These patches enable launching a confidential guest with QEMU KVM on
Arm. The KVM changes for CCA have now been posted as v2 [1]. Launching a
confidential VM requires two additional command-line parameters:

        -M confidential-guest-support=rme0
        -object rme-guest,id=rme0

Since the RFC [2] I tried to address all review comments, and added a
few features:

* Enabled support for guest memfd by Xiaoyao Li and Chao Peng [3].
  Guest memfd is mandatory for CCA.

* Support firmware boot (edk2).

* Use CPU command-line arguments for Realm parameters. SVE vector length
  uses the existing sve<N> -cpu parameters, while breakpoints, watchpoints
  and PMU counters use new CPU parameters.

The full series based on the memfd patches is at:
https://git.codelinaro.org/linaro/dcap/qemu.git branch cca/v2

Please find instructions for building and running the whole CCA stack at:
https://linaro.atlassian.net/wiki/spaces/QEMU/pages/29051027459/Building+an+RME+stack+for+QEMU

[1] https://lore.kernel.org/kvm/20240412084056.1733704-1-steven.price@arm.com/
[2] https://lore.kernel.org/all/20230127150727.612594-1-jean-philippe@linaro.org/
[3] https://lore.kernel.org/qemu-devel/20240322181116.1228416-1-pbonzini@redhat.com/

Jean-Philippe Brucker (22):
  kvm: Merge kvm_check_extension() and kvm_vm_check_extension()
  target/arm: Add confidential guest support
  target/arm/kvm: Return immediately on error in kvm_arch_init()
  target/arm/kvm-rme: Initialize realm
  hw/arm/virt: Add support for Arm RME
  hw/arm/virt: Disable DTB randomness for confidential VMs
  hw/arm/virt: Reserve one bit of guest-physical address for RME
  target/arm/kvm: Split kvm_arch_get/put_registers
  target/arm/kvm-rme: Initialize vCPU
  target/arm/kvm: Create scratch VM as Realm if necessary
  hw/core/loader: Add ROM loader notifier
  target/arm/kvm-rme: Populate Realm memory
  hw/arm/boot: Register Linux BSS section for confidential guests
  target/arm/kvm-rme: Add Realm Personalization Value parameter
  target/arm/kvm-rme: Add measurement algorithm property
  target/arm/cpu: Set number of breakpoints and watchpoints in KVM
  target/arm/cpu: Set number of PMU counters in KVM
  target/arm/kvm: Disable Realm reboot
  target/arm/cpu: Inform about reading confidential CPU registers
  target/arm/kvm-rme: Enable guest memfd
  hw/arm/virt: Move virt_flash_create() to machvirt_init()
  hw/arm/virt: Use RAM instead of flash for confidential guest firmware

 docs/system/arm/virt.rst                   |   9 +-
 docs/system/confidential-guest-support.rst |   1 +
 qapi/qom.json                              |  34 +-
 include/hw/arm/boot.h                      |   9 +
 include/hw/arm/virt.h                      |   2 +-
 include/hw/loader.h                        |  15 +
 include/sysemu/kvm.h                       |   2 -
 include/sysemu/kvm_int.h                   |   1 +
 target/arm/cpu.h                           |  10 +
 target/arm/kvm_arm.h                       |  25 ++
 accel/kvm/kvm-all.c                        |  34 +-
 hw/arm/boot.c                              |  45 ++-
 hw/arm/virt.c                              | 118 ++++--
 hw/core/loader.c                           |  15 +
 target/arm/arm-qmp-cmds.c                  |   1 +
 target/arm/cpu.c                           |   5 +
 target/arm/cpu64.c                         | 118 ++++++
 target/arm/kvm-rme.c                       | 413 +++++++++++++++++++++
 target/arm/kvm.c                           | 200 +++++++++-
 target/i386/kvm/kvm.c                      |   6 +-
 target/ppc/kvm.c                           |  36 +-
 target/arm/meson.build                     |   7 +-
 22 files changed, 1023 insertions(+), 83 deletions(-)
 create mode 100644 target/arm/kvm-rme.c

-- 
2.44.0