Hi Eric

On  Wed, 18 Nov 2020 12:21:43, Eric Auger wrote:
>@@ -1710,7 +1710,11 @@ static void arm_smmu_tlb_inv_context(void *cookie)
>        * insertion to guarantee those are observed before the TLBI. Do be
>        * careful, 007.
>        */
>-      if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
>+      if (ext_asid >= 0) { /* guest stage 1 invalidation */
>+              cmd.opcode      = CMDQ_OP_TLBI_NH_ASID;
>+              cmd.tlbi.asid   = ext_asid;
>+              cmd.tlbi.vmid   = smmu_domain->s2_cfg.vmid;
>+      } else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {

Found a problem here, the cmd for guest stage 1 invalidation is built,
but it is not delivered to smmu.
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