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| author | Paolo Bonzini <pbonzini@redhat.com> | 2025-12-02 18:58:47 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-12-02 18:58:47 +0100 |
| commit | e0c26d47def7382d7dbd9cad58bc653aed75737a (patch) | |
| tree | 6099913d0882a0dea20f4ceea7092f856e9b786b /Documentation/virt | |
| parent | f58e70cc31e3109b4f81688c74146702b05199c7 (diff) | |
| parent | 2bd1337a1295e012e60008ee21a64375e5234e12 (diff) | |
| download | linux-next-e0c26d47def7382d7dbd9cad58bc653aed75737a.tar.gz linux-next-e0c26d47def7382d7dbd9cad58bc653aed75737a.zip | |
Merge tag 'kvm-s390-next-6.19-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
- SCA rework
- VIRT_XFER_TO_GUEST_WORK support
- Operation exception forwarding support
- Cleanups
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index f38a0cfcbec5..01a3abef8abb 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -7855,7 +7855,7 @@ where 0xff represents CPUs 0-7 in cluster 0. :Architectures: s390 :Parameters: none -With this capability enabled, all illegal instructions 0x0000 (2 bytes) will +With this capability enabled, the illegal instruction 0x0000 (2 bytes) will be intercepted and forwarded to user space. User space can use this mechanism e.g. to realize 2-byte software breakpoints. The kernel will not inject an operating exception for these instructions, user space has @@ -8727,7 +8727,7 @@ given VM. When this capability is enabled, KVM resets the VCPU when setting MP_STATE_INIT_RECEIVED through IOCTL. The original MP_STATE is preserved. -7.43 KVM_CAP_ARM_CACHEABLE_PFNMAP_SUPPORTED +7.44 KVM_CAP_ARM_CACHEABLE_PFNMAP_SUPPORTED ------------------------------------------- :Architectures: arm64 @@ -8750,6 +8750,21 @@ When this capability is enabled, KVM may exit to userspace for SEAs taken to EL2 resulting from a guest access. See ``KVM_EXIT_ARM_SEA`` for more information. +7.46 KVM_CAP_S390_USER_OPEREXEC +------------------------------- + +:Architectures: s390 +:Parameters: none + +When this capability is enabled KVM forwards all operation exceptions +that it doesn't handle itself to user space. This also includes the +0x0000 instructions managed by KVM_CAP_S390_USER_INSTR0. This is +helpful if user space wants to emulate instructions which are not +(yet) implemented in hardware. + +This capability can be enabled dynamically even if VCPUs were already +created and are running. + 8. Other capabilities. ====================== |