linux-kernel - [PATCH v11 6/6] KVM: arm64: Bump the supported version of FF-A to 1.2

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Message-Id: <20250820-virtio-msg-ffa-v11-6-497ef43550a3@google.com>
Date: Wed, 20 Aug 2025 01:10:10 +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 v11 6/6] KVM: arm64: Bump the supported version of FF-A to
 1.2

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

FF-A version 1.2 introduces the DIRECT_REQ2 ABI. Bump the FF-A version
preferred by the hypervisor to enable implementation of the 1.2-only
FFA_MSG_SEND_DIRECT_REQ2 and FFA_MSG_SEND_RESP2 messaging interfaces.

Co-developed-by: Ayrton Munoz <ayrton@...gle.com>
Signed-off-by: Ayrton Munoz <ayrton@...gle.com>
Acked-by: Will Deacon <will@...nel.org>
Signed-off-by: Per Larsen <perlarsen@...gle.com>
---
 arch/arm64/kvm/hyp/nvhe/ffa.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c
index a8ec1a94f3f8a86551895f4606918246c4ac1f39..4e16f9b96f637599873b16148c6e40cf1210aa3e 100644
--- a/arch/arm64/kvm/hyp/nvhe/ffa.c
+++ b/arch/arm64/kvm/hyp/nvhe/ffa.c
@@ -936,7 +936,7 @@ int hyp_ffa_init(void *pages)
 
 	arm_smccc_1_2_smc(&(struct arm_smccc_1_2_regs) {
 		.a0 = FFA_VERSION,
-		.a1 = FFA_VERSION_1_1,
+		.a1 = FFA_VERSION_1_2,
 	}, &res);
 	if (res.a0 == FFA_RET_NOT_SUPPORTED)
 		return 0;
@@ -957,10 +957,10 @@ int hyp_ffa_init(void *pages)
 	if (FFA_MAJOR_VERSION(res.a0) != 1)
 		return -EOPNOTSUPP;
 
-	if (FFA_MINOR_VERSION(res.a0) < FFA_MINOR_VERSION(FFA_VERSION_1_1))
+	if (FFA_MINOR_VERSION(res.a0) < FFA_MINOR_VERSION(FFA_VERSION_1_2))
 		hyp_ffa_version = res.a0;
 	else
-		hyp_ffa_version = FFA_VERSION_1_1;
+		hyp_ffa_version = FFA_VERSION_1_2;
 
 	tx = pages;
 	pages += KVM_FFA_MBOX_NR_PAGES * PAGE_SIZE;

-- 
2.51.0.rc1.167.g924127e9c0-goog