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| author | David Hildenbrand <david@redhat.com> | 2020-11-12 16:37:58 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-12-19 00:14:26 +0300 |
| commit | 8464e3bdf208e86410e369601ca363b2a81683e3 (patch) | |
| tree | 9e008c988209d3e4cff05ecc26939f700e6b6fca /drivers/virtio | |
| parent | 989ff82527074b79bc89ba1c390be1eda01784a5 (diff) | |
| download | linux-8464e3bdf208e86410e369601ca363b2a81683e3.tar.xz | |
virtio-mem: generalize virtio_mem_owned_mb()
Avoid using memory block ids. Rename it to virtio_mem_contains_range().
This is a preparation for Big Block Mode (BBM).
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20201112133815.13332-13-david@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_mem.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 3731097cd9e8..2193c5172195 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -512,12 +512,13 @@ static bool virtio_mem_overlaps_range(struct virtio_mem *vm, } /* - * Test if a virtio-mem device owns a memory block. Can be called from + * Test if a virtio-mem device contains a given range. Can be called from * (notifier) callbacks lockless. */ -static bool virtio_mem_owned_mb(struct virtio_mem *vm, unsigned long mb_id) +static bool virtio_mem_contains_range(struct virtio_mem *vm, uint64_t start, + uint64_t size) { - return mb_id >= vm->first_mb_id && mb_id <= vm->last_mb_id; + return start >= vm->addr && start + size <= vm->addr + vm->region_size; } static int virtio_mem_notify_going_online(struct virtio_mem *vm, @@ -871,7 +872,7 @@ static void virtio_mem_online_page_cb(struct page *page, unsigned int order) */ rcu_read_lock(); list_for_each_entry_rcu(vm, &virtio_mem_devices, next) { - if (!virtio_mem_owned_mb(vm, mb_id)) + if (!virtio_mem_contains_range(vm, addr, PFN_PHYS(1 << order))) continue; sb_id = virtio_mem_phys_to_sb_id(vm, addr); |