diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-01-10 16:20:19 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-01-14 17:36:15 -0800 |
| commit | d131f0042f466d558f7b75af5e100b62a91a5803 (patch) | |
| tree | 9c79c5c70299b1d73005d95c1555d9d5c6a1fc0e /virt | |
| parent | f81a6d12bf8b262f4c8ce5e856a4d399d97612ee (diff) | |
KVM: Assert slots_lock is held when setting memory regions
Add proper lockdep assertions in __kvm_set_memory_region() and
__x86_set_memory_region() instead of relying comments.
Opportunistically delete __kvm_set_memory_region()'s entire function
comment as the API doesn't allocate memory or select a gfn, and the
"mostly for framebuffers" comment hasn't been true for a very long time.
Cc: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Link: https://lore.kernel.org/r/20250111002022.1230573-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index eb3d0a385077..7d25b50cb298 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1926,14 +1926,6 @@ static bool kvm_check_memslot_overlap(struct kvm_memslots *slots, int id, return false; } -/* - * Allocate some memory and give it an address in the guest physical address - * space. - * - * Discontiguous memory is allowed, mostly for framebuffers. - * - * Must be called holding kvm->slots_lock for write. - */ int __kvm_set_memory_region(struct kvm *kvm, const struct kvm_userspace_memory_region2 *mem) { @@ -1945,6 +1937,8 @@ int __kvm_set_memory_region(struct kvm *kvm, int as_id, id; int r; + lockdep_assert_held(&kvm->slots_lock); + r = check_memory_region_flags(kvm, mem); if (r) return r; |