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Pawan Gupta e2a1256b17 x86/speculation: Restore speculation related MSRs during S3 resume 
After resuming from suspend-to-RAM, the MSRs that control CPU's
speculative execution behavior are not being restored on the boot CPU.

These MSRs are used to mitigate speculative execution vulnerabilities.
Not restoring them correctly may leave the CPU vulnerable.  Secondary
CPU's MSRs are correctly being restored at S3 resume by
identify_secondary_cpu().

During S3 resume, restore these MSRs for boot CPU when restoring its
processor state.

Fixes: 772439717d ("x86/bugs/intel: Set proper CPU features and setup RDS")
Reported-by: Neelima Krishnan <neelima.krishnan@intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Tested-by: Neelima Krishnan <neelima.krishnan@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2022-04-05 10:18:31 -07:00
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boot memcpy updates for v5.18-rc1 2022-03-26 12:19:04 -07:00
coco
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configs x86/config: Make the x86 defconfigs a bit more usable 2022-03-27 20:58:35 +02:00
crypto This push fixes the following issues: 2022-03-31 11:17:39 -07:00
entry Kbuild updates for v5.18 2022-03-31 11:59:03 -07:00
events asm-generic updates for 5.18 2022-03-23 18:03:08 -07:00
hyperv
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ia32
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include * Only do MSR filtering for MSRs accessed by rdmsr/wrmsr 2022-04-02 12:09:02 -07:00
kernel A set of x86 fixes and updates: 2022-04-03 12:15:47 -07:00
kvm * Only do MSR filtering for MSRs accessed by rdmsr/wrmsr 2022-04-02 12:09:02 -07:00
lib A set of x86 fixes and updates: 2022-04-03 12:15:47 -07:00
math-emu
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mm ptrace: Cleanups for v5.18 2022-03-28 17:29:53 -07:00
net Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a 2022-03-27 10:17:23 -07:00
pci
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platform
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power x86/speculation: Restore speculation related MSRs during S3 resume 2022-04-05 10:18:31 -07:00
purgatory
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ras
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realmode
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tools
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um Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2022-04-01 19:57:03 -07:00
video
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xen xen: branch for v5.18-rc1 2022-03-28 14:32:39 -07:00
.gitignore
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Kbuild
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Kconfig Revert the RT related signal changes. They need to be reworked and 2022-04-03 12:08:26 -07:00
Kconfig.assembler
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Kconfig.cpu
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Kconfig.debug
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Makefile
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Makefile.um
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Makefile_32.cpu
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