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From 5b826e7ed09ecf3b2837d147fec6b593f629e450 Mon Sep 17 00:00:00 2001
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From: Greg Kurz <gkurz@redhat.com>
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Date: Fri, 4 Dec 2020 15:07:59 -0500
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Subject: [PATCH 01/14] ppc/spapr: Add hotremovable flag on DIMM LMBs on
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drmem_v2
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Greg Kurz <gkurz@redhat.com>
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Message-id: <20201204150800.264829-2-gkurz@redhat.com>
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Patchwork-id: 100217
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O-Subject: [RHEL-8.4.0 qemu-kvm PATCH 1/2] ppc/spapr: Add hotremovable flag on DIMM LMBs on drmem_v2
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Bugzilla: 1901837
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RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
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RH-Acked-by: David Gibson <dgibson@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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From: Leonardo Bras <leonardo@linux.ibm.com>
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On reboot, all memory that was previously added using object_add and
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device_add is placed in this DIMM area.
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The new SPAPR_LMB_FLAGS_HOTREMOVABLE flag helps Linux to put this memory in
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the correct memory zone, so no unmovable allocations are made there,
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allowing the object to be easily hot-removed by device_del and
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object_del.
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This new flag was accepted in Power Architecture documentation.
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Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
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Reviewed-by: Bharata B Rao <bharata@linux.ibm.com>
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Message-Id: <20200511200201.58537-1-leobras.c@gmail.com>
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[dwg: Fixed syntax error spotted by Cédric Le Goater]
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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(cherry picked from commit 0911a60c76b8598f1863c6951b2b690059465153)
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Signed-off-by: Greg Kurz <gkurz@redhat.com>
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Conflicts:
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hw/ppc/pnv.c
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The changes in this file clearly don't belong to this
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patch. Same goes for the changes in target/ppc/cpu.h and
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target/ppc/excp_helper.c. Something went wrong when the
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patch was applied. Anyway, downstream doesn't especially
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care for pnv, so just drop the changes.
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/ppc/spapr.c | 3 ++-
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include/hw/ppc/spapr.h | 1 +
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2 files changed, 3 insertions(+), 1 deletion(-)
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diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
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index a330f038b95..c74079702d0 100644
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--- a/hw/ppc/spapr.c
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+++ b/hw/ppc/spapr.c
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@@ -690,7 +690,8 @@ static int spapr_populate_drmem_v2(SpaprMachineState *spapr, void *fdt,
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g_assert(drc);
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elem = spapr_get_drconf_cell(size / lmb_size, addr,
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spapr_drc_index(drc), node,
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- SPAPR_LMB_FLAGS_ASSIGNED);
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+ (SPAPR_LMB_FLAGS_ASSIGNED |
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+ SPAPR_LMB_FLAGS_HOTREMOVABLE));
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QSIMPLEQ_INSERT_TAIL(&drconf_queue, elem, entry);
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nr_entries++;
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cur_addr = addr + size;
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diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
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index aa89cc4a95c..e047dabf300 100644
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--- a/include/hw/ppc/spapr.h
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+++ b/include/hw/ppc/spapr.h
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@@ -847,6 +847,7 @@ int spapr_rtc_import_offset(SpaprRtcState *rtc, int64_t legacy_offset);
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#define SPAPR_LMB_FLAGS_ASSIGNED 0x00000008
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#define SPAPR_LMB_FLAGS_DRC_INVALID 0x00000020
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#define SPAPR_LMB_FLAGS_RESERVED 0x00000080
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+#define SPAPR_LMB_FLAGS_HOTREMOVABLE 0x00000100
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void spapr_do_system_reset_on_cpu(CPUState *cs, run_on_cpu_data arg);
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--
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2.27.0
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