opal: Enhance HMI event structure to accommodate checkstop info.

Enhance the HMI event structure to accommodate CORE/NX check stop error
information and bump up the HMI event version to V2.

	/* version 2 and later */
       union {
               /*
                * checkstop info (Core/NX).
                * Valid for OpalHMI_ERROR_MALFUNC_ALERT.
                */
               struct {
                       uint8_t xstop_type;     /* enum OpalHMI_XstopType */
                       uint8_t reserved_1[3];
                       __be32 xstop_reason;
                       union {
                               __be32 pir;     /* for CHECKSTOP_TYPE_CORE */
                               __be32 chip_id; /* for CHECKSTOP_TYPE_NX */
                       } u;
               } xstop_error;
       } u;

This patch just adds new fields to HMI event structure. The subsequent
patches will implement the logic to identify reason for CORE/NX checkstop.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/core/hmi.c b/core/hmi.c
index 96f1cbe..200a890 100644
--- a/core/hmi.c
+++ b/core/hmi.c
@@ -338,6 +338,12 @@ static int64_t opal_handle_hmi(void)
 	int rc = OPAL_SUCCESS;
 	struct OpalHMIEvent hmi_evt;
 
+	/*
+	 * Compiled time check to see size of OpalHMIEvent do not exceed
+	 * that of struct opal_msg.
+	 */
+	BUILD_ASSERT(sizeof(struct opal_msg) >= sizeof(struct OpalHMIEvent));
+
 	memset(&hmi_evt, 0, sizeof(struct OpalHMIEvent));
 	hmi_evt.version = OpalHMIEvt_V1;