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Yuan Yao d2263de137 KVM: x86/mmu: Set memory encryption "value", not "mask", in shadow PDPTRs 
Assign shadow_me_value, not shadow_me_mask, to PAE root entries,
a.k.a. shadow PDPTRs, when host memory encryption is supported.  The
"mask" is the set of all possible memory encryption bits, e.g. MKTME
KeyIDs, whereas "value" holds the actual value that needs to be
stuffed into host page tables.

Using shadow_me_mask results in a failed VM-Entry due to setting
reserved PA bits in the PDPTRs, and ultimately causes an OOPS due to
physical addresses with non-zero MKTME bits sending to_shadow_page()
into the weeds:

set kvm_intel.dump_invalid_vmcs=1 to dump internal KVM state.
BUG: unable to handle page fault for address: ffd43f00063049e8
PGD 86dfd8067 P4D 0
Oops: 0000 [#1] PREEMPT SMP
RIP: 0010:mmu_free_root_page+0x3c/0x90 [kvm]
 kvm_mmu_free_roots+0xd1/0x200 [kvm]
 __kvm_mmu_unload+0x29/0x70 [kvm]
 kvm_mmu_unload+0x13/0x20 [kvm]
 kvm_arch_destroy_vm+0x8a/0x190 [kvm]
 kvm_put_kvm+0x197/0x2d0 [kvm]
 kvm_vm_release+0x21/0x30 [kvm]
 __fput+0x8e/0x260
 ____fput+0xe/0x10
 task_work_run+0x6f/0xb0
 do_exit+0x327/0xa90
 do_group_exit+0x35/0xa0
 get_signal+0x911/0x930
 arch_do_signal_or_restart+0x37/0x720
 exit_to_user_mode_prepare+0xb2/0x140
 syscall_exit_to_user_mode+0x16/0x30
 do_syscall_64+0x4e/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: e54f1ff244 ("KVM: x86/mmu: Add shadow_me_value and repurpose shadow_me_mask")
Signed-off-by: Yuan Yao <yuan.yao@intel.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Message-Id: <20220608012015.19566-1-yuan.yao@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-06-09 10:52:16 -04:00
arch KVM: x86/mmu: Set memory encryption "value", not "mask", in shadow PDPTRs 2022-06-09 10:52:16 -04:00
block for-5.19/drivers-2022-06-02 2022-06-03 10:25:56 -07:00
certs Kbuild updates for v5.19 2022-05-26 12:09:50 -07:00
crypto This update includes the following changes: 2022-05-27 18:06:49 -07:00
Documentation KVM: arm64: Ignore 'kvm-arm.mode=protected' when using VHE 2022-06-09 13:24:02 +01:00
drivers fix for breakage in #work.fd this window 2022-06-05 17:14:03 -07:00
fs fix for breakage in #work.fd this window 2022-06-05 17:14:03 -07:00
include A single featurelet for delay accounting. Delayed a bit 2022-06-05 16:58:27 -07:00
init This set of changes updates init and user mode helper tasks to be 2022-06-03 16:03:05 -07:00
ipc These changes update the ipc sysctls so that they are fundamentally 2022-06-03 15:54:57 -07:00
kernel KVM/riscv fixes for 5.19, take #1 2022-06-09 09:45:00 -04:00
lib Bitmap patches for 5.19-rc1 2022-06-04 14:04:27 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm Hot fixes for 5.19-rc1. 2022-06-05 17:05:38 -07:00
net bluetooth: don't use bitmaps for random flag accesses 2022-06-05 16:28:41 -07:00
samples drm for 5.19-rc1 2022-05-25 16:18:27 -07:00
scripts A set of objtool fixes: 2022-06-05 09:45:27 -07:00
security Cleanups (and one fix) around struct mount handling. 2022-06-04 19:00:05 -07:00
sound USB / Thunderbolt changes for 5.19-rc1 2022-06-03 11:17:49 -07:00
tools KVM/riscv fixes for 5.19, take #1 2022-06-09 09:45:00 -04:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM/riscv fixes for 5.19, take #1 2022-06-09 09:45:00 -04:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap Hot fixes for 5.19-rc1. 2022-06-05 17:05:38 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: replace a Microchip AT91 maintainer 2022-02-09 11:30:01 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: Limit KVM RISC-V entry to existing selftests 2022-06-09 09:18:22 +05:30
Makefile Linux 5.19-rc1 2022-06-05 17:18:54 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.