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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 05:11:21 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 05:11:21 -0400 |
| commit | 1644e270592001f47572c70106d618283ece1ef6 (patch) | |
| tree | c5ed7985594f91c1d50426779aa7c305fd861d10 /Documentation/virt | |
| parent | Merge tag 'kvm-riscv-5.19-1' of https://github.com/kvm-riscv/linux into HEAD (diff) | |
| parent | KVM: s390: selftest: Test suppression indication on key prot exception (diff) | |
| download | linux-dev-1644e270592001f47572c70106d618283ece1ef6.tar.xz linux-dev-1644e270592001f47572c70106d618283ece1ef6.zip | |
Merge tag 'kvm-s390-next-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
KVM: s390: Fix and feature for 5.19
- ultravisor communication device driver
- fix TEID on terminating storage key ops
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index f9016fbb6b20..d10d40867540 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -3814,12 +3814,18 @@ in case of KVM_S390_MEMOP_F_CHECK_ONLY), the ioctl returns a positive error number indicating the type of exception. This exception is also raised directly at the corresponding VCPU if the flag KVM_S390_MEMOP_F_INJECT_EXCEPTION is set. +On protection exceptions, unless specified otherwise, the injected +translation-exception identifier (TEID) indicates suppression. If the KVM_S390_MEMOP_F_SKEY_PROTECTION flag is set, storage key protection is also in effect and may cause exceptions if accesses are prohibited given the access key designated by "key"; the valid range is 0..15. KVM_S390_MEMOP_F_SKEY_PROTECTION is available if KVM_CAP_S390_MEM_OP_EXTENSION is > 0. +Since the accessed memory may span multiple pages and those pages might have +different storage keys, it is possible that a protection exception occurs +after memory has been modified. In this case, if the exception is injected, +the TEID does not indicate suppression. Absolute read/write: ^^^^^^^^^^^^^^^^^^^^ |