[Qemu-devel] [PATCH 0/3] qemu, pkeys: add memory protection-key support

[Huaitong Han]

The protection-key feature provides an additional mechanism by which IA-32e
paging controls access to usermode addresses.

Hardware support for protection keys for user pages is enumerated with CPUID
feature flag CPUID.7.0.ECX[3]:PKU. Software support is CPUID.7.0.ECX[4]:OSPKE
with the setting of CR4.PKE(bit 22).

The PKRU register is XSAVE-managed state CPUID.D.0.EAX[9], the size of XSAVE
state component for PKRU is 8 bytes, the offset is 0xa80.

The specification of Protection Keys can be found at SDM (4.6.2, volume 3)
http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-manual-325462.pdf.

Huaitong Han (3):
  qemu, pkeys: add pkeys support for qemu cpuid handling
  qemu, pkeys: add pkeys support for qemu xsave state handling
  qemu, pkeys: add pkeys support for qemu migration

 target-i386/cpu.c     | 23 ++++++++++++++++++++++-
 target-i386/cpu.h     |  7 +++++++
 target-i386/kvm.c     |  3 +++
 target-i386/machine.c | 23 +++++++++++++++++++++++
 4 files changed, 55 insertions(+), 1 deletion(-)

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2.4.3