We cannot entirely eliminate the manual boot script building in this
driver, as it also programs lower-level chipset registers (SMI_EN,
GEN_PMCON_1) at S3 resume, not just registers exposed via fw_cfg.
We can nonetheless replace the manually built opcodes for the latter class
of registers with QemuFwCfgS3Lib function calls. We preserve the ordering
between the two sets of registers (low-level chipset first, fw_cfg
second).
This patch demonstrates that manual handling of S3SaveState protocol
installation can be combined with QemuFwCfgS3Lib, even without upsetting
the original order between boot script fragments. An S3SaveState notify
function running at TPL_CALLBACK can safely queue another S3SaveState
notify function at TPL_CALLBACK with QemuFwCfgS3CallWhenBootScriptReady().
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=394
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
At this point we're ready to retire QemuFwCfgS3Enabled() from the
QemuFwCfgLib class, together with its implementations in:
- ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
- OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
Extend all modules that call the function with a new QemuFwCfgS3Lib class
dependency. Thanks to the previously added library class, instances, and
class resolutions, we can do this switch now as tightly as possible.
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=394
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
When writing to IO port 0xB2 (ICH9_APM_CNT), QEMU by default injects an
SMI only on the VCPU that is writing the port. This has exposed corner
cases and strange behavior with edk2 code, which generally expects a
software SMI to affect all CPUs at once. We've experienced instability
despite the fact that OVMF sets PcdCpuSmmApSyncTimeout and
PcdCpuSmmSyncMode differently from the UefiCpuPkg defaults, such that they
match QEMU's unicast SMIs better. (Refer to edk2 commits 9b1e378811 and
bb0f18b0bce6.)
Using the new fw_cfg-based SMI feature negotiation in QEMU (see commits
50de920b372b "hw/isa/lpc_ich9: add SMI feature negotiation via fw_cfg" and
5ce45c7a2b15 "hw/isa/lpc_ich9: add broadcast SMI feature"), we can ask
QEMU to broadcast SMIs. Extensive testing from earlier proves that
broadcast SMIs are only reliable if we use the UefiCpuPkg defaults for the
above PCDs. With those settings however, the broadcast is very reliable --
the most reliable configuration encountered thus far.
Therefore negotiate broadcast SMIs with QEMU, and if the negotiation is
successful, dynamically revert the PCDs to the UefiCpuPkg defaults.
Setting the PCDs in this module is safe:
- only PiSmmCpuDxeSmm consumes them,
- PiSmmCpuDxeSmm is a DXE_SMM_DRIVER, launched by the SMM_CORE
(MdeModulePkg/Core/PiSmmCore/PiSmmCore.inf),
- the SMM_CORE is launched by the SMM IPL runtime DXE driver
(MdeModulePkg/Core/PiSmmCore/PiSmmIpl.inf),
- the SMM IPL has a DEPEX on EFI_SMM_CONTROL2_PROTOCOL,
- OvmfPkg/SmmControl2Dxe produces that protocol.
The end result is that PiSmmCpuDxeSmm cannot be dispatched before
SmmControl2Dxe installs EFI_SMM_CONTROL2_PROTOCOL and returns from its
entry point. Hence we can set the PCD's consumed by PiSmmCpuDxeSmm in
SmmControl2Dxe.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=230
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
EFI_BOOT_SCRIPT_PCI_CONFIG_READ_WRITE_OPCODE expects the PCI address to
access in UEFI encoding, not in edk2/PciLib encoding.
Introduce the POWER_MGMT_REGISTER_Q35_EFI_PCI_ADDRESS() macro, and with
it, store the ICH9_GEN_PMCON_1 register's address to the boot script in
UEFI representation.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
The EFI_SMM_COMMUNICATION_PROTOCOL implementation that is provided by the
SMM core depends on EFI_SMM_CONTROL2_PROTOCOL; see the
mSmmControl2->Trigger() call in the SmmCommunicationCommunicate() function
[MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c].
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19042 6f19259b-4bc3-4df7-8a09-765794883524
Rebecca Cran
Michael D Kinney
Laszlo Ersek