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2259da159f
mirror_ubuntu-kernels/arch/x86/kernel/cpu
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Thadeu Lima de Souza Cascardo 2259da159f x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported 
There are some VM configurations which have Skylake model but do not
support IBPB. In those cases, when using retbleed=ibpb, userspace is going
to be killed and kernel is going to panic.

If the CPU does not support IBPB, warn and proceed with the auto option. Also,
do not fallback to IBPB on AMD/Hygon systems if it is not supported.

Fixes: 3ebc170068 ("x86/bugs: Add retbleed=ibpb")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
2022-07-08 12:50:52 +02:00
..
mce libnvdimm for 5.19 2022-05-27 15:49:30 -07:00
microcode x86/microcode: Remove unnecessary perf callback 2022-05-31 09:31:19 +02:00
mtrr x86/mtrr: Replace deprecated CPU-hotplug functions. 2021-08-10 14:46:27 +02:00
resctrl x86: Replace cpumask_weight() with cpumask_empty() where appropriate 2022-04-10 22:35:38 +02:00
sgx x86/sgx: Set active memcg prior to shmem allocation 2022-06-02 10:58:47 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
acrn.c x86/acrn: Introduce acrn_cpuid_base() and hypervisor feature bits 2021-02-09 10:58:18 +01:00
amd.c x86/retbleed: Add fine grained Kconfig knobs 2022-06-29 17:43:41 +02:00
aperfmperf.c x86/aperfmperf: Integrate the fallback code from show_cpuinfo() 2022-04-27 20:22:20 +02:00
bugs.c x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported 2022-07-08 12:50:52 +02:00
cacheinfo.c sched: Add cluster scheduler level for x86 2021-10-15 11:25:16 +02:00
centaur.c x86/cpu/centaur: Add Centaur family >=7 CPUs initialization support 2020-09-11 10:53:19 +02:00
common.c x86/bugs: Add Cannon lake to RETBleed affected CPU list 2022-07-07 12:33:53 +02:00
cpu.h x86/cpu/amd: Add Spectral Chicken 2022-06-27 10:34:00 +02:00
cpuid-deps.c x86/fpu: Optimize out sigframe xfeatures when in init state 2021-11-03 22:42:35 +01:00
cyrix.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
feat_ctl.c x86/cpu/intel: Allow SGX virtualization without Launch Control support 2021-04-06 09:43:41 +02:00
hygon.c x86/cpu/amd: Add Spectral Chicken 2022-06-27 10:34:00 +02:00
hypervisor.c x86/paravirt: Remove const mark from x86_hyper_xen_hvm variable 2019-07-17 08:09:59 +02:00
intel_epb.c x86: intel_epb: Allow model specific normal EPB value 2022-01-04 16:37:23 +01:00
intel_pconfig.c
intel.c platform-drivers-x86 for v5.19-1 2022-05-23 20:38:39 -07:00
Makefile x86/CPU: Add support for Vortex CPUs 2021-10-21 15:49:07 +02:00
match.c x86/cpu: Add a steppings field to struct x86_cpu_id 2020-04-20 12:19:21 +02:00
mkcapflags.sh x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* 2020-01-13 18:36:02 +01:00
mshyperv.c hyperv-next for 5.19 2022-05-28 11:39:01 -07:00
perfctr-watchdog.c x86/nmi_watchdog: Fix old-style NMI watchdog regression on old Intel CPUs 2021-06-10 10:04:40 +02:00
powerflags.c
proc.c x86/aperfmperf: Integrate the fallback code from show_cpuinfo() 2022-04-27 20:22:20 +02:00
rdrand.c x86/rdrand: Sanity-check RDRAND output 2019-10-01 19:55:32 +02:00
scattered.c x86/cpufeatures: Add PerfMonV2 feature bit 2022-05-04 11:17:15 +02:00
topology.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
transmeta.c
tsx.c x86/tsx: Disable TSX development mode at boot 2022-04-11 09:58:40 +02:00
umc.c
umwait.c KVM: VMX: Stop context switching MSR_IA32_UMWAIT_CONTROL 2020-06-22 20:54:57 -04:00
vmware.c Have vmware guests skip the refined TSC calibration when the TSC 2021-04-26 09:13:43 -07:00
vortex.c x86/CPU: Add support for Vortex CPUs 2021-10-21 15:49:07 +02:00
zhaoxin.c x86/cpu: Reinitialize IA32_FEAT_CTL MSR on BSP during wakeup 2020-06-15 14:18:37 +02:00