remoteproc: zynqmp: Add coredump support

Supporting remoteproc coredump requires the platform-specific driver to
register coredump segments to be dumped. Do this by calling
rproc_coredump_add_segment for every carveout.

Also call rproc_coredump_set_elf_info when then rproc is created. If the
ELFCLASS parameter is not provided then coredump fails with an error.
Other drivers seem to pass EM_NONE for the machine argument but for me
this shows a warning in gdb. Pass EM_ARM because this is an ARM R5.

Signed-off-by: Leonard Crestez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mathieu Poirier <[email protected]>

Author: cdleonard

drivers/remoteproc/xlnx_r5_remoteproc.c

@@ -486,6 +486,7 @@ static int add_mem_regions_carveout(struct rproc *rproc)
 		}
 
 		rproc_add_carveout(rproc, rproc_mem);
+		rproc_coredump_add_segment(rproc, rmem->base, rmem->size);
 
 		dev_dbg(&rproc->dev, "reserved mem carveout %s addr=%llx, size=0x%llx",
 			it.node->name, rmem->base, rmem->size);
@@ -597,6 +598,7 @@ static int add_tcm_carveout_split_mode(struct rproc *rproc)
 		}
 
 		rproc_add_carveout(rproc, rproc_mem);
+		rproc_coredump_add_segment(rproc, da, bank_size);
 	}
 
 	return 0;
@@ -676,6 +678,7 @@ static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
 
 		/* If registration is success, add carveouts */
 		rproc_add_carveout(rproc, rproc_mem);
+		rproc_coredump_add_segment(rproc, da, bank_size);
 
 		dev_dbg(dev, "TCM carveout lockstep mode %s addr=0x%llx, da=0x%x, size=0x%lx",
 			bank_name, bank_addr, da, bank_size);
@@ -853,6 +856,8 @@ static struct zynqmp_r5_core *zynqmp_r5_add_rproc_core(struct device *cdev)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	rproc_coredump_set_elf_info(r5_rproc, ELFCLASS32, EM_ARM);
+
 	r5_rproc->auto_boot = false;
 	r5_core = r5_rproc->priv;
 	r5_core->dev = cdev;