linux-kernel - [PATCH v8 4/7] KVM: arm64: Mark optional FF-A 1.2 interfaces as unsupported

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Message-Id: <20250719-virtio-msg-ffa-v8-4-03e8e8dbe856@google.com>
Date: Sat, 19 Jul 2025 02:11:26 +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 v8 4/7] KVM: arm64: Mark optional FF-A 1.2 interfaces as
 unsupported

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

Update ffa_call_supported to mark FF-A 1.2 interfaces as unsupported
lest they get forwarded. FFA_MSG_SEND_DIRECT_REQ2 is not marked as
unsupported because a later patch in this series adds support.

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 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c
index 50ec52bcce4b4443c2f3ffeda455594733f3a5a0..5a173ea481940236356e2bc4248d094a858a0923 100644
--- a/arch/arm64/kvm/hyp/nvhe/ffa.c
+++ b/arch/arm64/kvm/hyp/nvhe/ffa.c
@@ -671,6 +671,12 @@ 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_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;
 	}
 

-- 
2.50.0.727.gbf7dc18ff4-goog