[Qemu-devel] [PATCH 0/5] Use non-blacklisted family/model/stepping for Haswell CPU model

[Eduardo Habkost]

A recent glibc commit[1] added a blacklist to ensure it won't use
TSX on hosts that are known to have a broken TSX implementation.

Our existing Haswell CPU model has a blacklisted
family/model/stepping combination, so it has to be updated to
make sure guests will really use TSX. This is done by patch 5/5.

However, to do this safely we need to ensure the host CPU is not
a blacklisted one, so we won't mislead guests by exposing
known-to-be-good FMS values on a known-to-be-broken host. This is
done by patch 3/5.

[1] 
https://sourceware.org/git/?p=glibc.git;a=commit;h=2702856bf45c82cf8e69f2064f5aa15c0ceb6359

---
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden
Cc: address@hidden

Eduardo Habkost (5):
  i386: Add explicit array size to x86_cpu_vendor_words2str()
  i386: host_vendor_fms() helper function
  i386/kvm: Blacklist TSX on known broken hosts
  pc: Add 2.9 machine-types
  i386: Change stepping of Haswell to non-blacklisted value

 include/hw/i386/pc.h |  6 ++++++
 target/i386/cpu.h    |  1 +
 hw/i386/pc_piix.c    | 15 ++++++++++++---
 hw/i386/pc_q35.c     | 13 +++++++++++--
 target/i386/cpu.c    | 32 ++++++++++++++++++++++----------
 target/i386/kvm.c    | 17 +++++++++++++++++
 6 files changed, 69 insertions(+), 15 deletions(-)

-- 
2.11.0.259.g40922b1