xref: /illumos-kvm-cmd/cache-utils.c (revision 68396ea9)
1 #include "cache-utils.h"
2 
3 #if defined(_ARCH_PPC)
4 struct qemu_cache_conf qemu_cache_conf = {
5     .dcache_bsize = 16,
6     .icache_bsize = 16
7 };
8 
9 #if defined _AIX
10 #include <sys/systemcfg.h>
11 
ppc_init_cacheline_sizes(void)12 static void ppc_init_cacheline_sizes(void)
13 {
14     qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
15     qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
16 }
17 
18 #elif defined __linux__
19 
20 #define QEMU_AT_NULL        0
21 #define QEMU_AT_DCACHEBSIZE 19
22 #define QEMU_AT_ICACHEBSIZE 20
23 
ppc_init_cacheline_sizes(char ** envp)24 static void ppc_init_cacheline_sizes(char **envp)
25 {
26     unsigned long *auxv;
27 
28     while (*envp++);
29 
30     for (auxv = (unsigned long *) envp; *auxv != QEMU_AT_NULL; auxv += 2) {
31         switch (*auxv) {
32         case QEMU_AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
33         case QEMU_AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
34         default: break;
35         }
36     }
37 }
38 
39 #elif defined __APPLE__
40 #include <stdio.h>
41 #include <sys/types.h>
42 #include <sys/sysctl.h>
43 
ppc_init_cacheline_sizes(void)44 static void ppc_init_cacheline_sizes(void)
45 {
46     size_t len;
47     unsigned cacheline;
48     int name[2] = { CTL_HW, HW_CACHELINE };
49 
50     len = sizeof(cacheline);
51     if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
52         perror("sysctl CTL_HW HW_CACHELINE failed");
53     } else {
54         qemu_cache_conf.dcache_bsize = cacheline;
55         qemu_cache_conf.icache_bsize = cacheline;
56     }
57 }
58 #endif
59 
60 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
61 #include <errno.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <sys/types.h>
66 #include <sys/sysctl.h>
67 
ppc_init_cacheline_sizes(void)68 static void ppc_init_cacheline_sizes(void)
69 {
70     size_t len = 4;
71     unsigned cacheline;
72 
73     if (sysctlbyname ("machdep.cacheline_size", &cacheline, &len, NULL, 0)) {
74         fprintf(stderr, "sysctlbyname machdep.cacheline_size failed: %s\n",
75                 strerror(errno));
76         exit(1);
77     }
78 
79     qemu_cache_conf.dcache_bsize = cacheline;
80     qemu_cache_conf.icache_bsize = cacheline;
81 }
82 #endif
83 
84 #ifdef __linux__
qemu_cache_utils_init(char ** envp)85 void qemu_cache_utils_init(char **envp)
86 {
87     ppc_init_cacheline_sizes(envp);
88 }
89 #else
qemu_cache_utils_init(char ** envp)90 void qemu_cache_utils_init(char **envp)
91 {
92     (void) envp;
93     ppc_init_cacheline_sizes();
94 }
95 #endif
96 
97 #endif /* _ARCH_PPC */
98