powerpc/pseries: Define HVPIPE specific macros

Define HVPIPE specific macros which are needed to support
ibm,send-hvpipe-msg and ibm,receive-hvpipe-msg RTAS calls
and used to handle HVPIPE message events.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Tested-by: Shashank MS <shashank.gowda@in.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250909084402.1488456-3-haren@linux.ibm.com

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 75fa0293c508e6212387cc3422f73914b78b558a..d046bbd5017d3cfba822d7af2d13caef6c490cd0 100644 (file)
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -68,9 +68,11 @@ enum rtas_function_index {
        RTAS_FNIDX__IBM_READ_PCI_CONFIG,
        RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE,
        RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2,
+       RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG,
        RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW,
        RTAS_FNIDX__IBM_RESET_PE_DMA_WINDOW,
        RTAS_FNIDX__IBM_SCAN_LOG_DUMP,
+       RTAS_FNIDX__IBM_SEND_HVPIPE_MSG,
        RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR,
        RTAS_FNIDX__IBM_SET_EEH_OPTION,
        RTAS_FNIDX__IBM_SET_SLOT_RESET,
@@ -163,9 +165,11 @@ typedef struct {
 #define RTAS_FN_IBM_READ_PCI_CONFIG               rtas_fn_handle(RTAS_FNIDX__IBM_READ_PCI_CONFIG)
 #define RTAS_FN_IBM_READ_SLOT_RESET_STATE         rtas_fn_handle(RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE)
 #define RTAS_FN_IBM_READ_SLOT_RESET_STATE2        rtas_fn_handle(RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2)
+#define RTAS_FN_IBM_RECEIVE_HVPIPE_MSG           rtas_fn_handle(RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG)
 #define RTAS_FN_IBM_REMOVE_PE_DMA_WINDOW          rtas_fn_handle(RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW)
 #define RTAS_FN_IBM_RESET_PE_DMA_WINDOW           rtas_fn_handle(RTAS_FNIDX__IBM_RESET_PE_DMA_WINDOW)
 #define RTAS_FN_IBM_SCAN_LOG_DUMP                 rtas_fn_handle(RTAS_FNIDX__IBM_SCAN_LOG_DUMP)
+#define RTAS_FN_IBM_SEND_HVPIPE_MSG              rtas_fn_handle(RTAS_FNIDX__IBM_SEND_HVPIPE_MSG)
 #define RTAS_FN_IBM_SET_DYNAMIC_INDICATOR         rtas_fn_handle(RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR)
 #define RTAS_FN_IBM_SET_EEH_OPTION                rtas_fn_handle(RTAS_FNIDX__IBM_SET_EEH_OPTION)
 #define RTAS_FN_IBM_SET_SLOT_RESET                rtas_fn_handle(RTAS_FNIDX__IBM_SET_SLOT_RESET)
@@ -217,6 +221,7 @@ typedef struct {
 #define RTAS_HARDWARE_ERROR             -1 /* Hardware or other unspecified error. */
 #define RTAS_BUSY                       -2 /* Retry immediately. */
 #define RTAS_INVALID_PARAMETER          -3 /* Invalid indicator/domain/sensor etc. */
+#define        RTAS_FUNC_NOT_SUPPORTED         -5 /* Function not supported */
 #define RTAS_UNEXPECTED_STATE_CHANGE    -7 /* Seems limited to EEH and slot reset. */
 #define RTAS_EXTENDED_DELAY_MIN       9900 /* Retry after delaying for ~1ms. */
 #define RTAS_EXTENDED_DELAY_MAX       9905 /* Retry after delaying for ~100s. */
@@ -233,6 +238,7 @@ typedef struct {
 #define RTAS_EPOW_WARNING              0x40000000 /* set bit 1 */
 #define RTAS_HOTPLUG_EVENTS            0x10000000 /* set bit 3 */
 #define RTAS_IO_EVENTS                 0x08000000 /* set bit 4 */
+#define RTAS_HVPIPE_MSG_EVENTS         0x04000000 /* set bit 5 */
 #define RTAS_EVENT_SCAN_ALL_EVENTS     0xffffffff
 
