diff options
| author |   David Hildenbrand <david@redhat.com> | 2024-12-04 13:54:41 +0100 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2025-01-27 09:39:25 -0500 |
| commit | fe1d79dc54ac4f599a8739e4e6f6082ea5629006 (patch) | |
| tree | ea3cd02ea8a8cfd48b840351d7ac2097387a79b5 | |
| parent | virtio-mem: mark device ready before registering callbacks in kdump mode (diff) | |
| download | wireguard-linux-fe1d79dc54ac4f599a8739e4e6f6082ea5629006.tar.xz wireguard-linux-fe1d79dc54ac4f599a8739e4e6f6082ea5629006.zip | |
virtio-mem: remember usable region size
Let's remember the usable region size, which will be helpful in kdump
mode next.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20241204125444.1734652-11-david@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/virtio/virtio_mem.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 126f1d669bb0..73477d5b79cf 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -133,6 +133,8 @@ struct virtio_mem { uint64_t addr; /* Maximum region size in bytes. */ uint64_t region_size; + /* Usable region size in bytes. */ + uint64_t usable_region_size; /* The parent resource for all memory added via this device. */ struct resource *parent_resource; @@ -2368,7 +2370,7 @@ static int virtio_mem_cleanup_pending_mb(struct virtio_mem *vm) static void virtio_mem_refresh_config(struct virtio_mem *vm) { const struct range pluggable_range = mhp_get_pluggable_range(true); - uint64_t new_plugged_size, usable_region_size, end_addr; + uint64_t new_plugged_size, end_addr; /* the plugged_size is just a reflection of what _we_ did previously */ virtio_cread_le(vm->vdev, struct virtio_mem_config, plugged_size, @@ -2378,8 +2380,8 @@ static void virtio_mem_refresh_config(struct virtio_mem *vm) /* calculate the last usable memory block id */ virtio_cread_le(vm->vdev, struct virtio_mem_config, - usable_region_size, &usable_region_size); - end_addr = min(vm->addr + usable_region_size - 1, + usable_region_size, &vm->usable_region_size); + end_addr = min(vm->addr + vm->usable_region_size - 1, pluggable_range.end); if (vm->in_sbm) { @@ -2763,6 +2765,8 @@ static int virtio_mem_init(struct virtio_mem *vm) virtio_cread_le(vm->vdev, struct virtio_mem_config, addr, &vm->addr); virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size, &vm->region_size); + virtio_cread_le(vm->vdev, struct virtio_mem_config, usable_region_size, + &vm->usable_region_size); /* Determine the nid for the device based on the lowest address. */ if (vm->nid == NUMA_NO_NODE) |