linux-kernel - [PATCH v9 4/6] KVM: arm64: Mark optional FF-A 1.2 interfaces as unsupported

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Message-Id: <20250730-virtio-msg-ffa-v9-4-7f1b55c8d149@google.com>
Date: Wed, 30 Jul 2025 21:15:07 +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 4/6] KVM: arm64: Mark optional FF-A 1.2 interfaces as
 unsupported

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

Mark FF-A 1.2 interfaces as unsupported lest they get proxied. Also mark
FFA_EL3_INTR_HANDLE as unsupported as it is only valid for physical
instances.

Signed-off-by: Per Larsen <perlarsen@...gle.com>
---
 arch/arm64/kvm/hyp/nvhe/ffa.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c
index 48183fa78014e420372c4fb5e489519bc652bf53..7fe96fe626d630a9009551e8dec1683617acafbd 100644
--- a/arch/arm64/kvm/hyp/nvhe/ffa.c
+++ b/arch/arm64/kvm/hyp/nvhe/ffa.c
@@ -674,6 +674,13 @@ static bool ffa_call_supported(u64 func_id)
 	case FFA_NOTIFICATION_SET:
 	case FFA_NOTIFICATION_GET:
 	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 */
+	case FFA_CONSOLE_LOG:			/* Optional per 13.1: not in Table 13.1 */
+	case FFA_PARTITION_INFO_GET_REGS:	/* Optional for virtual instances per 13.1 */
+	/* Unsupported interfaces added in FF-A 1.2 */
+	case FFA_EL3_INTR_HANDLE:		/* Only valid for secure physical instances */
 		return false;
 	}
 

-- 
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