ChangeLog:
* since v1:
- include "hw: add compat machines for 5.0" to provide
compat context for 4.2 machine types
- add comment that SMRAM at SMBASE is QEMU hack
and why it was used
- split command data 2 into a separate patch
"acpi: cpuhp: introduce 'Command data 2' field"
- rewrite enabling/detecting modern CPU hotplug interface
to use existing CPHP_GET_NEXT_CPU_WITH_EVENT_CMD and
squash it into "acpi: cpuhp: spec: add typical usecases" patch
- "acpi: cpuhp: add CPHP_GET_CPU_ID_CMD command"
modulo 'Command data 2' being moved out into separate patch,
rewrite commit message to explain better why new command is needed.
Series consists of 2 parts: 1st is lockable SMRAM at SMBASE
and the 2nd better documents interface and adds means to
enumerate APIC IDs for possible CPUs.
1st part [1-2/9]:
In order to support CPU hotplug in secure boot mode,
UEFI firmware needs to relocate SMI handler of hotplugged CPU,
in a way that won't allow ring 0 user to break in priveleged
SMM mode that firmware maintains during runtime.
Used approach allows to hide RAM at default SMBASE to make it
accessible only to SMM mode, which lets us to make sure that
SMI handler installed by firmware can not be hijacked by
unpriveleged user (similar to TSEG behavior).
2nd part:
mostly fixes and extra documentation on how to detect and use
modern CPU hotplug interface (MMIO block).
So firmware could reuse it for enumerating possible CPUs and
detecting hotplugged CPU(s). It also adds support for
CPHP_GET_CPU_ID_CMD command [7/8], which should allow firmware
to fetch APIC IDs for possible CPUs which is necessary for
initializing internal structures for possible CPUs on boot.
CC: m...@redhat.com
CC: pbonz...@redhat.com
CC: ler...@redhat.com
CC: phi...@redhat.com
Cornelia Huck (1):
hw: add compat machines for 5.0
Igor Mammedov (8):
q35: implement 128K SMRAM at default SMBASE address
tests: q35: MCH: add default SMBASE SMRAM lock test
acpi: cpuhp: spec: clarify 'CPU selector' register usage and
endianness
acpi: cpuhp: spec: fix 'Command data' description
acpi: cpuhp: spec: clarify store into 'Command data' when 'Command
field' == 0
acpi: cpuhp: introduce 'Command data 2' field
acpi: cpuhp: spec: add typical usecases
acpi: cpuhp: add CPHP_GET_CPU_ID_CMD command
include/hw/boards.h | 3 ++
include/hw/i386/pc.h | 3 ++
include/hw/pci-host/q35.h | 10 ++++
docs/specs/acpi_cpu_hotplug.txt | 89 +++++++++++++++++++++++++++-------
hw/acpi/cpu.c | 18 +++++++
hw/acpi/trace-events | 1 +
hw/arm/virt.c | 7 ++-
hw/core/machine.c | 3 ++
hw/i386/pc.c | 5 ++
hw/i386/pc_piix.c | 14 +++++-
hw/i386/pc_q35.c | 13 ++++-
hw/pci-host/q35.c | 84 +++++++++++++++++++++++++++++---
hw/ppc/spapr.c | 15 +++++-
hw/s390x/s390-virtio-ccw.c | 14 +++++-
tests/q35-test.c | 105 ++++++++++++++++++++++++++++++++++++++++
15 files changed, 354 insertions(+), 30 deletions(-)
--
2.7.4
