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Date: Tue, 6 Feb 2018 21:05:46 +0000
From: "Woodhouse, David" <dwmw@...zon.co.uk>
To: Paolo Bonzini <pbonzini@...hat.com>,
Jim Mattson <jmattson@...gle.com>,
Radim Krčmář <rkrcmar@...hat.com>,
<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
KarimAllah Ahmed <karahmed@...zon.de>,
<gregkh@...uxfoundation.org>, <stable@...r.kernel.org>
Subject: Re: [STABLE 4.9.y PATCH 0/9] Backport of KVM Speculation Control
support
On Tue, 2018-02-06 at 19:01 +0100, Paolo Bonzini wrote:
> On 06/02/2018 18:29, David Woodhouse wrote:
> > I've put together a linux-4.9.y branch at
> > http://git.infradead.org/retpoline-stable.git/shortlog/refs/heads/linux-4.9.y
> >
> > Most of it is fairly straightforward, apart from the IBPB on context
> > switch for which Tim has already posted a candidate. I wanted some more
> > review on my backports of the KVM bits though, including some extra
> > historical patches I pulled in.
>
> Looks good! Thanks for the work,
>
> Paolo
Thanks. In that case, Greg, the full set is lined up in
http://git.infradead.org/retpoline-stable.git/shortlog/refs/heads/linux-4.9.y
or git://git.infradead.org/retpoline-stable linux-4.9.y
This matches what Linus just pulled in from tip/x86-pti-for-linus,
except that it's missing the IBPB on context switch (qv).
----------------------------------------------------------------
Andi Kleen (1):
module/retpoline: Warn about missing retpoline in module
Andy Lutomirski (3):
x86/entry/64: Remove the SYSCALL64 fast path
x86/entry/64: Push extra regs right away
x86/asm: Move 'status' from thread_struct to thread_info
Arnd Bergmann (1):
x86/pti: Mark constant arrays as __initconst
Ashok Raj (1):
KVM/x86: Add IBPB support
Borislav Petkov (4):
x86/alternative: Print unadorned pointers
x86/nospec: Fix header guards names
x86/bugs: Drop one "mitigation" from dmesg
x86/retpoline: Simplify vmexit_fill_RSB()
Colin Ian King (1):
x86/spectre: Fix spelling mistake: "vunerable"-> "vulnerable"
Dan Williams (12):
array_index_nospec: Sanitize speculative array de-references
x86: Implement array_index_mask_nospec
x86: Introduce barrier_nospec
x86: Introduce __uaccess_begin_nospec() and uaccess_try_nospec
x86/usercopy: Replace open coded stac/clac with __uaccess_{begin, end}
x86/uaccess: Use __uaccess_begin_nospec() and uaccess_try_nospec
x86/get_user: Use pointer masking to limit speculation
x86/syscall: Sanitize syscall table de-references under speculation
vfs, fdtable: Prevent bounds-check bypass via speculative execution
nl80211: Sanitize array index in parse_txq_params
x86/spectre: Report get_user mitigation for spectre_v1
x86/kvm: Update spectre-v1 mitigation
Darren Kenny (1):
x86/speculation: Fix typo IBRS_ATT, which should be IBRS_ALL
David Hildenbrand (1):
KVM: nVMX: vmx_complete_nested_posted_interrupt() can't fail
David Matlack (1):
KVM: nVMX: mark vmcs12 pages dirty on L2 exit
David Woodhouse (10):
x86/cpufeatures: Add CPUID_7_EDX CPUID leaf
x86/cpufeatures: Add Intel feature bits for Speculation Control
x86/cpufeatures: Add AMD feature bits for Speculation Control
x86/msr: Add definitions for new speculation control MSRs
x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
