/* * 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> /* * We only have to have statically allocated lppaca structs on * legacy iSeries, which supports at most 64 cpus. */ #define NR_LPPACAS 1 /* * The Hypervisor barfs if the lppaca crosses a page boundary. A 1k * alignment is sufficient to prevent this */ 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]; } __attribute__((__aligned__(0x400))); extern struct lppaca lppaca[]; #define lppaca_of(cpu) (*paca[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) { 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 */