/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* lppaca . h
* Copyright ( C ) 2001 Mike Corrigan IBM Corporation
*/
#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>
#include <asm /paca.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 4 kB 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
* 1 kB , so we dynamically allocate 1 kB and advertise size as 1 kB , 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 l2_counters_enable; /* Enable usage of counters for KVM guest */
u8 reserved8[27 ];
__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[64 ]; /* [S]PURR expropriated/donated */
volatile __be64 enqueue_dispatch_tb; /* Total TB enqueue->dispatch */
volatile __be64 ready_enqueue_tb; /* Total TB ready->enqueue */
volatile __be64 wait_ready_tb; /* Total TB wait->ready */
u8 reserved11[16 ];
/* cacheline 4-5 */
__be32 page_ins; /* CMO Hint - # page ins by OS */
u8 reserved12[28 ];
volatile __be64 l1_to_l2_cs_tb;
volatile __be64 l2_to_l1_cs_tb;
volatile __be64 l2_runtime_tb;
u8 reserved13[96 ];
volatile __be64 dtl_idx; /* Dispatch Trace Log head index */
u8 reserved14[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
#ifdef CONFIG_PPC_PSERIES
/*
* All CPUs should have the same shared proc value , so directly access the PACA
* to avoid false positives from DEBUG_PREEMPT .
*/
static inline bool lppaca_shared_proc(void )
{
struct lppaca *l = local_paca->lppaca_ptr;
if (!firmware_has_feature(FW_FEATURE_SPLPAR))
return false ;
return !!(l->__old_status & LPPACA_OLD_SHARED_PROC);
}
#define get_lppaca() (get_paca()->lppaca_ptr)
#endif
/*
* 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 64 bits , 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;
#endif /* CONFIG_PPC_BOOK3S */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_LPPACA_H */
Messung V0.5 in Prozent C=75 H=74 G=74
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-02)
¤
*© Formatika GbR, Deutschland