Hey Marc,
Looks good, just a typo to fix.
On Fri, Jul 28, 2023 at 09:29:39AM +0100, Marc Zyngier wrote:
> As we're about to majorly extend the handling of FGT registers,
> restructure the code to actually save/restore the registers
> as required. This is made easy thanks to the previous addition
> of the EL2 registers, allowing us to use the host context for
> this purpose.
>
> Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Reviewed-by: Oliver Upton <oliver.upton@xxxxxxxxx>
> -static inline void __activate_traps_hfgxtr(void)
> +static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu)
> {
> + struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt;
> u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp;
> + u64 r_val, w_val;
> +
> + if (!cpus_have_final_cap(ARM64_HAS_FGT))
> + return;
> +
> + ctxt_sys_reg(hctxt, HFGRTR_EL2) = read_sysreg_s(SYS_HFGRTR_EL2);
> + ctxt_sys_reg(hctxt, HFGWTR_EL2) = read_sysreg_s(SYS_HFGWTR_EL2);
>
> if (cpus_have_final_cap(ARM64_SME)) {
> tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK;
> @@ -98,26 +97,31 @@ static inline void __activate_traps_hfgxtr(void)
> if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38))
> w_set |= HFGxTR_EL2_TCR_EL1_MASK;
>
> - sysreg_clear_set_s(SYS_HFGRTR_EL2, r_clr, r_set);
> - sysreg_clear_set_s(SYS_HFGWTR_EL2, w_clr, w_set);
> +
> + /* The default is not to trap amything but ACCDATA_EL1 */
typo: anything
--
Thanks,
Oliver
