diff options
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 71 | ||||
| -rw-r--r-- | include/asm-powerpc/firmware.h | 3 |
2 files changed, 73 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 90beb444e1d..063a0d2fba3 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -314,6 +314,76 @@ static int pseries_set_xdabr(unsigned long dabr) H_DABRX_KERNEL | H_DABRX_USER); } +#define CMO_CHARACTERISTICS_TOKEN 44 +#define CMO_MAXLENGTH 1026 + +/** + * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, + * handle that here. (Stolen from parse_system_parameter_string) + */ +void pSeries_cmo_feature_init(void) +{ + char *ptr, *key, *value, *end; + int call_status; + int PrPSP = -1; + int SecPSP = -1; + + pr_debug(" -> fw_cmo_feature_init()\n"); + spin_lock(&rtas_data_buf_lock); + memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); + call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, + NULL, + CMO_CHARACTERISTICS_TOKEN, + __pa(rtas_data_buf), + RTAS_DATA_BUF_SIZE); + + if (call_status != 0) { + spin_unlock(&rtas_data_buf_lock); + pr_debug("CMO not available\n"); + pr_debug(" <- fw_cmo_feature_init()\n"); + return; + } + + end = rtas_data_buf + CMO_MAXLENGTH - 2; + ptr = rtas_data_buf + 2; /* step over strlen value */ + key = value = ptr; + + while (*ptr && (ptr <= end)) { + /* Separate the key and value by replacing '=' with '\0' and + * point the value at the string after the '=' + */ + if (ptr[0] == '=') { + ptr[0] = '\0'; + value = ptr + 1; + } else if (ptr[0] == '\0' || ptr[0] == ',') { + /* Terminate the string containing the key/value pair */ + ptr[0] = '\0'; + + if (key == value) { + pr_debug("Malformed key/value pair\n"); + /* Never found a '=', end processing */ + break; + } + + if (0 == strcmp(key, "PrPSP")) + PrPSP = simple_strtol(value, NULL, 10); + else if (0 == strcmp(key, "SecPSP")) + SecPSP = simple_strtol(value, NULL, 10); + value = key = ptr + 1; + } + ptr++; + } + + if (PrPSP != -1 || SecPSP != -1) { + pr_info("CMO enabled\n"); + pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", PrPSP, SecPSP); + powerpc_firmware_features |= FW_FEATURE_CMO; + } else + pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", PrPSP, SecPSP); + spin_unlock(&rtas_data_buf_lock); + pr_debug(" <- fw_cmo_feature_init()\n"); +} + /* * Early initialization. Relocation is on but do not reference unbolted pages */ @@ -329,6 +399,7 @@ static void __init pSeries_init_early(void) else if (firmware_has_feature(FW_FEATURE_XDABR)) ppc_md.set_dabr = pseries_set_xdabr; + pSeries_cmo_feature_init(); iommu_init_early_pSeries(); pr_debug(" <- pSeries_init_early()\n"); diff --git a/include/asm-powerpc/firmware.h b/include/asm-powerpc/firmware.h index ef328995ba9..3a179827528 100644 --- a/include/asm-powerpc/firmware.h +++ b/include/asm-powerpc/firmware.h @@ -46,6 +46,7 @@ #define FW_FEATURE_PS3_LV1 ASM_CONST(0x0000000000800000) #define FW_FEATURE_BEAT ASM_CONST(0x0000000001000000) #define FW_FEATURE_BULK_REMOVE ASM_CONST(0x0000000002000000) +#define FW_FEATURE_CMO ASM_CONST(0x0000000004000000) #ifndef __ASSEMBLY__ @@ -58,7 +59,7 @@ enum { FW_FEATURE_MIGRATE | FW_FEATURE_PERFMON | FW_FEATURE_CRQ | FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN | FW_FEATURE_BULK | FW_FEATURE_XDABR | FW_FEATURE_MULTITCE | - FW_FEATURE_SPLPAR | FW_FEATURE_LPAR, + FW_FEATURE_SPLPAR | FW_FEATURE_LPAR | FW_FEATURE_CMO, FW_FEATURE_PSERIES_ALWAYS = 0, FW_FEATURE_ISERIES_POSSIBLE = FW_FEATURE_ISERIES | FW_FEATURE_LPAR, FW_FEATURE_ISERIES_ALWAYS = FW_FEATURE_ISERIES | FW_FEATURE_LPAR, |