On 11/03/25 10:20, Harsh Prateek Bora wrote:
<...snip...>
--- a/hw/ppc/pnv_sbe.c
+++ b/hw/ppc/pnv_sbe.c
@@ -82,6 +82,8 @@
#define SBE_CONTROL_REG_S0 PPC_BIT(14)
#define SBE_CONTROL_REG_S1 PPC_BIT(15)
+static uint64_t mpipl_skiboot_base = 0x30000000 /*default
SKIBOOT_BASE*/;
+
static void pnv_sbe_set_host_doorbell(PnvSBE *sbe, uint64_t val)
{
val &= SBE_HOST_RESPONSE_MASK; /* Is this right? What does HW
do? */
@@ -281,6 +283,29 @@ static void do_sbe_msg(PnvSBE *sbe)
timer_del(sbe->timer);
}
break;
+ case SBE_CMD_STASH_MPIPL_CONFIG:
+ /* key = sbe->mbox[1] */
+ switch (sbe->mbox[1]) {
+ case SBE_STASH_KEY_SKIBOOT_BASE:
+ mpipl_skiboot_base = sbe->mbox[2];
+ qemu_log_mask(LOG_UNIMP,
+ "Stashing skiboot base: 0x%lx\n", mpipl_skiboot_base);
+
+ /*
+ * Set the response register.
+ *
+ * Currently setting the same sequence number in
+ * response as we got in the request.
+ */
+ sbe->mbox[4] = sbe->mbox[0]; /* sequence number */
+ pnv_sbe_set_host_doorbell(sbe,
+ sbe->host_doorbell | SBE_HOST_RESPONSE_WAITING);
+
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "SBE Unimplemented command:
0x%x\n", cmd);
Unimplemented SBE_CMD_STASH_MPIPL_CONFIG key ?
Got it. Thanks for the reword suggestion, will do it.
Thanks,
- Aditya G
+ }
+ break;
default:
qemu_log_mask(LOG_UNIMP, "SBE Unimplemented command:
0x%x\n", cmd);
}
diff --git a/include/hw/ppc/pnv_sbe.h b/include/hw/ppc/pnv_sbe.h
index b6b378ad14c7..f6cbcf990ed9 100644
--- a/include/hw/ppc/pnv_sbe.h
+++ b/include/hw/ppc/pnv_sbe.h
@@ -53,4 +53,7 @@ struct PnvSBEClass {
const MemoryRegionOps *xscom_mbox_ops;
};
+/* Helper to access stashed SKIBOOT_BASE */
+bool pnv_sbe_mpipl_skiboot_base(void);
+
#endif /* PPC_PNV_SBE_H */
