linux-xiaomi-chiron

Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices: OnePlus 5/5T, Xiaomi Mi 6, F(x)tec Pro¹ (2019 QX1000 model) & Sony Xperia XZ Premium (UNTESTED!)

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Wanpeng Li d4912215d1 KVM: nVMX: Fix exception injection WARNING: CPU: 3 PID: 2840 at arch/x86/kvm/vmx.c:10966 nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] CPU: 3 PID: 2840 Comm: qemu-system-x86 Tainted: G OE 4.12.0-rc3+ #23 RIP: 0010:nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] Call Trace: ? kvm_check_async_pf_completion+0xef/0x120 [kvm] ? rcu_read_lock_sched_held+0x79/0x80 vmx_queue_exception+0x104/0x160 [kvm_intel] ? vmx_queue_exception+0x104/0x160 [kvm_intel] kvm_arch_vcpu_ioctl_run+0x1171/0x1ce0 [kvm] ? kvm_arch_vcpu_load+0x47/0x240 [kvm] ? kvm_arch_vcpu_load+0x62/0x240 [kvm] kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? __fget+0xf3/0x210 do_vfs_ioctl+0xa4/0x700 ? __fget+0x114/0x210 SyS_ioctl+0x79/0x90 do_syscall_64+0x81/0x220 entry_SYSCALL64_slow_path+0x25/0x25 This is triggered occasionally by running both win7 and win2016 in L2, in addition, EPT is disabled on both L1 and L2. It can't be reproduced easily. Commit `0b6ac343fc` (KVM: nVMX: Correct handling of exception injection) mentioned that "KVM wants to inject page-faults which it got to the guest. This function assumes it is called with the exit reason in vmcs02 being a #PF exception". Commit `e011c663` (KVM: nVMX: Check all exceptions for intercept during delivery to L2) allows to check all exceptions for intercept during delivery to L2. However, there is no guarantee the exit reason is exception currently, when there is an external interrupt occurred on host, maybe a time interrupt for host which should not be injected to guest, and somewhere queues an exception, then the function nested_vmx_check_exception() will be called and the vmexit emulation codes will try to emulate the "Acknowledge interrupt on exit" behavior, the warning is triggered. Reusing the exit reason from the L2->L0 vmexit is wrong in this case, the reason must always be EXCEPTION_NMI when injecting an exception into L1 as a nested vmexit. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Fixes: `e011c663b9` ("KVM: nVMX: Check all exceptions for intercept during delivery to L2") Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>		2017-06-06 15:21:50 +02:00
arch	KVM: nVMX: Fix exception injection	2017-06-06 15:21:50 +02:00
block	block: Avoid that blk_exit_rl() triggers a use-after-free	2017-06-01 13:07:55 -06:00
certs	scripts/spelling.txt: add "intialise(d)" pattern and fix typo instances	2017-05-08 17:15:13 -07:00
crypto	crypto: skcipher - Add missing API setkey checks	2017-05-18 13:04:05 +08:00
Documentation	Pin control fixes for v4.12:	2017-05-29 10:05:19 -07:00
drivers	TTY fix for 4.12-rc4	2017-06-04 11:41:41 -07:00
firmware	firmware/Makefile: force recompilation if makefile changes	2017-05-08 17:15:10 -07:00
fs	fs/ufs: Set UFS default maximum bytes per file	2017-06-04 16:33:54 -07:00
include	Fixes for 4.12-rc	2017-06-04 10:41:32 -07:00
init	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-10 10:30:46 -07:00
ipc	mm: introduce kv[mz]alloc helpers	2017-05-08 17:15:12 -07:00
kernel	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2017-06-02 08:59:17 -07:00
lib	test_bpf: Add a couple of tests for BPF_JSGE.	2017-05-25 14:37:56 -04:00
mm	mm: consider memblock reservations for deferred memory initialization sizing	2017-06-02 15:07:38 -07:00
net	NFS client bugfixes for Linux 4.12	2017-06-04 11:56:53 -07:00
samples	samples/bpf: run cleanup routines when receiving SIGTERM	2017-05-11 21:43:30 -04:00
scripts	scripts/gdb: make lx-dmesg command work (reliably)	2017-06-02 15:07:38 -07:00
security	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-05-09 09:12:53 -07:00
sound	sound fixes for 4.12-rc4	2017-06-02 09:40:47 -07:00
tools	powerpc fixes for 4.12 #4	2017-05-27 09:28:34 -07:00
usr	initramfs: fix disabling of initramfs (and its compression)	2017-06-02 15:07:37 -07:00
virt	KVM: arm/arm64: Hold slots_lock when unregistering kvm io bus devices	2017-05-18 11:18:16 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Add hch to .get_maintainer.ignore	2015-08-21 14:30:10 -07:00
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	kbuild: Add support to generate LLVM assembly files	2017-04-25 08:13:52 +09:00
.mailmap	power supply and reset changes for the v4.12 series (part 2)	2017-05-12 12:02:21 -07:00
COPYING	[PATCH] update FSF address in COPYING	2005-09-10 10:06:29 -07:00
CREDITS	avr32: remove support for AVR32 architecture	2017-05-01 09:27:15 +02:00
Kbuild	kbuild: Consolidate header generation from ASM offset information	2017-04-13 05:43:37 +09:00
Kconfig	kbuild: migrate all arch to the kconfig mainmenu upgrade	2010-09-19 22:54:11 -04:00
MAINTAINERS	RTC for 4.12 #2	2017-06-04 11:29:32 -07:00
Makefile	Linux 4.12-rc4	2017-06-04 16:47:43 -07:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

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

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.