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ppc/spapr: init lrdr-capapcity phys with ram size if maxmem not provided

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lrdr-capacity contains phys field which communicates the maximum address
in bytes and therefore, the most memory that can be allocated to this
partition. This is usually populated when maxmem is provided alongwith
memory size on qemu command line. However since maxmem is an optional
param, this leads to bits being set to 0 in absence of maxmem param.
Fix this by initializing the respective bits as per total mem size in
such case.

Reported-by: Gaurav Batra <gbatra@us.ibm.com>
Tested-by: David Christensen <drc@linux.ibm.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://lore.kernel.org/r/20250506042903.76250-1-harshpb@linux.ibm.com
Message-ID: <20250506042903.76250-1-harshpb@linux.ibm.com>
This commit is contained in:
Harsh Prateek Bora
2025-09-28 23:45:28 +05:30
parent f5738aedc2
commit 6285eebd3a
1 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
hw/ppc/spapr.c
+7 -4
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@@ -907,6 +907,7 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
int rtas;
GString *hypertas = g_string_sized_new(256);
GString *qemu_hypertas = g_string_sized_new(256);
uint64_t max_device_addr = 0;
uint32_t lrdr_capacity[] = {
0,
0,
@@ -917,13 +918,15 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
/* Do we have device memory? */
if (MACHINE(spapr)->device_memory) {
uint64_t max_device_addr = MACHINE(spapr)->device_memory->base +
max_device_addr = MACHINE(spapr)->device_memory->base +
memory_region_size(&MACHINE(spapr)->device_memory->mr);
lrdr_capacity[0] = cpu_to_be32(max_device_addr >> 32);
lrdr_capacity[1] = cpu_to_be32(max_device_addr & 0xffffffff);
} else if (ms->ram_size == ms->maxram_size) {
max_device_addr = ms->ram_size;
}
lrdr_capacity[0] = cpu_to_be32(max_device_addr >> 32);
lrdr_capacity[1] = cpu_to_be32(max_device_addr & 0xffffffff);
_FDT(rtas = fdt_add_subnode(fdt, 0, "rtas"));
/* hypertas */