Vitaly Kuznetsov c6617c61e8 KVM: x86: Partially allow KVM_SET_CPUID{,2} after KVM_RUN ... Commit feb627e8d6 ("KVM: x86: Forbid KVM_SET_CPUID{,2} after KVM_RUN") forbade changing CPUID altogether but unfortunately this is not fully compatible with existing VMMs. In particular, QEMU reuses vCPU fds for CPU hotplug after unplug and it calls KVM_SET_CPUID2. Instead of full ban, check whether the supplied CPUID data is equal to what was previously set. Reported-by: Igor Mammedov <imammedo@redhat.com> Fixes: feb627e8d6 ("KVM: x86: Forbid KVM_SET_CPUID{,2} after KVM_RUN") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20220117150542.2176196-3-vkuznets@redhat.com> Cc: stable@vger.kernel.org [Do not call kvm_find_cpuid_entry repeatedly. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2022-01-17 12:29:41 -05:00
..
alpha
arc
arm
arm64	KVM/arm64 updates for Linux 5.16	2022-01-07 10:42:19 -05:00
csky
h8300
hexagon
ia64
m68k
microblaze
mips	KVM: mips: Use Makefile.kvm for common files	2021-12-09 12:58:37 -05:00
nds32
nios2
openrisc
parisc
powerpc	Merge branch 'topic/ppc-kvm' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux into HEAD	2021-12-19 15:27:21 +01:00
riscv	KVM: RISC-V: Avoid spurious virtual interrupts after clearing hideleg CSR	2022-01-06 15:18:18 +05:30
s390	KVM: s390: Fix and cleanup	2021-12-21 12:59:53 -05:00
sh
sparc
um
x86	KVM: x86: Partially allow KVM_SET_CPUID{,2} after KVM_RUN	2022-01-17 12:29:41 -05:00
xtensa
.gitignore
Kconfig