[MODERATED] Re: [PATCH v7 0/5] NX 0

[Paolo Bonzini <pbonzini@redhat.com>]

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On 24/10/19 20:27, speck for Ben Hutchings wrote:
> On Thu, 2019-10-24 at 18:34 +0200, speck for Paolo Bonzini wrote:
>> From: Paolo Bonzini <pbonzini@redhat.com>
>> Subject: [PATCH v7 0/5] NX 0
>>
>>
>> v6->v7: tell nested hypervisors to disable the mitigation
> 
> Does that eliminate the need to patch qemu?

No, it *introduces* the need to patch QEMU (because QEMU now can choose
to enable that bit in MSR_IA32_ARCH_CAPABILITIES; before, it need not
know about the bit).

Paolo

> Ben.
> 
>> Junaid Shahid (2):
>>   kvm: Add helper function for creating VM worker threads
>>   kvm: x86: mmu: Recovery of shattered NX large pages
>>
>> Paolo Bonzini (1):
>>   kvm: mmu: ITLB_MULTIHIT mitigation
>>
>> Pawan Gupta (2):
>>   x86: Add ITLB_MULTIHIT bug infrastructure
>>   x86/cpu: Add Tremont to the cpu vulnerability whitelist
>>
>>  Documentation/ABI/testing/sysfs-devices-system-cpu |   1 +
>>  Documentation/admin-guide/kernel-parameters.txt    |  17 ++
>>  arch/x86/include/asm/cpufeatures.h                 |   1 +
>>  arch/x86/include/asm/kvm_host.h                    |   6 +
>>  arch/x86/include/asm/msr-index.h                   |   7 +
>>  arch/x86/kernel/cpu/bugs.c                         |  24 ++
>>  arch/x86/kernel/cpu/common.c                       |  73 +++---
>>  arch/x86/kvm/mmu.c                                 | 264 ++++++++++++++++++++-
>>  arch/x86/kvm/mmu.h                                 |   4 +
>>  arch/x86/kvm/paging_tmpl.h                         |  29 ++-
>>  arch/x86/kvm/x86.c                                 |  20 ++
>>  drivers/base/cpu.c                                 |   8 +
>>  include/linux/cpu.h                                |   2 +
>>  include/linux/kvm_host.h                           |   6 +
>>  virt/kvm/kvm_main.c                                | 114 ++++++++-
>>  15 files changed, 530 insertions(+), 46 deletions(-)
>>