 /* RTAS event severity */
@@ -282,6 +288,7 @@ typedef struct {
 #define RTAS_TYPE_DEALLOC              0xE3
 #define RTAS_TYPE_DUMP                 0xE4
 #define RTAS_TYPE_HOTPLUG              0xE5
+#define RTAS_TYPE_HVPIPE               0xE6
 /* I don't add PowerMGM events right now, this is a different topic */
 #define RTAS_TYPE_PMGM_POWER_SW_ON     0x60
 #define RTAS_TYPE_PMGM_POWER_SW_OFF    0x61
@@ -374,6 +381,7 @@ inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
 #define PSERIES_ELOG_SECT_ID_HMC_ID            (('H' << 8) | 'M')
 #define PSERIES_ELOG_SECT_ID_EPOW              (('E' << 8) | 'P')
 #define PSERIES_ELOG_SECT_ID_IO_EVENT          (('I' << 8) | 'E')
+#define PSERIES_ELOG_SECT_ID_HVPIPE_EVENT      (('P' << 8) | 'E')
 #define PSERIES_ELOG_SECT_ID_MANUFACT_INFO     (('M' << 8) | 'I')
 #define PSERIES_ELOG_SECT_ID_CALL_HOME         (('C' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_USER_DEF          (('U' << 8) | 'D')
@@ -519,6 +527,7 @@ extern struct mutex rtas_ibm_get_indices_lock;
 extern struct mutex rtas_ibm_set_dynamic_indicator_lock;
 extern struct mutex rtas_ibm_get_dynamic_sensor_state_lock;
 extern struct mutex rtas_ibm_physical_attestation_lock;
+extern struct mutex rtas_ibm_send_hvpipe_msg_lock;
 
 #define GLOBAL_INTERRUPT_QUEUE 9005
 

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index e61245c4468e53216e476a727e30d2ccb88601d1..8d81c1e7a8db13eca078d07c6a5a97f391c57868 100644 (file)
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -98,6 +98,8 @@ DEFINE_MUTEX(rtas_ibm_get_vpd_lock);
 DEFINE_MUTEX(rtas_ibm_get_indices_lock);
 DEFINE_MUTEX(rtas_ibm_set_dynamic_indicator_lock);
 DEFINE_MUTEX(rtas_ibm_get_dynamic_sensor_state_lock);
+DEFINE_MUTEX(rtas_ibm_receive_hvpipe_msg_lock);
+DEFINE_MUTEX(rtas_ibm_send_hvpipe_msg_lock);
 
 static struct rtas_function rtas_function_table[] __ro_after_init = {
        [RTAS_FNIDX__CHECK_EXCEPTION] = {
@@ -373,6 +375,17 @@ static struct rtas_function rtas_function_table[] __ro_after_init = {
        [RTAS_FNIDX__IBM_READ_SLOT_RESET_STATE2] = {
                .name = "ibm,read-slot-reset-state2",
        },
+       [RTAS_FNIDX__IBM_RECEIVE_HVPIPE_MSG] {
+               .name = "ibm,receive-hvpipe-msg",
+               .filter = &(const struct rtas_filter) {
+                       .buf_idx1 = 0, .size_idx1 = 1,
+                       .buf_idx2 = -1, .size_idx2 = -1,
+               },
+               /*
+                * PAPR+ v2.13 R1–7.3.32.1
+                */
+               .lock = &rtas_ibm_receive_hvpipe_msg_lock,
+       },
        [RTAS_FNIDX__IBM_REMOVE_PE_DMA_WINDOW] = {
                .name = "ibm,remove-pe-dma-window",
        },
@@ -391,6 +404,17 @@ static struct rtas_function rtas_function_table[] __ro_after_init = {
                        .buf_idx2 = -1, .size_idx2 = -1,
                },
        },
+       [RTAS_FNIDX__IBM_SEND_HVPIPE_MSG] {
+               .name = "ibm,send-hvpipe-msg",
+               .filter = &(const struct rtas_filter) {
+                       .buf_idx1 = 1, .size_idx1 = -1,
+                       .buf_idx2 = -1, .size_idx2 = -1,
+               },
+               /*
+                * PAPR+ v2.13 R1–7.3.32.2
+                */
+               .lock = &rtas_ibm_send_hvpipe_msg_lock,
+       },
        [RTAS_FNIDX__IBM_SET_DYNAMIC_INDICATOR] = {
                .name = "ibm,set-dynamic-indicator",
                .filter = &(const struct rtas_filter) {

diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 9bba469239fcd01ac232db38a05314d77f0443b0..6336ec9aedd0af09063d0404bc663f78278b680b 100644 (file)
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -89,6 +89,8 @@ static char *rtas_event_type(int type)
                        return "Platform Resource Reassignment Event";
                case RTAS_TYPE_HOTPLUG:
                        return "Hotplug Event";
+               case RTAS_TYPE_HVPIPE:
+                       return "Hypervisor Pipe Notification event";
        }
 
        return rtas_type[0];