[0/2] kvm: Improve register failure reports for migration

Message

Julia Suvorova Sept. 25, 2024, 3:36 p.m. UTC

There were a few bugs with silent cpu failures during migrations [1].
The failures are no longer silent thanks to [2], but still
indistinguishable, making diagnostics difficult.

This patchset reworks kvm_arch_get/put_registers to handle Error** and
return a correct message, with x86_64 as a start.

[1] https://issues.redhat.com/browse/RHEL-7558
[2] 7191f24c7fcf "accel/kvm/kvm-all: Handle register access errors"

Julia Suvorova (2):
  kvm: Allow kvm_arch_get/put_registers to accept Error**
  target/i386/kvm: Report which action failed in
    kvm_arch_put/get_registers

 accel/kvm/kvm-all.c        | 41 +++++++++++++++++++++++++++++---------
 include/sysemu/kvm.h       |  4 ++--
 target/arm/kvm.c           |  4 ++--
 target/i386/kvm/kvm.c      | 27 +++++++++++++++++++++++--
 target/loongarch/kvm/kvm.c |  4 ++--
 target/mips/kvm.c          |  4 ++--
 target/ppc/kvm.c           |  2 +-
 target/riscv/kvm/kvm-cpu.c |  4 ++--
 target/s390x/kvm/kvm.c     |  4 ++--
 9 files changed, 70 insertions(+), 24 deletions(-)