W dniu 20.09.2023 o 12:04, Leif Lindholm pisze:
On Wed, Sep 20, 2023 at 10:25:09 +0200, Marcin Juszkiewicz wrote:
Armv8.1+ cpus have Virtual Host Extension (VHE) which added non-secure
EL2 virtual timer.
It's still valid to use other CPUs than "max" with this platform.
Don't we need to conditionalise this based on the contents of the VH
bits in ID_AA64MFR1_EL1?
Most of cpu cores available for SBSA Reference Platform are v8.2+ ones.
And default is Neoverse-N1.
Ideally, we'd add a helper function in edk2
ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c, like ArmHasCcidx(), and
conditionalise on that.
Hmm, but we'd probably also need to move from .aslc to manually
construction GTDT in SbsaQemuAcpiDxe...
If you're up for doing the GTDT rework, I could create the ArmLib
helper function.
Sooner or later it needs to be done anyway as we need to add system
timers there (which iirc only Ampere does in EDK2).
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