diff options
| -rw-r--r-- | arch/powerpc/platforms/pseries/htmdump.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/htmdump.c b/arch/powerpc/platforms/pseries/htmdump.c index 604fde6a0559..5c1eef1b827a 100644 --- a/arch/powerpc/platforms/pseries/htmdump.c +++ b/arch/powerpc/platforms/pseries/htmdump.c @@ -16,7 +16,10 @@ static u32 nodeindex; static u32 nodalchipindex; static u32 coreindexonchip; static u32 htmtype; +static u32 htmconfigure; static struct dentry *htmdump_debugfs_dir; +#define HTM_ENABLE 1 +#define HTM_DISABLE 0 /* * Check the return code for H_HTM hcall. @@ -108,6 +111,54 @@ static const struct file_operations htmdump_fops = { .open = simple_open, }; +static int htmconfigure_set(void *data, u64 val) +{ + long rc, ret; + + /* + * value as 1 : configure HTM. + * value as 0 : deconfigure HTM. Return -EINVAL for + * other values. + */ + if (val == HTM_ENABLE) { + /* + * Invoke H_HTM call with: + * - operation as htm configure (H_HTM_OP_CONFIGURE) + * - last three values are unused, hence set to zero + */ + rc = htm_hcall_wrapper(nodeindex, nodalchipindex, coreindexonchip, + htmtype, H_HTM_OP_CONFIGURE, 0, 0, 0); + } else if (val == HTM_DISABLE) { + /* + * Invoke H_HTM call with: + * - operation as htm deconfigure (H_HTM_OP_DECONFIGURE) + * - last three values are unused, hence set to zero + */ + rc = htm_hcall_wrapper(nodeindex, nodalchipindex, coreindexonchip, + htmtype, H_HTM_OP_DECONFIGURE, 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 htmconfigure if operation succeeds */ + htmconfigure = val; + + return 0; +} + +static int htmconfigure_get(void *data, u64 *val) +{ + *val = htmconfigure; + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(htmconfigure_fops, htmconfigure_get, htmconfigure_set, "%llu\n"); + static int htmdump_init_debugfs(void) { htm_buf = kmalloc(PAGE_SIZE, GFP_KERNEL); @@ -129,6 +180,11 @@ static int htmdump_init_debugfs(void) htmdump_debugfs_dir, &htmtype); debugfs_create_file("trace", 0400, htmdump_debugfs_dir, htm_buf, &htmdump_fops); + /* + * Debugfs interface files to control HTM operations: + */ + debugfs_create_file("htmconfigure", 0600, htmdump_debugfs_dir, NULL, &htmconfigure_fops); + return 0; } |