[PATCH v4 0/9] KVM: arm64: Add support for FEAT_IDST

[Marc Zyngier]

On Thu, 08 Jan 2026 17:32:24 +0000, Marc Zyngier wrote:
> FEAT_IDST appeared in ARMv8.4, and allows ID registers to be trapped
> if they are not implemented. This only concerns 3 registers (GMID_EL1,
> CCSIDR2_EL1 and SMIDR_EL1), which are part of features that may not be
> exposed to the guest even if present on the host.
> 
> For these registers, the HW should report them with EC=0x18, even if
> the feature isn't implemented.
> 
> [...]

Applied to next, thanks!

[1/9] arm64: Repaint ID_AA64MMFR2_EL1.IDS description
      commit: 4a7fe842b8a3f3c173c3075f03c60c3f9f62e299
[2/9] KVM: arm64: Add trap routing for GMID_EL1
      commit: 1ad9767accfcb81f404aa3d37d46b3eb494dce2f
[3/9] KVM: arm64: Add a generic synchronous exception injection primitive
      commit: 19f75678238734ef383f9e10d8e1020873e97170
[4/9] KVM: arm64: Handle FEAT_IDST for sysregs without specific handlers
      commit: d78a14decd494caf72ea0144624621e7e43ae451
[5/9] KVM: arm64: Handle CSSIDR2_EL1 and SMIDR_EL1 in a generic way
      commit: f07ef1bef67ca08799df262cc901971ac274783d
[6/9] KVM: arm64: Force trap of GMID_EL1 when the guest doesn't have MTE
      commit: 70a5ce4efc0e1194718aad6f26332c99e6a119db
[7/9] KVM: arm64: pkvm: Add a generic synchronous exception injection primitive
      commit: e5d40a5a97c1d57e89aa5f324734065c6580b436
[8/9] KVM: arm64: pkvm: Report optional ID register traps with a 0x18 syndrome
      commit: 592dc2c020686536dae1c427c78cf558a3df4414
[9/9] KVM: arm64: selftests: Add a test for FEAT_IDST
      commit: b638a9d0f8965b98403022cb91d8f3b31170eb35

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.