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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 20:50:09 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 20:50:09 +0300
commit245137cdf0cd92077dad37868fe4859c90dada36 (patch)
treede7b3718b7537a260148e99746f58e9de5819aa0 /drivers/virtio/virtio_mem.c
parent1c9077cdecd027714736e70704da432ee2b946bb (diff)
parentf685a533a7fab35c5d069dcd663f59c8e4171a75 (diff)
downloadlinux-245137cdf0cd92077dad37868fe4859c90dada36.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "118 patches: - The rest of MM. Includes kfence - another runtime memory validator. Not as thorough as KASAN, but it has unmeasurable overhead and is intended to be usable in production builds. - Everything else Subsystems affected by this patch series: alpha, procfs, sysctl, misc, core-kernel, MAINTAINERS, lib, bitops, checkpatch, init, coredump, seq_file, gdb, ubsan, initramfs, and mm (thp, cma, vmstat, memory-hotplug, mlock, rmap, zswap, zsmalloc, cleanups, kfence, kasan2, and pagemap2)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits) MIPS: make userspace mapping young by default initramfs: panic with memory information ubsan: remove overflow checks kgdb: fix to kill breakpoints on initmem after boot scripts/gdb: fix list_for_each x86: fix seq_file iteration for pat/memtype.c seq_file: document how per-entry resources are managed. fs/coredump: use kmap_local_page() init/Kconfig: fix a typo in CC_VERSION_TEXT help text init: clean up early_param_on_off() macro init/version.c: remove Version_<LINUX_VERSION_CODE> symbol checkpatch: do not apply "initialise globals to 0" check to BPF progs checkpatch: don't warn about colon termination in linker scripts checkpatch: add kmalloc_array_node to unnecessary OOM message check checkpatch: add warning for avoiding .L prefix symbols in assembly files checkpatch: improve TYPECAST_INT_CONSTANT test message checkpatch: prefer ftrace over function entry/exit printks checkpatch: trivial style fixes checkpatch: ignore warning designated initializers using NR_CPUS checkpatch: improve blank line after declaration test ...
Diffstat (limited to 'drivers/virtio/virtio_mem.c')
-rw-r--r--drivers/virtio/virtio_mem.c43
1 files changed, 28 insertions, 15 deletions
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 85a272c9978e..10ec60d81e84 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -623,7 +623,7 @@ static int virtio_mem_add_memory(struct virtio_mem *vm, uint64_t addr,
/* Memory might get onlined immediately. */
atomic64_add(size, &vm->offline_size);
rc = add_memory_driver_managed(vm->nid, addr, size, vm->resource_name,
- MEMHP_MERGE_RESOURCE);
+ MHP_MERGE_RESOURCE);
if (rc) {
atomic64_sub(size, &vm->offline_size);
dev_warn(&vm->vdev->dev, "adding memory failed: %d\n", rc);
@@ -2222,7 +2222,7 @@ static int virtio_mem_unplug_pending_mb(struct virtio_mem *vm)
*/
static void virtio_mem_refresh_config(struct virtio_mem *vm)
{
- const uint64_t phys_limit = 1UL << MAX_PHYSMEM_BITS;
+ const struct range pluggable_range = mhp_get_pluggable_range(true);
uint64_t new_plugged_size, usable_region_size, end_addr;
/* the plugged_size is just a reflection of what _we_ did previously */
@@ -2234,15 +2234,25 @@ 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 = vm->addr + usable_region_size;
- end_addr = min(end_addr, phys_limit);
+ end_addr = min(vm->addr + usable_region_size - 1,
+ pluggable_range.end);
- if (vm->in_sbm)
- vm->sbm.last_usable_mb_id =
- virtio_mem_phys_to_mb_id(end_addr) - 1;
- else
- vm->bbm.last_usable_bb_id =
- virtio_mem_phys_to_bb_id(vm, end_addr) - 1;
+ if (vm->in_sbm) {
+ vm->sbm.last_usable_mb_id = virtio_mem_phys_to_mb_id(end_addr);
+ if (!IS_ALIGNED(end_addr + 1, memory_block_size_bytes()))
+ vm->sbm.last_usable_mb_id--;
+ } else {
+ vm->bbm.last_usable_bb_id = virtio_mem_phys_to_bb_id(vm,
+ end_addr);
+ if (!IS_ALIGNED(end_addr + 1, vm->bbm.bb_size))
+ vm->bbm.last_usable_bb_id--;
+ }
+ /*
+ * If we cannot plug any of our device memory (e.g., nothing in the
+ * usable region is addressable), the last usable memory block id will
+ * be smaller than the first usable memory block id. We'll stop
+ * attempting to add memory with -ENOSPC from our main loop.
+ */
/* see if there is a request to change the size */
virtio_cread_le(vm->vdev, struct virtio_mem_config, requested_size,
@@ -2364,7 +2374,7 @@ static int virtio_mem_init_vq(struct virtio_mem *vm)
static int virtio_mem_init(struct virtio_mem *vm)
{
- const uint64_t phys_limit = 1UL << MAX_PHYSMEM_BITS;
+ const struct range pluggable_range = mhp_get_pluggable_range(true);
uint64_t sb_size, addr;
uint16_t node_id;
@@ -2405,9 +2415,10 @@ static int virtio_mem_init(struct virtio_mem *vm)
if (!IS_ALIGNED(vm->addr + vm->region_size, memory_block_size_bytes()))
dev_warn(&vm->vdev->dev,
"The alignment of the physical end address can make some memory unusable.\n");
- if (vm->addr + vm->region_size > phys_limit)
+ if (vm->addr < pluggable_range.start ||
+ vm->addr + vm->region_size - 1 > pluggable_range.end)
dev_warn(&vm->vdev->dev,
- "Some memory is not addressable. This can make some memory unusable.\n");
+ "Some device memory is not addressable/pluggable. This can make some memory unusable.\n");
/*
* We want subblocks to span at least MAX_ORDER_NR_PAGES and
@@ -2429,7 +2440,8 @@ static int virtio_mem_init(struct virtio_mem *vm)
vm->sbm.sb_size;
/* Round up to the next full memory block */
- addr = vm->addr + memory_block_size_bytes() - 1;
+ addr = max_t(uint64_t, vm->addr, pluggable_range.start) +
+ memory_block_size_bytes() - 1;
vm->sbm.first_mb_id = virtio_mem_phys_to_mb_id(addr);
vm->sbm.next_mb_id = vm->sbm.first_mb_id;
} else {
@@ -2450,7 +2462,8 @@ static int virtio_mem_init(struct virtio_mem *vm)
}
/* Round up to the next aligned big block */
- addr = vm->addr + vm->bbm.bb_size - 1;
+ addr = max_t(uint64_t, vm->addr, pluggable_range.start) +
+ vm->bbm.bb_size - 1;
vm->bbm.first_bb_id = virtio_mem_phys_to_bb_id(vm, addr);
vm->bbm.next_bb_id = vm->bbm.first_bb_id;
}