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virtio-mem: generalize virtio_mem_owned_mb()

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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>
This commit is contained in:
David Hildenbrand 2020-11-12 14:37:58 +01:00 committed by Michael S. Tsirkin
parent 989ff82527
commit 8464e3bdf2
1 changed files with 5 additions and 4 deletions
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9
drivers/virtio/virtio_mem.c
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@ -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);