[v4] Extend KVM_HC_MAP_GPA_RANGE api to allow retry

[PATCH v4 0/2] Extend KVM_HC_MAP_GPA_RANGE api to allow retry

Sagi Shahar posted 2 patches 3 weeks, 6 days ago

Diff against v3
Download series mbox

Documentation/virt/kvm/api.rst |  3 +++
arch/x86/kvm/svm/sev.c         | 12 ++++++++++--
arch/x86/kvm/vmx/tdx.c         | 28 +++++++++++++++++++++-------
arch/x86/kvm/x86.h             |  6 ++++++
4 files changed, 40 insertions(+), 9 deletions(-)

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[PATCH v4 0/2] Extend KVM_HC_MAP_GPA_RANGE api to allow retry

Posted by Sagi Shahar 3 weeks, 6 days ago

In some cases, userspace might decide to split MAP_GPA requests and
retry them the next time the guest runs. One common case is MAP_GPA
requests received right before intrahost migration when userspace
might decide to complete the request after the migration is complete
to reduce blackout time.

This is v4 of the series.

Changes from v3[1]:
 * Rebased on top of v7.0-rc2.
 * Switch "if" statement to switch-case in tdx_complete_vmcall_map_gpa()
   as suggested by Michael Roth.

[1] https://lore.kernel.org/lkml/20260206222829.3758171-1-sagis@google.com/

Sagi Shahar (1):
  KVM: SEV: Restrict userspace return codes for KVM_HC_MAP_GPA_RANGE

Vishal Annapurve (1):
  KVM: TDX: Allow userspace to return errors to guest for MAPGPA

 Documentation/virt/kvm/api.rst |  3 +++
 arch/x86/kvm/svm/sev.c         | 12 ++++++++++--
 arch/x86/kvm/vmx/tdx.c         | 28 +++++++++++++++++++++-------
 arch/x86/kvm/x86.h             |  6 ++++++
 4 files changed, 40 insertions(+), 9 deletions(-)

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2.53.0.473.g4a7958ca14-goog