[PATCH v2 0/8] x86/sev-es: Fixes for SEV-ES Guest Support

Joerg Roedel
Wed, 19 May 2021 13:52:43 -0000

Hi,

here is the second version of my pending SEV-ES fixes. The most
important patches are patch 1 to 5, as they fix warnings and splats
that trigger with various debugging options are enabled.

Patches 6 to 8 fix a correctness issue in the instruction emulation
part of the #VC exception handler.

Please review.

Thanks,

	Joerg

Link to v1: https://lore.kernel.org/lkml/20210512075445.18935-1-joro at
8bytes.org/

Changes since v1:

	- Documented why __get_user()/__put_user() are safe to use in
	  the #VC handlers memory access path.

	- Merged the revert into patch 3

	- Refactored code in the instruction decoder and added #GP
	  reporting when getting the instructions linear address fails.

Joerg Roedel (8):
  x86/sev-es: Don't return NULL from sev_es_get_ghcb()
  x86/sev-es: Forward page-faults which happen during emulation
  x86/sev-es: Use __put_user()/__get_user() for data accesses
  x86/sev-es: Fix error message in runtime #VC handler
  x86/sev-es: Leave NMI-mode before sending signals
  x86/insn-eval: Make 0 a valid RIP for insn_get_effective_ip()
  x86/insn: Extend error reporting from
    insn_fetch_from_user[_inatomic]()
  x86/sev-es: Propagate #GP if getting linear instruction address failed

 arch/x86/include/asm/insn-eval.h |   6 +-
 arch/x86/kernel/sev.c            | 127 +++++++++++++++++++++----------
 arch/x86/kernel/umip.c           |  10 +--
 arch/x86/lib/insn-eval.c         |  52 ++++++++-----
 4 files changed, 129 insertions(+), 66 deletions(-)


base-commit: a50c5bebc99c525e7fbc059988c6a5ab8680cb76
--
2.31.1