diff options
| author | Sebastian Ene <sebastianene@google.com> | 2026-09-07 17:19:24 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2026-09-14 11:09:43 +0100 |
| commit | 85e44f7eeaec6c303fd6cb2d775cbfecebeb6802 (patch) | |
| tree | 5354c2c9764098e931203e0df007f109ad69488e | |
| parent | 5224e6f027ee8ba0ebc825ce80c45c0a7b716ff3 (diff) | |
KVM: arm64: Support FFA_NOTIFICATION_BIND in host handler
Verify the arguments of the FF-A notification bind call and forward the
message to Trustzone.
Reviewed-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Link: https://patch.msgid.link/20260907171930.4037166-3-sebastianene@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/ffa.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c index aa82c58380a8..89872e12f9d4 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_RECEIVER_ENDP_MASK GENMASK(15, 0) + /* * 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 @@ -692,7 +694,6 @@ 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: @@ -891,6 +892,27 @@ static void do_ffa_notif_bitmap(struct arm_smccc_1_2_regs *res, hyp_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 (FIELD_GET(FFA_NOTIF_RECEIVER_ENDP_MASK, endp_id) != HOST_FFA_ID) { + ffa_to_smccc_res(res, FFA_RET_INVALID_PARAMETERS); + return; + } + + if (flags > 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 = {0}; @@ -953,6 +975,9 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id) case FFA_NOTIFICATION_BITMAP_DESTROY: do_ffa_notif_bitmap(&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)) |