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| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-16 09:51:36 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-07-16 09:51:36 -0400 |
| commit | 86014c1e20fa1b5d5c6968f37fdd2f1b6c94d519 (patch) | |
| tree | ef455cd218aa2009e04dd5a73e7d55dfa8ac009e /Documentation/virt | |
| parent | f4501e8bc88db2548b37afe100506358f1bf7504 (diff) | |
| parent | 25bc6af60f6121071ab4aa924a24cf6011125614 (diff) | |
Merge tag 'kvm-x86-generic-6.11' of https://github.com/kvm-x86/linux into HEAD
KVM generic changes for 6.11
- Enable halt poll shrinking by default, as Intel found it to be a clear win.
- Setup empty IRQ routing when creating a VM to avoid having to synchronize
SRCU when creating a split IRQCHIP on x86.
- Rework the sched_in/out() paths to replace kvm_arch_sched_in() with a flag
that arch code can use for hooking both sched_in() and sched_out().
- Take the vCPU @id as an "unsigned long" instead of "u32" to avoid
truncating a bogus value from userspace, e.g. to help userspace detect bugs.
- Mark a vCPU as preempted if and only if it's scheduled out while in the
KVM_RUN loop, e.g. to avoid marking it preempted and thus writing guest
memory when retrieving guest state during live migration blackout.
- A few minor cleanups
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 8 | ||||
| -rw-r--r-- | Documentation/virt/kvm/halt-polling.rst | 12 |
2 files changed, 10 insertions, 10 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 172cec187fc1..6ef7a08b745f 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -7969,10 +7969,10 @@ perform a bulk copy of tags to/from the guest. 7.29 KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM ------------------------------------- -Architectures: x86 SEV enabled -Type: vm -Parameters: args[0] is the fd of the source vm -Returns: 0 on success +:Architectures: x86 SEV enabled +:Type: vm +:Parameters: args[0] is the fd of the source vm +:Returns: 0 on success This capability enables userspace to migrate the encryption context from the VM indicated by the fd to the VM this is called on. diff --git a/Documentation/virt/kvm/halt-polling.rst b/Documentation/virt/kvm/halt-polling.rst index c82a04b709b4..a6790a67e205 100644 --- a/Documentation/virt/kvm/halt-polling.rst +++ b/Documentation/virt/kvm/halt-polling.rst @@ -79,11 +79,11 @@ adjustment of the polling interval. Module Parameters ================= -The kvm module has 3 tuneable module parameters to adjust the global max -polling interval as well as the rate at which the polling interval is grown and -shrunk. These variables are defined in include/linux/kvm_host.h and as module -parameters in virt/kvm/kvm_main.c, or arch/powerpc/kvm/book3s_hv.c in the -powerpc kvm-hv case. +The kvm module has 4 tunable module parameters to adjust the global max polling +interval, the initial value (to grow from 0), and the rate at which the polling +interval is grown and shrunk. These variables are defined in +include/linux/kvm_host.h and as module parameters in virt/kvm/kvm_main.c, or +arch/powerpc/kvm/book3s_hv.c in the powerpc kvm-hv case. +-----------------------+---------------------------+-------------------------+ |Module Parameter | Description | Default Value | @@ -105,7 +105,7 @@ powerpc kvm-hv case. | | grow_halt_poll_ns() | | | | function. | | +-----------------------+---------------------------+-------------------------+ -|halt_poll_ns_shrink | The value by which the | 0 | +|halt_poll_ns_shrink | The value by which the | 2 | | | halt polling interval is | | | | divided in the | | | | shrink_halt_poll_ns() | | |