On 31/12/20 01:26, Sean Christopherson wrote:
This series is a conglomeration of three previous series/patches and a bit of new code. None of the previous series are directly related, but they are all needed to achieve the overarching goal of nuking __kvm_handle_fault_on_reboot(), which is a rather ugly inline asm macro that has the unfortunate side effect of inserting in-line JMP+CALL sequences. Patches 1-3 are resurrected from a series by David Reed[1] to fix VMXOFF bugs in the reboot flows. Patch 4 is a patch from Uros Bizjak to get rid of custom inline asm in nested VMX. This already received Paolo's "Queued, thanks." blessing, but has not been pushed to kvm.git. It's included here as there is an indirect dependency in patch 8. Patches 5-6 are minor tweaks to KVM's VMX{ON/OFF} paths to use the kernel's now-fault-tolerant VMXOFF instead of KVM's custom asm. Patch 7 replaces SVM's __ex()/__kvm_handle_fault_on_reboot() with more tailored asm goto macros, similar to the existing VMX asm_vmx*() macros. This is largely an excuse to get rid of __kvm_handle_fault_on_reboot(); the actual benefits of removing JMP+CALL are likely negligible as SVM only has a few uses of the macro (versus VMX's bajillion VMREADs/VMWRITEs). Patch 8 removes __ex()/__kvm_handle_fault_on_reboot(). Patch 9 is a very trimmed down version of a different patch from Uros[3], which cleaned up the __ex()/__kvm_handle_fault_on_reboot() code, as opposed to zapping them entirely. [1] https://lkml.kernel.org/r/20200704203809.76391-1-dpreed@xxxxxxxxxxxx [2] https://lkml.kernel.org/r/20201029134145.107560-1-ubizjak@xxxxxxxxx [3] https://lkml.kernel.org/r/20201221194800.46962-1-ubizjak@xxxxxxxxx David P. Reed (1): x86/virt: Mark flags and memory as clobbered by VMXOFF Sean Christopherson (6): x86/virt: Eat faults on VMXOFF in reboot flows x86/reboot: Force all cpus to exit VMX root if VMX is supported KVM: VMX: Move Intel PT shenanigans out of VMXON/VMXOFF flows KVM: VMX: Use the kernel's version of VMXOFF KVM: SVM: Use asm goto to handle unexpected #UD on SVM instructions KVM: x86: Kill off __ex() and __kvm_handle_fault_on_reboot() Uros Bizjak (2): KVM/nVMX: Use __vmx_vcpu_run in nested_vmx_check_vmentry_hw KVM: x86: Move declaration of kvm_spurious_fault() to x86.h arch/x86/include/asm/kvm_host.h | 25 -------------- arch/x86/include/asm/virtext.h | 25 ++++++++++---- arch/x86/kernel/reboot.c | 30 ++++++----------- arch/x86/kvm/svm/sev.c | 5 ++- arch/x86/kvm/svm/svm.c | 18 +--------- arch/x86/kvm/svm/svm_ops.h | 59 +++++++++++++++++++++++++++++++++ arch/x86/kvm/vmx/nested.c | 32 ++---------------- arch/x86/kvm/vmx/vmenter.S | 2 +- arch/x86/kvm/vmx/vmx.c | 28 ++++++---------- arch/x86/kvm/vmx/vmx.h | 1 + arch/x86/kvm/vmx/vmx_ops.h | 4 +-- arch/x86/kvm/x86.c | 9 ++++- arch/x86/kvm/x86.h | 2 ++ 13 files changed, 117 insertions(+), 123 deletions(-) create mode 100644 arch/x86/kvm/svm/svm_ops.h
Queued, thanks. Paolo