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Tom Lendacky ce7ea0cfdc KVM: SVM: Move GHCB unmapping to fix RCU warning 
When an SEV-ES guest is running, the GHCB is unmapped as part of the
vCPU run support. However, kvm_vcpu_unmap() triggers an RCU dereference
warning with CONFIG_PROVE_LOCKING=y because the SRCU lock is released
before invoking the vCPU run support.

Move the GHCB unmapping into the prepare_guest_switch callback, which is
invoked while still holding the SRCU lock, eliminating the RCU dereference
warning.

Fixes: 291bd20d5d ("KVM: SVM: Add initial support for a VMGEXIT VMEXIT")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <b2f9b79d15166f2c3e4375c0d9bc3268b7696455.1620332081.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-05-07 06:06:23 -04:00
..
boot - turn the stack canary into a normal __percpu variable on 32-bit which 2021-04-27 17:45:09 -07:00
configs module: remove EXPORT_UNUSED_SYMBOL* 2021-02-08 12:28:07 +01:00
crypto Objtool updates in this cycle were: 2021-04-28 12:53:24 -07:00
entry Add Landlock, a new LSM from Mickaël Salaün <mic@linux.microsoft.com> 2021-05-01 18:50:44 -07:00
events IOMMU Updates for Linux v5.13 2021-05-01 09:33:00 -07:00
hyperv The x86 MM changes in this cycle were: 2021-04-29 11:41:43 -07:00
ia32 x86/ia32_signal: Propagate __user annotation properly 2020-12-11 19:44:31 +01:00
include KVM: x86: Prevent KVM SVM from loading on kernels with 5-level paging 2021-05-07 06:06:21 -04:00
kernel x86/kvm: Unify kvm_pv_guest_cpu_reboot() with kvm_guest_cpu_offline() 2021-05-07 06:06:11 -04:00
kvm KVM: SVM: Move GHCB unmapping to fix RCU warning 2021-05-07 06:06:23 -04:00
lib - turn the stack canary into a normal __percpu variable on 32-bit which 2021-04-27 17:45:09 -07:00
math-emu x86/fpu/math-emu: Fix function cast warning 2021-03-23 00:08:02 +01:00
mm ARM: 2021-05-01 10:14:08 -07:00
net Networking changes for 5.13. 2021-04-29 11:57:23 -07:00
pci x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
platform - turn the stack canary into a normal __percpu variable on 32-bit which 2021-04-27 17:45:09 -07:00
power - turn the stack canary into a normal __percpu variable on 32-bit which 2021-04-27 17:45:09 -07:00
purgatory crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
ras
realmode x86: Fix various typos in comments, take #2 2021-03-21 23:50:28 +01:00
tools x86/tools/insn_sanity: Convert to insn_decode() 2021-03-15 12:21:11 +01:00
um um: remove process stub VMA 2021-02-12 21:37:38 +01:00
video
xen The x86 MM changes in this cycle were: 2021-04-29 11:41:43 -07:00
.gitignore
Kbuild
Kconfig mm/memtest: add ARCH_USE_MEMTEST 2021-04-30 11:20:36 -07:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug
Makefile Kbuild updates for v5.13 2021-04-29 14:24:39 -07:00
Makefile.um
Makefile_32.cpu