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[PATCH v1 11/13] util: vfio-helpers: Implement ram_block_resized()
From: |
David Hildenbrand |
Subject: |
[PATCH v1 11/13] util: vfio-helpers: Implement ram_block_resized() |
Date: |
Mon, 3 Feb 2020 19:31:23 +0100 |
Let's implement ram_block_resized().
Note: Resizing is currently only allowed during reboot or when migration
starts.
Cc: "Dr. David Alan Gilbert" <address@hidden>
Cc: Paolo Bonzini <address@hidden>
Cc: Markus Armbruster <address@hidden>
Cc: Alex Williamson <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
---
util/vfio-helpers.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index 71e02e7f35..57d77e9480 100644
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -395,11 +395,24 @@ static void qemu_vfio_ram_block_removed(RAMBlockNotifier
*n,
}
}
+static void qemu_vfio_ram_block_resized(RAMBlockNotifier *n, void *host,
+ size_t oldsize, size_t newsize)
+{
+ QEMUVFIOState *s = container_of(n, QEMUVFIOState, ram_notifier);
+ if (host) {
+ trace_qemu_vfio_ram_block_resized(s, host, oldsize, newsize);
+ /* Note: Not atomic - we need a new ioctl for that. */
+ qemu_vfio_ram_block_removed(n, host, oldsize);
+ qemu_vfio_ram_block_added(n, host, newsize);
+ }
+}
+
static void qemu_vfio_open_common(QEMUVFIOState *s)
{
qemu_mutex_init(&s->lock);
s->ram_notifier.ram_block_added = qemu_vfio_ram_block_added;
s->ram_notifier.ram_block_removed = qemu_vfio_ram_block_removed;
+ s->ram_notifier.ram_block_resized = qemu_vfio_ram_block_resized;
s->low_water_mark = QEMU_VFIO_IOVA_MIN;
s->high_water_mark = QEMU_VFIO_IOVA_MAX;
ram_block_notifier_add(&s->ram_notifier);
--
2.24.1
[PATCH v1 11/13] util: vfio-helpers: Implement ram_block_resized(),
David Hildenbrand <=
[PATCH v1 12/13] util: oslib: Resizable anonymous allocations under POSIX, David Hildenbrand, 2020/02/03
[PATCH v1 06/13] util/mmap-alloc: Factor out reserving of a memory region to mmap_reserve(), David Hildenbrand, 2020/02/03
[PATCH v1 13/13] exec: Ram blocks with resizable anonymous allocations under POSIX, David Hildenbrand, 2020/02/03
Re: [PATCH v1 00/13] Ram blocks with resizable anonymous allocations under POSIX, Michael S. Tsirkin, 2020/02/06