[v3,0/2] hw/arm/virt: Simulate NMI Injection

Message

Gavin Shan Feb. 14, 2020, 5:59 a.m. UTC

This series simulates the behavior of receiving NMI interrupt for "virt"
board. First of all, a new interrupt (SError) is supported for each CPU.
The backend is either sending error events through kvm module or emulating
the bahavior when TCG is enabled. The outcome is SError or data abort is
raised to crash guest.

For GICv2 or GICv3, a new IRQ line is added for each CPU and it's connected
to the (above) introduced SError interrupt. The IRQ line of CPU#0 is raised
when HMP/QMP "nmi" is issued, to crash the guest.

Testing
=======

After the HMP/QMP "nmi" is issued in the following 4 environment, the guest is
crashed as expected.

   Accel     Mode                  Crashed    Parameter
   ------------------------------------------------------------------------
   kvm       aarch64               yes        -machine virt -cpu host
   kvm       aarch32(cortex-a15)   yes        -machine virt -cpu host,aarch64=off
   tcg       aarch64               yes        -machine virt -cpu max
   tcg       aarch32(cortex-a15)   yes        -machine virt -cpu cortex-a15

Changelog
=========
v3:
   * Support SError injection for aarch32                 (Richard Henderson)
   * Export the SError injection through IRQ line         (Peter Maydell)
   * Removed RFC tag as it seems in correct track         (Gavin Shan)
v2: 
   * Redesigned to fully exploit SError interrupt

Gavin Shan (2):
  target/arm: Support SError injection
  hw/arm/virt: Simulate NMI injection

 hw/arm/virt.c                      | 34 ++++++++++++++-
 hw/intc/arm_gic_common.c           |  3 ++
 hw/intc/arm_gicv3_common.c         |  3 ++
 include/hw/intc/arm_gic_common.h   |  1 +
 include/hw/intc/arm_gicv3_common.h |  1 +
 target/arm/cpu.c                   | 69 ++++++++++++++++++++++++------
 target/arm/cpu.h                   | 17 +++++---
 target/arm/helper.c                |  6 +++
 target/arm/m_helper.c              |  8 ++++
 9 files changed, 122 insertions(+), 20 deletions(-)