Merge branch kvm-arm64/mpam-ni into kvmarm/next

* kvm-arm64/mpam-ni:
  : Hiding FEAT_MPAM from KVM guests, courtesy of James Morse + Joey Gouly
  :
  : Fix a longstanding bug where FEAT_MPAM was accidentally exposed to KVM
  : guests + the EL2 trap configuration was not explicitly configured. As
  : part of this, bring in skeletal support for initialising the MPAM CPU
  : context so KVM can actually set traps for its guests.
  :
  : Be warned -- if this series leads to boot failures on your system,
  : you're running on turd firmware.
  :
  : As an added bonus (that builds upon the infrastructure added by the MPAM
  : series), allow userspace to configure CTR_EL0.L1Ip, courtesy of Shameer
  : Kolothum.
  KVM: arm64: Make L1Ip feature in CTR_EL0 writable from userspace
  KVM: arm64: selftests: Test ID_AA64PFR0.MPAM isn't completely ignored
  KVM: arm64: Disable MPAM visibility by default and ignore VMM writes
  KVM: arm64: Add a macro for creating filtered sys_reg_descs entries
  KVM: arm64: Fix missing traps of guest accesses to the MPAM registers
  arm64: cpufeature: discover CPU support for MPAM
  arm64: head.S: Initialise MPAM EL2 registers and disable traps
  arm64/sysreg: Convert existing MPAM sysregs and add the remaining entries

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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