Release 4.18 arch/powerpc/include/asm/lppaca.h
/*
* 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Anton Blanchard | 23 | 67.65% | 2 | 66.67% |
| Aneesh Kumar K.V | 11 | 32.35% | 1 | 33.33% |
| Total | 34 | 100.00% | 3 | 100.00% |
/*
* 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 */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Anton Blanchard | 159 | 44.54% | 8 | 24.24% |
| Paul Mackerras | 59 | 16.53% | 3 | 9.09% |
| Michael Neuling | 31 | 8.68% | 1 | 3.03% |
| Aneesh Kumar K.V | 14 | 3.92% | 1 | 3.03% |
| Stephen Rothwell | 12 | 3.36% | 2 | 6.06% |
| Jesse Larrew | 12 | 3.36% | 1 | 3.03% |
| Brian King | 11 | 3.08% | 2 | 6.06% |
| Jeremy Kerr | 10 | 2.80% | 1 | 3.03% |
| Benjamin Herrenschmidt | 9 | 2.52% | 2 | 6.06% |
| Andrew Morton | 8 | 2.24% | 2 | 6.06% |
| Gautham R. Shenoy | 7 | 1.96% | 1 | 3.03% |
| Arnd Bergmann | 6 | 1.68% | 1 | 3.03% |
| Nishanth Aravamudan | 6 | 1.68% | 1 | 3.03% |
| Michael Ellerman | 4 | 1.12% | 1 | 3.03% |
| Nicholas Piggin | 3 | 0.84% | 2 | 6.06% |
| David Gibson | 3 | 0.84% | 1 | 3.03% |
| Frédéric Weisbecker | 1 | 0.28% | 1 | 3.03% |
| Olof Johansson | 1 | 0.28% | 1 | 3.03% |
| Jake Moilanen | 1 | 0.28% | 1 | 3.03% |
| Total | 357 | 100.00% | 33 | 100.00% |
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