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Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/ffa.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index 91e89d889c44..eedb01955a45 100644 --- a/arch/arm64/kvm/hyp/nvhe/ffa.c +++ b/arch/arm64/kvm/hyp/nvhe/ffa.c @@ -42,6 +42,8 @@ */ #define HOST_FFA_ID 0 +#define FFA_NOTIF_SENDER_ENDP_MASK GENMASK(31, 16) + /* * A buffer to hold the maximum descriptor size we can see from the host, * which is required when the SPMD returns a fragmented FFA_MEM_RETRIEVE_RESP @@ -688,7 +690,6 @@ static bool ffa_call_supported(u64 func_id) case FFA_MEM_DONATE: case FFA_MEM_RETRIEVE_REQ: /* Optional notification interfaces added in FF-A 1.1 */ - case FFA_NOTIFICATION_BIND: case FFA_NOTIFICATION_UNBIND: case FFA_NOTIFICATION_SET: case FFA_NOTIFICATION_GET: @@ -912,6 +913,32 @@ static void do_ffa_notif_bitmap_destroy(struct arm_smccc_1_2_regs *res, arm_smccc_1_2_smc(args, res); } +static void do_ffa_notif_bind(struct arm_smccc_1_2_regs *res, + struct kvm_cpu_context *ctxt) +{ + DECLARE_REG(u32, endp_id, ctxt, 1); + DECLARE_REG(u32, flags, ctxt, 2); + struct arm_smccc_1_2_regs *args; + + if (ffa_check_unused_args_sbz(ctxt, 5)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (FIELD_GET(FFA_NOTIF_SENDER_ENDP_MASK, endp_id) != HOST_FFA_ID) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (flags & GENMASK(31, 1)) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + args = (void *)&ctxt->regs.regs[0]; + arm_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; @@ -976,6 +1003,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_BITMAP_DESTROY: do_ffa_notif_bitmap_destroy(&res, host_ctxt); goto out_handled; + case FFA_NOTIFICATION_BIND: + do_ffa_notif_bind(&res, host_ctxt); + goto out_handled; } if (ffa_call_supported(func_id)) -- 2.54.0.1064.gd145956f57-goog