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ppc/spapr: Add hotremovable flag on DIMM LMBs on drmem_v2

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On reboot, all memory that was previously added using object_add and
device_add is placed in this DIMM area.

The new SPAPR_LMB_FLAGS_HOTREMOVABLE flag helps Linux to put this memory in
the correct memory zone, so no unmovable allocations are made there,
allowing the object to be easily hot-removed by device_del and
object_del.

This new flag was accepted in Power Architecture documentation.

Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
Reviewed-by: Bharata B Rao <bharata@linux.ibm.com>
Message-Id: <20200511200201.58537-1-leobras.c@gmail.com>
[dwg: Fixed syntax error spotted by Cédric Le Goater]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Leonardo Bras 2020-05-11 17:02:02 -03:00 • committed by David Gibson
parent 3c89b8d6ac
commit 0911a60c76
5 changed files with 36 additions and 13 deletions
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3
hw/ppc/spapr.c
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@ -445,7 +445,8 @@ static int spapr_dt_dynamic_memory_v2(SpaprMachineState *spapr, void *fdt,
g_assert(drc);
elem = spapr_get_drconf_cell(size / lmb_size, addr,
spapr_drc_index(drc), node,
SPAPR_LMB_FLAGS_ASSIGNED);
(SPAPR_LMB_FLAGS_ASSIGNED |
SPAPR_LMB_FLAGS_HOTREMOVABLE));
QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry);
nr_entries++;
cur_addr = addr + size;