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authorPeter Maydell <peter.maydell@linaro.org>2021-02-10 15:42:19 +0000
committerPeter Maydell <peter.maydell@linaro.org>2021-02-10 15:42:20 +0000
commit83339e21d05c824ebc9131d644f25c23d0e41ecf (patch)
tree3254c62fa674de5d3d3ae02743122ecccb000fe3 /hw/remote/memory.c
parent7b2c4cdd794e499883281c18770b2d16adebfaac (diff)
parenteb847c42296497978942f738cd41dc29a35a49b2 (diff)
Merge remote-tracking branch 'remotes/stefanha-gitlab/tags/block-pull-request' into staging
Pull request v4: * Add PCI_EXPRESS Kconfig dependency to fix s390x in "multi-process: setup PCI host bridge for remote device" [Philippe and Thomas] # gpg: Signature made Wed 10 Feb 2021 09:26:14 GMT # gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8 # gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full] # gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full] # Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8 * remotes/stefanha-gitlab/tags/block-pull-request: (27 commits) docs: fix Parallels Image "dirty bitmap" section multi-process: perform device reset in the remote process multi-process: Retrieve PCI info from remote process multi-process: create IOHUB object to handle irq multi-process: Synchronize remote memory multi-process: PCI BAR read/write handling for proxy & remote endpoints multi-process: Forward PCI config space acceses to the remote process multi-process: add proxy communication functions multi-process: introduce proxy object multi-process: setup memory manager for remote device multi-process: Associate fd of a PCIDevice with its object multi-process: Initialize message handler in remote device multi-process: define MPQemuMsg format and transmission functions io: add qio_channel_readv_full_all_eof & qio_channel_readv_full_all helpers io: add qio_channel_writev_full_all helper multi-process: setup a machine object for remote device process multi-process: setup PCI host bridge for remote device multi-process: Add config option for multi-process QEMU memory: alloc RAM from file at offset multi-process: add configure and usage information ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/remote/memory.c')
-rw-r--r--hw/remote/memory.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/hw/remote/memory.c b/hw/remote/memory.c
new file mode 100644
index 0000000000..32085b1e05
--- /dev/null
+++ b/hw/remote/memory.c
@@ -0,0 +1,65 @@
+/*
+ * Memory manager for remote device
+ *
+ * Copyright © 2018, 2021 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+#include "hw/remote/memory.h"
+#include "exec/address-spaces.h"
+#include "exec/ram_addr.h"
+#include "qapi/error.h"
+
+static void remote_sysmem_reset(void)
+{
+ MemoryRegion *sysmem, *subregion, *next;
+
+ sysmem = get_system_memory();
+
+ QTAILQ_FOREACH_SAFE(subregion, &sysmem->subregions, subregions_link, next) {
+ if (subregion->ram) {
+ memory_region_del_subregion(sysmem, subregion);
+ object_unparent(OBJECT(subregion));
+ }
+ }
+}
+
+void remote_sysmem_reconfig(MPQemuMsg *msg, Error **errp)
+{
+ ERRP_GUARD();
+ SyncSysmemMsg *sysmem_info = &msg->data.sync_sysmem;
+ MemoryRegion *sysmem, *subregion;
+ static unsigned int suffix;
+ int region;
+
+ sysmem = get_system_memory();
+
+ remote_sysmem_reset();
+
+ for (region = 0; region < msg->num_fds; region++) {
+ g_autofree char *name;
+ subregion = g_new(MemoryRegion, 1);
+ name = g_strdup_printf("remote-mem-%u", suffix++);
+ memory_region_init_ram_from_fd(subregion, NULL,
+ name, sysmem_info->sizes[region],
+ true, msg->fds[region],
+ sysmem_info->offsets[region],
+ errp);
+
+ if (*errp) {
+ g_free(subregion);
+ remote_sysmem_reset();
+ return;
+ }
+
+ memory_region_add_subregion(sysmem, sysmem_info->gpas[region],
+ subregion);
+
+ }
+}