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Make sure that the SBZ fields are enforced. Signed-off-by: Sebastian Ene Reviewed-by: Vincent Donnefort --- arch/arm64/kvm/hyp/nvhe/ffa.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 053efd99bf11..5539fb0d246e 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -717,8 +717,6 @@ static bool ffa_call_supported(u64 func_id) case FFA_RXTX_MAP: case FFA_MEM_DONATE: case FFA_MEM_RETRIEVE_REQ: - /* Optional notification interfaces added in FF-A 1.1 */ - case FFA_NOTIFICATION_INFO_GET: /* Optional interfaces added in FF-A 1.2 */ case FFA_MSG_SEND_DIRECT_REQ2: /* Optional per 7.5.1 */ case FFA_MSG_SEND_DIRECT_RESP2: /* Optional per 7.5.1 */ @@ -1028,6 +1026,20 @@ static void do_ffa_notif_get(struct arm_smccc_1_2_regs *res, hyp_smccc_1_2_smc(args, res); } +static void do_ffa_notif_info_get(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + struct arm_smccc_1_2_regs *args; + + if (ffa_check_unused_args_sbz(ctxt, 1)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + args = (void *)&ctxt->regs.regs[0]; + hyp_smccc_1_2_smc(args, res); +} + bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) { struct arm_smccc_1_2_regs res; @@ -1107,6 +1119,10 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_GET: do_ffa_notif_get(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_INFO_GET: + case FFA_FN64_NOTIFICATION_INFO_GET: + do_ffa_notif_info_get(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.55.0.rc0.786.g65d90a0328-goog