diff options
| -rw-r--r-- | arch/powerpc/include/asm/opal.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/setup.c | 11 |
3 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 48ad678..c5cd728 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -128,6 +128,7 @@ extern int opal_enter_rtas(struct rtas_args *args, #define OPAL_XSCOM_WRITE 66 #define OPAL_LPC_READ 67 #define OPAL_LPC_WRITE 68 +#define OPAL_RETURN_CPU 69 #ifndef __ASSEMBLY__ @@ -646,6 +647,7 @@ int64_t opal_set_system_attention_led(uint8_t led_action); int64_t opal_pci_next_error(uint64_t phb_id, uint64_t *first_frozen_pe, uint16_t *pci_error_type, uint16_t *severity); int64_t opal_pci_poll(uint64_t phb_id); +int64_t opal_return_cpu(void); int64_t opal_xscom_read(uint32_t gcid, uint32_t pcb_addr, uint64_t *val); int64_t opal_xscom_write(uint32_t gcid, uint32_t pcb_addr, uint64_t val); diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index 42c06fb..8f38445 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -115,3 +115,4 @@ OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ); OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE); OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); +OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 4ddb339..e239dcf 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -31,6 +31,7 @@ #include <asm/xics.h> #include <asm/rtas.h> #include <asm/opal.h> +#include <asm/kexec.h> #include "powernv.h" @@ -153,6 +154,16 @@ static void pnv_shutdown(void) static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) { xics_kexec_teardown_cpu(secondary); + + /* Return secondary CPUs to firmware on OPAL v3 */ + if (firmware_has_feature(FW_FEATURE_OPALv3) && secondary) { + mb(); + get_paca()->kexec_state = KEXEC_STATE_REAL_MODE; + mb(); + + /* Return the CPU to OPAL */ + opal_return_cpu(); + } } #endif /* CONFIG_KEXEC */ |