Commit a0aae0a9 authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

KVM: arm64: Advertise FGT2 registers to userspace 



While a guest is able to use the FEAT_FGT2 registers, we're missing
them being exposed to userspace. Add them to the (very long) list.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250714122634.3334816-9-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 72c62700

arch/arm64/kvm/sys_regs.c

+15 −0
Original line number Diff line number Diff line
@@ -2592,6 +2592,16 @@ static unsigned int tcr2_el2_visibility(const struct kvm_vcpu *vcpu, 
	return __el2_visibility(vcpu, rd, tcr2_visibility);

}



static unsigned int fgt2_visibility(const struct kvm_vcpu *vcpu,

				    const struct sys_reg_desc *rd)

{

	if (el2_visibility(vcpu, rd) == 0 &&

	    kvm_has_feat(vcpu->kvm, ID_AA64MMFR0_EL1, FGT, FGT2))

		return 0;



	return REG_HIDDEN;

}



static unsigned int fgt_visibility(const struct kvm_vcpu *vcpu,

				   const struct sys_reg_desc *rd)

{
@@ -3341,9 +3351,14 @@ static const struct sys_reg_desc sys_reg_descs[] = { 
			 vncr_el2_visibility),



	{ SYS_DESC(SYS_DACR32_EL2), undef_access, reset_unknown, DACR32_EL2 },

	EL2_REG_VNCR_FILT(HDFGRTR2_EL2, fgt2_visibility),

	EL2_REG_VNCR_FILT(HDFGWTR2_EL2, fgt2_visibility),

	EL2_REG_VNCR_FILT(HFGRTR2_EL2, fgt2_visibility),

	EL2_REG_VNCR_FILT(HFGWTR2_EL2, fgt2_visibility),

	EL2_REG_VNCR_FILT(HDFGRTR_EL2, fgt_visibility),

	EL2_REG_VNCR_FILT(HDFGWTR_EL2, fgt_visibility),

	EL2_REG_VNCR_FILT(HAFGRTR_EL2, fgt_visibility),

	EL2_REG_VNCR_FILT(HFGITR2_EL2, fgt2_visibility),

	EL2_REG_REDIR(SPSR_EL2, reset_val, 0),

	EL2_REG_REDIR(ELR_EL2, reset_val, 0),

	{ SYS_DESC(SYS_SP_EL1), access_sp_el1},