[PATCH v4 0/2] Add support for LAM in QEMU

[Binbin Wu <binbin.wu@linux.intel.com>]

Linear-address masking (LAM) [1], modifies the checking that is applied to
*64-bit* linear addresses, allowing software to use of the untranslated
address bits for metadata and masks the metadata bits before using them as
linear addresses to access memory.

When the feature is virtualized and exposed to guest, it can be used for 
efficient
address sanitizers (ASAN) implementation and for optimizations in JITs and 
virtual machines.

The KVM patch series can be found in [2].

[1] Intel ISE https://cdrdv2.intel.com/v1/dl/getContent/671368
    Chapter Linear Address Masking (LAM)
[2] https://lore.kernel.org/kvm/20230913124227.12574-1-binbin.wu@linux.intel.com

---
Changelog
v4:
- Add a reviewed-by from Xiaoyao for patch 1.
- Mask out LAM bit on CR4 if vcpu doesn't support LAM in cpu_x86_update_cr4() (Xiaoyao)

v3:
- https://lists.gnu.org/archive/html/qemu-devel/2023-07/msg04160.html

Binbin Wu (1):
  target/i386: add control bits support for LAM

Robert Hoo (1):
  target/i386: add support for LAM in CPUID enumeration

 target/i386/cpu.c    | 2 +-
 target/i386/cpu.h    | 9 ++++++++-
 target/i386/helper.c | 4 ++++
 3 files changed, 13 insertions(+), 2 deletions(-)


base-commit: f614acb7450282a119d85d759f27eae190476058
-- 
2.25.1