AuxXxilium/linux_dsm_epyc7002
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e6d8eb6553
linux_dsm_epyc7002/arch/x86
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Paolo Bonzini e6d8eb6553 KVM: SVM: ensure that EFER.SVME is set when running nested guest or on nested vmexit 
commit 3c346c0c60ab06a021d1c0884a0ef494bc4ee3a7 upstream.

Fixing nested_vmcb_check_save to avoid all TOC/TOU races
is a bit harder in released kernels, so do the bare minimum
by avoiding that EFER.SVME is cleared.  This is problematic
because svm_set_efer frees the data structures for nested
virtualization if EFER.SVME is cleared.

Also check that EFER.SVME remains set after a nested vmexit;
clearing it could happen if the bit is zero in the save area
that is passed to KVM_SET_NESTED_STATE (the save area of the
nested state corresponds to the nested hypervisor's state
and is restored on the next nested vmexit).

Cc: stable@vger.kernel.org
Fixes: 2fcf4876ad ("KVM: nSVM: implement on demand allocation of the nested state")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-04-07 15:00:09 +02:00
..
boot A set of fixes for x86: 2020-12-06 11:22:39 -08:00
configs
crypto crypto: x86/aes-ni-xts - use direct calls to and 4-way stride 2021-03-20 10:43:43 +01:00
entry x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls 2021-03-17 17:06:36 +01:00
events perf/x86/intel: Fix unchecked MSR access error caused by VLBR_EVENT 2021-03-25 09:04:16 +01:00
hyperv x86/hyperv: Fix kexec panic/hang issues 2021-01-27 11:54:57 +01:00
ia32
include ACPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead() 2021-04-07 15:00:08 +02:00
kernel ACPI: processor: Fix CPU0 wakeup in acpi_idle_play_dead() 2021-04-07 15:00:08 +02:00
kvm KVM: SVM: ensure that EFER.SVME is set when running nested guest or on nested vmexit 2021-04-07 15:00:09 +02:00
lib x86/sev-es: Use __copy_from_user_inatomic() 2021-03-17 17:06:36 +01:00
math-emu
mm x86/mem_encrypt: Correct physical address calculation in __set_clr_pte_enc() 2021-03-30 14:32:07 +02:00
net bpf: Fix fexit trampoline. 2021-04-07 15:00:03 +02:00
oprofile
pci x86/pci: Create PCI/MSI irqdomain after x86_init.pci.arch_init() 2021-02-17 11:02:28 +01:00
platform x86/efi: Remove EFI PGD build time checks 2021-02-17 11:02:24 +01:00
power
purgatory treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
ras
realmode
tools x86/build: Treat R_386_PLT32 relocation as R_386_PC32 2021-03-07 12:34:04 +01:00
um arch/um: partially revert the conversion to __section() macro 2020-10-26 15:39:37 -07:00
video
xen Revert "xen: fix p2m size in dom0 for disabled memory hotplug case" 2021-03-30 14:32:08 +02:00
.gitignore
Kbuild
Kconfig fanotify: Fix sys_fanotify_mark() on native x86-32 2021-01-17 14:16:59 +01:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug
Makefile x86/build: Disable CET instrumentation in the kernel for 32-bit too 2021-02-17 11:02:27 +01:00
Makefile_32.cpu
Makefile.um