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Message-Id: <20250730-virtio-msg-ffa-v9-3-7f1b55c8d149@google.com>
Date: Wed, 30 Jul 2025 21:15:06 +0000
From: Per Larsen via B4 Relay <devnull+perlarsen.google.com@...nel.org>
To: Marc Zyngier <maz@...nel.org>, Oliver Upton <oliver.upton@...ux.dev>, 
 Joey Gouly <joey.gouly@....com>, Suzuki K Poulose <suzuki.poulose@....com>, 
 Zenghui Yu <yuzenghui@...wei.com>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
 Sudeep Holla <sudeep.holla@....com>
Cc: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, ahomescu@...gle.com, armellel@...gle.com, 
 arve@...roid.com, ayrton@...gle.com, qperret@...gle.com, 
 sebastianene@...gle.com, qwandor@...gle.com, 
 Per Larsen <perlarsen@...gle.com>
Subject: [PATCH v9 3/6] KVM: arm64: Mark FFA_NOTIFICATION_* calls as
 unsupported

From: Per Larsen <perlarsen@...gle.com>

Prevent FFA_NOTIFICATION_* interfaces from being passed through to TZ.

Acked-by: Will Deacon <will@...nel.org>
Signed-off-by: Per Larsen <perlarsen@...gle.com>
---
 arch/arm64/kvm/hyp/nvhe/ffa.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c
index e66149d40c967c14742087d9b45970435d3f2c75..48183fa78014e420372c4fb5e489519bc652bf53 100644
--- a/arch/arm64/kvm/hyp/nvhe/ffa.c
+++ b/arch/arm64/kvm/hyp/nvhe/ffa.c
@@ -666,6 +666,14 @@ 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_BITMAP_CREATE:
+	case FFA_NOTIFICATION_BITMAP_DESTROY:
+	case FFA_NOTIFICATION_BIND:
+	case FFA_NOTIFICATION_UNBIND:
+	case FFA_NOTIFICATION_SET:
+	case FFA_NOTIFICATION_GET:
+	case FFA_NOTIFICATION_INFO_GET:
 		return false;
 	}
 

-- 
2.50.1.552.g942d659e1b-goog



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