From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3C33FFF885A for ; Fri, 1 May 2026 05:34:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=3YUAJrM9Ye5UIsfItkrd6LMiR8gGeYfLiey9fL6OXNI=; b=cRYk9VYhAJtJQ6FKPWFfSw//pO 8oZMBA4i3DQ/75Gm2NXqtwcczfnWMlBCOK2AxkR+WuOiwiuwM0IN77DlLu5DPrE7gMApPq7/PjzA0 2lmzs5cGRadjkU49VNV0aFtwZGi1MRKJvIkmMsCHlSQ6iyg7P7zXn3D5GBAQMsLNKmLZIOE9Bx96w PZvVoN46vUPZEnGI7GUmHukkBHbxtXhlJG2CrHTfA0NLUxRkuLJLIqRBfOs0TEgZz5iZ9AW2hd0cW N4xpJZVMUiOA7D4jtI9dG0Vz8NIm/w3Veo/Zszz3H4to43drF1gySIu9SARE52NBlFt/zhzSCeSqX TlHrN7Bg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIgWS-00000006Nm3-4A7q; Fri, 01 May 2026 05:34:44 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIgWR-00000006NlX-2LA0 for linux-arm-kernel@lists.infradead.org; Fri, 01 May 2026 05:34:43 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 8A7A860142; Fri, 1 May 2026 05:34:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 3600EC2BCB7; Fri, 1 May 2026 05:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777613682; bh=IJOP1QjdMLA8jJRRjWnWIz8Iw1BhlCSTBd7eJQAsNEI=; h=From:Subject:Date:To:Cc:Reply-To:From; b=lOnYNEzjdOpa0zWPH1tEHfDVYSeFS1QHtSCzZ81uSrxOu0Vc6T0dVEigXWhSXLZMi vSdPqPyXUHkk139BiDdEkIyS36JGrwfMahbshqmV6JCjZ1K1fOdf7lbeI3WxikWsJL VL4V8ShWuZtXRc6XfxZfk9bGhq4v6RIgk8oblz88etB3cMhTP7wryQU3Advnlcwv9s mgRuwWfyKrEUhtQ4iL41eOvD/d0Ck0FNrobCh+yUJq33ApVhU9W1U3Q0XRNVrpL+DM DGvzZnkwrf34txyisZxlJ91S2LU1Q8W3cjwQLWsnedM7pm75loJx/uw0SIAmuH5y6+ b8tseDs467msw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22412CD13DE; Fri, 1 May 2026 05:34:42 +0000 (UTC) From: Per Larsen via B4 Relay Subject: [PATCH v6 0/2] KVM: arm64: Support FF-A direct messaging interfaces Date: Fri, 01 May 2026 05:34:31 +0000 Message-Id: <20260501-host-direct-messages-v6-0-3f4af727ed85@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAGc79GkC/43P3UrEMBAF4FdZcm0kM/lrvfI9xItuMmkD7kaSE nZZ+u6mi6JSC16egflmzo0VypEKezrcWKYaS0znFszDgblpOI/Eo2+ZoUANAns+pTJzHzO5mZ+ olGGkwjUK8DZoPRw9a6vvmUK83NmX15anWOaUr/crFdbpJyjF32AFLrgykrTtLLguPI8pjW/06 NKJrWLF/yjYlD6gdRSksVJsFPmtAOyUq7IpziovVK/UEc1GUV+KESD2FLX+ov2gEMFDt1X0DwV hR9FNQQcGlOsVdb8bLcvyAXfhNLbRAQAA X-Change-ID: 20251029-host-direct-messages-5201d7f55abd To: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Yeoreum Yun , Ben Horgan , Oliver Upton Cc: Armelle Laine , Sebastien Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Per Larsen X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777613681; l=2488; i=perlarsen@google.com; s=20250508; h=from:subject:message-id; bh=IJOP1QjdMLA8jJRRjWnWIz8Iw1BhlCSTBd7eJQAsNEI=; b=Dxaofd6X807oR6U7U5Ui78E2f1FQFaKs+SYpUR/QH2ZGlXVKOHPM2gU7WiDfchfvm474lHDdW 6ap1TvouJE/B4+slty0QWylyDymrQq7O7EdqI58zasLyndB4zXrHwwM X-Developer-Key: i=perlarsen@google.com; a=ed25519; pk=jjc/Ta4VmrLRmMoahP6d1mBcKzvWU+nsmdtYe2oS2kQ= X-Endpoint-Received: by B4 Relay for perlarsen@google.com/20250508 with auth_id=402 X-Original-From: Per Larsen X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: perlarsen@google.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Support FFA_MSG_SEND_DIRECT_REQ unconditionally. Support FFA_MSG_SEND_DIRECT_REQ2 if hypervisor negotiated version 1.2+. Framework messages (FF-A control plane) are filtered out. For FFA_MSG_SEND_DIRECT_REQ, we look at flags in w2. Messages using the REQ2 interface are always partition messages. The second patch was part of a previous patch set [0] but was dropped since the use case was unclear. A clear use case has now appeared: use TPM device with CRB over FF-A when kernel boots with pkvm [1]. Tested by booting Android under QEMU. Best Regards, Per [0]: https://lore.kernel.org/all/20250730-virtio-msg-ffa-v9-0-7f1b55c8d149@google.com/ [1]: https://lore.kernel.org/all/20251027191729.1704744-1-yeoreum.yun@arm.com/ Signed-off-by: Per Larsen --- Changes in v6: - 1/2: validate that bits 31:16 of w1 is HOST_FFA_ID. - Link to v5: https://lore.kernel.org/r/20260121-host-direct-messages-v5-0-2c1614c94e80@google.com Changes in v5: - 1/2: do_ffa_direct_msg: validate that sender is HOST_FFA_ID. - Link to v4: https://lore.kernel.org/r/20260109-host-direct-messages-v4-0-95da4221d186@google.com Changes in v4: - 1/2: do_ffa_direct_msg: check that flag in w2 is zero; drop unused vm_handle parameter. - 2/2: ffa_call_supported: simplify logic by reordering cases. - do_ffa_direct_msg: switch polarity of check and update comment. - Link to v3: https://lore.kernel.org/r/20251119-host-direct-messages-v3-0-c74d04944b26@google.com Changes in v3: - Filter out framework messages as suggested by Will Deacon. Update cover letter accordingly. - Update trailers: Reviewed-by: Yeoreum Yun - Link to v2: https://lore.kernel.org/r/20251030-host-direct-messages-v2-0-9f27cef36730@google.com Changes in v2: - 1/2: Drop support for FFA_ID_GET interface in host handler. - Link to v1: https://lore.kernel.org/r/20251030-host-direct-messages-v1-0-463e57871c8f@google.com --- Per Larsen (1): KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ2 in host handler Sebastian Ene (1): KVM: arm64: Support FFA_MSG_SEND_DIRECT_REQ in host handler arch/arm64/kvm/hyp/nvhe/ffa.c | 39 ++++++++++++++++++++++++++++++++++++++- include/linux/arm_ffa.h | 2 ++ 2 files changed, 40 insertions(+), 1 deletion(-) --- base-commit: 26fd6bff2c050196005312d1d306889220952a99 change-id: 20251029-host-direct-messages-5201d7f55abd Best regards, -- Per Larsen