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author | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-28 21:34:47 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-28 21:34:47 +0300 |
commit | 1e79a9e3ab96ecf8dbb8b6d237b3ae824bd79074 (patch) | |
tree | 60e5967053f62461b983d0fe45fe5786805c6327 /arch/s390/kernel/uv.c | |
parent | 29c46979b25d5ca867e9859bfdd088d028739cdf (diff) | |
parent | 99b63f55dc514a357c2ecf25e9aab149879329f0 (diff) | |
download | linux-1e79a9e3ab96ecf8dbb8b6d237b3ae824bd79074.tar.xz |
Merge tag 'kvm-s390-next-6.2-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
- Second batch of the lazy destroy patches
- First batch of KVM changes for kernel virtual != physical address support
- Removal of a unused function
Diffstat (limited to 'arch/s390/kernel/uv.c')
-rw-r--r-- | arch/s390/kernel/uv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index f9810d2a267c..9f18a4af9c13 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -255,6 +255,13 @@ static int make_secure_pte(pte_t *ptep, unsigned long addr, */ static bool should_export_before_import(struct uv_cb_header *uvcb, struct mm_struct *mm) { + /* + * The misc feature indicates, among other things, that importing a + * shared page from a different protected VM will automatically also + * transfer its ownership. + */ + if (test_bit_inv(BIT_UV_FEAT_MISC, &uv_info.uv_feature_indications)) + return false; if (uvcb->cmd == UVC_CMD_UNPIN_PAGE_SHARED) return false; return atomic_read(&mm->context.protected_count) > 1; |