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Maxim Levitsky 4250160436 KVM: x86: don't expose MSR_IA32_UMWAIT_CONTROL unconditionally 
[ Upstream commit f4cfcd2d5a ]

This msr is only available when the host supports WAITPKG feature.

This breaks a nested guest, if the L1 hypervisor is set to ignore
unknown msrs, because the only other safety check that the
kernel does is that it attempts to read the msr and
rejects it if it gets an exception.

Cc: stable@vger.kernel.org
Fixes: 6e3ba4abce ("KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL")
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200523161455.3940-3-mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit f4cfcd2d5a
use boot_cpu_has for checking the feature)
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-18 19:20:21 +01:00
..
alpha
alpha: fix annotation of io{read,write}{16,32}be()
2020-08-26 10:40:58 +02:00
arc
ARC: stack unwinding: avoid indefinite looping
2020-11-10 12:37:33 +01:00
arm
ARM: dts: sun4i-a10: fix cpu_alert temperature
2020-11-10 12:37:29 +01:00
arm64
arm64: dts: marvell: espressobin: Add ethernet switch aliases
2020-11-10 12:37:34 +01:00
c6x
mm: consolidate pgtable_cache_init() and pgd_cache_init()
2019-09-24 15:54:09 -07:00
csky
csky: Fixup abiv2 syscall_trace break a4 & a5
2020-06-17 16:40:21 +02:00
h8300
mm: consolidate pgtable_cache_init() and pgd_cache_init()
2019-09-24 15:54:09 -07:00
hexagon
hexagon: define ioremap_uc
2020-05-10 10:31:31 +02:00
ia64
ia64: fix build error with !COREDUMP
2020-11-05 11:43:33 +01:00
m68k
m68k: q40: Fix info-leak in rtc_ioctl
2020-10-01 13:17:12 +02:00
microblaze
microblaze: Prevent the overflow of the start
2020-02-24 08:37:02 +01:00
mips
MIPS: DEC: Restore bootmem reservation for firmware working memory area
2020-11-05 11:43:30 +01:00
nds32
asm-generic/nds32: don't redefine cacheflush primitives
2020-01-17 19:48:43 +01:00
nios2
Merge tag 'nios2-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2
2019-09-27 13:02:19 -07:00
openrisc
openrisc: Fix issue with get_user for 64-bit values
2020-11-01 12:01:06 +01:00
parisc
kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables
2020-09-03 11:27:10 +02:00
powerpc
powerpc/eeh_cache: Fix a possible debugfs deadlock
2020-11-18 19:20:18 +01:00
riscv
riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
2020-11-05 11:43:17 +01:00
s390
s390/stp: add locking to sysfs functions
2020-11-05 11:43:30 +01:00
sh
sh: landisk: Add missing initialization of sh_io_port_base
2020-08-21 13:05:38 +02:00
sparc
sparc64: remove mm_cpumask clearing to fix kthread_use_mm race
2020-11-05 11:43:13 +01:00
um
um: change sigio_spinlock to a mutex
2020-11-05 11:43:14 +01:00
unicore32
mm: treewide: clarify pgtable_page_{ctor,dtor}() naming
2019-09-26 10:10:44 -07:00
x86
KVM: x86: don't expose MSR_IA32_UMWAIT_CONTROL unconditionally
2020-11-18 19:20:21 +01:00
xtensa
xtensa: fix system_call interaction with ptrace
2020-10-01 13:17:22 +02:00
.gitignore
…
Kconfig
mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
2020-11-05 11:43:13 +01:00