diff options
| -rw-r--r-- | arch/powerpc/platforms/pseries/htmdump.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/htmdump.c b/arch/powerpc/platforms/pseries/htmdump.c index 5c1eef1b827a..4dd077cc850b 100644 --- a/arch/powerpc/platforms/pseries/htmdump.c +++ b/arch/powerpc/platforms/pseries/htmdump.c @@ -17,6 +17,7 @@ static u32 nodalchipindex; static u32 coreindexonchip; static u32 htmtype; static u32 htmconfigure; +static u32 htmstart; static struct dentry *htmdump_debugfs_dir; #define HTM_ENABLE 1 #define HTM_DISABLE 0 @@ -157,7 +158,55 @@ static int htmconfigure_get(void *data, u64 *val) return 0; } +static int htmstart_set(void *data, u64 val) +{ + long rc, ret; + + /* + * value as 1: start HTM + * value as 0: stop HTM + * Return -EINVAL for other values. + */ + if (val == HTM_ENABLE) { + /* + * Invoke H_HTM call with: + * - operation as htm start (H_HTM_OP_START) + * - last three values are unused, hence set to zero + */ + rc = htm_hcall_wrapper(nodeindex, nodalchipindex, coreindexonchip, + htmtype, H_HTM_OP_START, 0, 0, 0); + + } else if (val == HTM_DISABLE) { + /* + * Invoke H_HTM call with: + * - operation as htm stop (H_HTM_OP_STOP) + * - last three values are unused, hence set to zero + */ + rc = htm_hcall_wrapper(nodeindex, nodalchipindex, coreindexonchip, + htmtype, H_HTM_OP_STOP, 0, 0, 0); + } else + return -EINVAL; + + ret = htm_return_check(rc); + if (ret <= 0) { + pr_debug("H_HTM hcall failed, returning %ld\n", ret); + return ret; + } + + /* Set htmstart if H_HTM_OP_START/H_HTM_OP_STOP operation succeeds */ + htmstart = val; + + return 0; +} + +static int htmstart_get(void *data, u64 *val) +{ + *val = htmstart; + return 0; +} + DEFINE_SIMPLE_ATTRIBUTE(htmconfigure_fops, htmconfigure_get, htmconfigure_set, "%llu\n"); +DEFINE_SIMPLE_ATTRIBUTE(htmstart_fops, htmstart_get, htmstart_set, "%llu\n"); static int htmdump_init_debugfs(void) { @@ -184,6 +233,7 @@ static int htmdump_init_debugfs(void) * Debugfs interface files to control HTM operations: */ debugfs_create_file("htmconfigure", 0600, htmdump_debugfs_dir, NULL, &htmconfigure_fops); + debugfs_create_file("htmstart", 0600, htmdump_debugfs_dir, NULL, &htmstart_fops); return 0; } |