linux-kernel - [PATCH v2 2/2] KVM: arm64: support some optional calls of FF-A v1.2

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Message-Id: <20251030102245.2313898-3-yeoreum.yun@arm.com>
Date: Thu, 30 Oct 2025 10:22:45 +0000
From: Yeoreum Yun <yeoreum.yun@....com>
To: maz@...nel.org,
	oliver.upton@...ux.dev,
	joey.gouly@....com,
	suzuki.poulose@....com,
	yuzenghui@...wei.com,
	catalin.marinas@....com,
	will@...nel.org,
	perlarsen@...gle.com,
	ayrton@...gle.com,
	ben.horgan@....com,
	sudeep.holla@....com,
	stuart.yoder@....com
Cc: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Yeoreum Yun <yeoreum.yun@....com>
Subject: [PATCH v2 2/2] KVM: arm64: support some optional calls of FF-A v1.2

To support drivers or components that implement their services using
FFA_DIRECT_REQ2/FFA_DIRECT_RESP2 (e.g., the TPM driver using CRB over FF-A)
and obtain related partition information via FFA_PARTITION_INFO_GET_REG,
enable pKVM to support both FFA_DIRECT_REQ2/FFA_DIRECT_RESP2
and FFA_PARTITION_INFO_GET_REG.

Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>
---
 arch/arm64/kvm/hyp/nvhe/ffa.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/ffa.c b/arch/arm64/kvm/hyp/nvhe/ffa.c
index 0ae87ff61758..81e8b33bbdd3 100644
--- a/arch/arm64/kvm/hyp/nvhe/ffa.c
+++ b/arch/arm64/kvm/hyp/nvhe/ffa.c
@@ -679,10 +679,7 @@ static bool ffa_call_supported(u64 func_id)
 	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 */
 		return false;
 	}
 
-- 
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}