2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
linux-next/Documentation/virtual/kvm
Aravinda Prasad 134764ed6e KVM: PPC: Book3S HV: Add new capability to control MCE behaviour
This introduces a new KVM capability to control how KVM behaves
on machine check exception (MCE) in HV KVM guests.

If this capability has not been enabled, KVM redirects machine check
exceptions to guest's 0x200 vector, if the address in error belongs to
the guest. With this capability enabled, KVM will cause a guest exit
with the exit reason indicating an NMI.

The new capability is required to avoid problems if a new kernel/KVM
is used with an old QEMU, running a guest that doesn't issue
"ibm,nmi-register".  As old QEMU does not understand the NMI exit
type, it treats it as a fatal error.  However, the guest could have
handled the machine check error if the exception was delivered to
guest's 0x200 interrupt vector instead of NMI exit in case of old
QEMU.

[paulus@ozlabs.org - Reworded the commit message to be clearer,
 enable only on HV KVM.]

Signed-off-by: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2017-06-21 13:37:08 +10:00
..
arm arm/arm64: Add hyp-stub API documentation 2017-04-09 07:49:36 -07:00
devices Second round of KVM/ARM Changes for v4.12. 2017-05-09 12:51:49 +02:00
00-INDEX KVM: Add halt polling documentation 2016-11-28 11:48:47 +11:00
api.txt KVM: PPC: Book3S HV: Add new capability to control MCE behaviour 2017-06-21 13:37:08 +10:00
cpuid.txt Documentation/kvm: Update cpuid documentation for steal time and pv eoi 2013-09-24 19:12:16 +02:00
halt-polling.txt KVM: Add halt polling documentation 2016-11-28 11:48:47 +11:00
hypercalls.txt KVM: MIPS: Implement HYPCALL emulation 2017-03-28 14:53:33 +01:00
locking.txt kvm: x86: mmu: Update documentation for fast page fault mechanism 2017-01-09 14:46:12 +01:00
mmu.txt One of the largest releases for KVM... Hardly any generic improvement, 2016-03-16 09:55:35 -07:00
msr.txt Documentation/virtual/kvm: Support the vCPU preemption check 2016-11-22 12:48:09 +01:00
nested-vmx.txt KVM: nVMX: Documentation 2011-07-12 13:15:22 +03:00
ppc-pv.txt Doc:kvm: Fix typo in Doc/virtual/kvm 2015-10-11 15:35:23 -06:00
review-checklist.txt docs: fix locations of several documents that got moved 2016-10-24 08:12:35 -02:00
s390-diag.txt KVM: s390: add documentation for diag 501 2014-04-22 13:24:51 +02:00
timekeeping.txt KVM: doc: Fix typo in doc/virtual/kvm 2013-12-31 17:24:54 -02:00