Trace Log mask */ | |
| u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */ | |
| u8 fpregs_in_use; | |
| u8 pmcregs_in_use; | |
| u8 reserved8[28]; | |
| __be64 wait_state_cycles; /* Wait cycles for this proc */ | |
| u8 reserved9[28]; | |
| __be16 slb_count; /* # of SLBs to maintain */ | |
| u8 idle; /* Indicate OS is idle */ | |
| u8 vmxregs_in_use; | |
| /* cacheline 3 is shared with other processors */ | |
| /* | |
| * This is the yield_count. An "odd" value (low bit on) means that | |
| * the processor is yielded (either because of an OS yield or a | |
| * hypervisor preempt). An even value implies that the processor is | |
| * currently executing. | |
| * NOTE: Even dedicated processor partitions can yield so this | |
| * field cannot be used to determine if we are shared or dedicated. | |
| */ | |
| volatile __be32 yield_count; | |
| volatile __be32 dispersion_count; /* dispatch changed physical cpu */ | |
| volatile __be64 cmo_faults; /* CMO page fault count */ | |
| volatile __be64 cmo_fault_time; /* CMO page fault time */ | |
| u8 reserved10[104]; | |
| /* cacheline 4-5 */ | |
| __be32 page_ins; /* CMO Hint - # page ins by OS */ | |
| u8 reserved11[148]; | |
| volatile __be64 dtl_idx; /* Dispatch Trace Log head index */ | |
| u8 reserved12[96]; | |
| } ____cacheline_aligned; | |
| #define lppaca_of(cpu) (*paca_ptrs[cpu]->lppaca_ptr) | |
| /* | |
| * We are using a non architected field to determine if a partition is | |
| * shared or dedicated. This currently works on both KVM and PHYP, but | |
| * we will have to transition to something better. | |
| */ | |
| #define LPPACA_OLD_SHARED_PROC 2 | |
| static inline bool lppaca_shared_proc(struct lppaca *l) | |
| { | |
| if (!firmware_has_feature(FW_FEATURE_SPLPAR)) | |
| return false; | |
| return !!(l->__old_status & LPPACA_OLD_SHARED_PROC); | |
| } | |
| /* | |
| * SLB shadow buffer structure as defined in the PAPR. The save_area | |
| * contains adjacent ESID and VSID pairs for each shadowed SLB. The | |
| * ESID is stored in the lower 64bits, then the VSID. | |
| */ | |
| struct slb_shadow { | |
| __be32 persistent; /* Number of persistent SLBs */ | |
| __be32 buffer_length; /* Total shadow buffer length */ | |
| __be64 reserved; | |
| struct { | |
| __be64 esid; | |
| __be64 vsid; | |
| } save_area[SLB_NUM_BOLTED]; | |
| } ____cacheline_aligned; | |
| /* | |
| * Layout of entries in the hypervisor's dispatch trace log buffer. | |
| */ | |
| struct dtl_entry { | |
| u8 dispatch_reason; | |
| u8 preempt_reason; | |
| __be16 processor_id; | |
| __be32 enqueue_to_dispatch_time; | |
| __be32 ready_to_enqueue_time; | |
| __be32 waiting_to_ready_time; | |
| __be64 timebase; | |
| __be64 fault_addr; | |
| __be64 srr0; | |
| __be64 srr1; | |
| }; | |
| #define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */ | |
| #define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry)) | |
| extern struct kmem_cache *dtl_cache; | |
| /* | |
| * When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls | |
| * reading from the dispatch trace log. If other code wants to consume | |
| * DTL entries, it can set this pointer to a function that will get | |
| * called once for each DTL entry that gets processed. | |
| */ | |
| extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index); | |
| #endif /* CONFIG_PPC_BOOK3S */ | |
| #endif /* __KERNEL__ */ | |
| #endif /* _ASM_POWERPC_LPPACA_H */ |