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KVM: x86: Support for disabling quirks

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Introducing KVM_CAP_DISABLE_QUIRKS for disabling x86 quirks that were previous
created in order to overcome QEMU issues. Those issue were mostly result of
invalid VM BIOS.  Currently there are two quirks that can be disabled:

1. KVM_QUIRK_LINT0_REENABLED - LINT0 was enabled after boot
2. KVM_QUIRK_CD_NW_CLEARED - CD and NW are cleared after boot

These two issues are already resolved in recent releases of QEMU, and would
therefore be disabled by QEMU.

Signed-off-by: Nadav Amit <[email protected]>
Message-Id: <[email protected]>
[Report capability from KVM_CHECK_EXTENSION too. - Paolo]
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Nadav Amit 2015-04-13 01:53:41 +03:00 • committed by Paolo Bonzini
commit 90de4a1875
7 changed files with 43 additions and 4 deletions
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3
Documentation/virtual/kvm/api.txt
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@ -959,7 +959,8 @@ documentation when it pops into existence).
4.37 KVM_ENABLE_CAP
Capability: KVM_CAP_ENABLE_CAP, KVM_CAP_ENABLE_CAP_VM
Architectures: ppc, s390
Architectures: x86 (only KVM_CAP_ENABLE_CAP_VM),
mips (only KVM_CAP_ENABLE_CAP), ppc, s390
Type: vcpu ioctl, vm ioctl (with KVM_CAP_ENABLE_CAP_VM)
Parameters: struct kvm_enable_cap (in)
Returns: 0 on success; -1 on error