x86/cpufeature: Blacklist SPEC_CTRL/PRED_CMD on early Spectre v2 microcodes
x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support
x86/cpufeatures: Clean up Spectre v2 related CPUID flags
x86/cpuid: Fix up "virtual" IBRS/IBPB/STIBP feature bits on Intel
x86/retpoline: Avoid retpolines for built-in __init functions
Dou Liyang (1):
x86/spectre: Check CONFIG_RETPOLINE in command line parser
Jim Mattson (1):
KVM: nVMX: Eliminate vmcs02 pool
Josh Poimboeuf (1):
x86/paravirt: Remove 'noreplace-paravirt' cmdline option
KarimAllah Ahmed (4):
x86/spectre: Simplify spectre_v2 command line parsing
KVM/VMX: Emulate MSR_IA32_ARCH_CAPABILITIES
KVM/VMX: Allow direct access to MSR_IA32_SPEC_CTRL
KVM/SVM: Allow direct access to MSR_IA32_SPEC_CTRL
Mark Rutland (1):
Documentation: Document array_index_nospec
Paolo Bonzini (2):
KVM: VMX: introduce alloc_loaded_vmcs
KVM: VMX: make MSR bitmaps per-VCPU
Peter Zijlstra (2):
KVM: x86: Make indirect calls in emulator speculation safe
KVM: VMX: Make indirect call speculation safe
Thomas Gleixner (1):
x86/cpu/bugs: Make retpoline module warning conditional
Waiman Long (1):
x86/retpoline: Remove the esp/rsp thunk
Documentation/kernel-parameters.txt | 2 -
Documentation/speculation.txt | 90 +++++++++++++
arch/x86/entry/common.c | 9 +-
arch/x86/entry/entry_32.S | 3 +-
arch/x86/entry/entry_64.S | 134 ++----------------
arch/x86/entry/syscall_64.c | 7 +-
arch/x86/include/asm/asm-prototypes.h | 4 +-
arch/x86/include/asm/barrier.h | 28 ++++
arch/x86/include/asm/cpufeature.h | 7 +-
arch/x86/include/asm/cpufeatures.h | 22 ++-
arch/x86/include/asm/disabled-features.h | 3 +-
arch/x86/include/asm/intel-family.h | 7 +-
arch/x86/include/asm/msr-index.h | 12 ++
arch/x86/include/asm/msr.h | 3 +-
arch/x86/include/asm/nospec-branch.h | 91 ++++---------
arch/x86/include/asm/processor.h | 2 -
arch/x86/include/asm/required-features.h | 3 +-
arch/x86/include/asm/syscall.h | 6 +-
arch/x86/include/asm/thread_info.h | 3 +-
arch/x86/include/asm/uaccess.h | 15 ++-
arch/x86/include/asm/uaccess_32.h | 12 +-
arch/x86/include/asm/uaccess_64.h | 12 +-
arch/x86/kernel/alternative.c | 28 +---
arch/x86/kernel/cpu/bugs.c | 128 +++++++++++++-----
arch/x86/kernel/cpu/common.c | 70 +++++++++-
arch/x86/kernel/cpu/intel.c | 66 +++++++++
arch/x86/kernel/cpu/scattered.c | 2 -
arch/x86/kernel/process_64.c | 4 +-
arch/x86/kernel/ptrace.c | 2 +-
arch/x86/kernel/signal.c | 2 +-
arch/x86/kvm/cpuid.c | 21 ++-
arch/x86/kvm/cpuid.h | 31 +++++
arch/x86/kvm/emulate.c | 10 +-
arch/x86/kvm/svm.c | 116 ++++++++++++++++
arch/x86/kvm/vmx.c | 754 ++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------------------
arch/x86/kvm/x86.c | 1 +
arch/x86/lib/Makefile | 1 +
arch/x86/lib/getuser.S | 10 ++
arch/x86/lib/retpoline.S | 57 +++++++-
arch/x86/lib/usercopy_32.c | 8 +-
include/linux/fdtable.h | 5 +-
include/linux/init.h | 9 +-
include/linux/module.h | 9 ++
include/linux/nospec.h | 72 ++++++++++
kernel/module.c | 11 ++
net/wireless/nl80211.c | 9 +-
scripts/mod/modpost.c | 9 ++
47 files changed, 1230 insertions(+), 680 deletions(-)
create mode 100644 Documentation/speculation.txt
create mode 100644 include/linux/nospec.h
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