2 * Jailhouse, a Linux-based partitioning hypervisor
4 * Copyright (c) Siemens AG, 2013
7 * Jan Kiszka <jan.kiszka@siemens.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
13 #ifndef _JAILHOUSE_ASM_PERCPU_H
14 #define _JAILHOUSE_ASM_PERCPU_H
16 #include <asm/types.h>
17 #include <asm/paging.h>
19 #define NUM_ENTRY_REGS 6
21 /* Keep in sync with struct per_cpu! */
22 #define PERCPU_SIZE_SHIFT 13
23 #define PERCPU_STACK_END PAGE_SIZE
24 #define PERCPU_LINUX_SP PERCPU_STACK_END
31 /* Keep these two in sync with defines above! */
33 unsigned long linux_sp;
39 unsigned long linux_reg[NUM_ENTRY_REGS];
40 // unsigned long linux_ip;
43 volatile bool stop_cpu;
44 volatile bool wait_for_sipi;
45 volatile bool cpu_stopped;
52 } __attribute__((aligned(PAGE_SIZE)));
54 static inline struct per_cpu *per_cpu(unsigned int cpu)
56 extern u8 __page_pool[];
58 return (struct per_cpu *)(__page_pool + (cpu << PERCPU_SIZE_SHIFT));
61 /* Validate defines */
62 #define CHECK_ASSUMPTION(assume) ((void)sizeof(char[1 - 2*!(assume)]))
64 static inline void __check_assumptions(void)
66 struct per_cpu cpu_data;
68 CHECK_ASSUMPTION(sizeof(struct per_cpu) == (1 << PERCPU_SIZE_SHIFT));
69 CHECK_ASSUMPTION(sizeof(cpu_data.stack) == PERCPU_STACK_END);
70 CHECK_ASSUMPTION(__builtin_offsetof(struct per_cpu, linux_sp) ==
73 #endif /* !__ASSEMBLY__ */
75 #endif /* !_JAILHOUSE_ASM_PERCPU_H */