File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
new file mode 100644
index 0000000..d0a2a2f
--- /dev/null
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -0,0 +1,166 @@
+/*
+ * 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 */