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 87615FF885E for ; Mon, 27 Apr 2026 08:54:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/Lj+o+O1JoF8LK+oXHu+GMeRyLetKQ1eIT0xiLmHnvE=; b=Ti8WHGsafdMdkRHQ7pEJmvBPrS fLzXn4tKP7ZmSVm/PI+9jChubAPfHD4c6ruOMJ+XS642n4XqtK0Adu13RRUcl4qKtmu6OyUHUp1BP 0XYbENUuM7VB3/C8oDdumWQl66R0ukeUobOfbfjdJHgNlqahv6RWROKHXwzBKUQQH9bErG7W8guMZ wwlgGjWIYd1i9bQXpoc0NB0Un3c6S54F4eUYhWuqjcdchc8Vstl1NXPcabtqXqEoxCDndJJRN94v6 6g5JRd9MPy1jQW4oruwUzJODF2Nrr4hF/rnXYqPpRcjalNAfe/BkfQmMtaJs0Bq2300vX6eJhVOjT CRS5kLdA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHHjt-0000000GVBC-3vsB; Mon, 27 Apr 2026 08:54:49 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHHjl-0000000GV34-1hGT for linux-arm-kernel@lists.infradead.org; Mon, 27 Apr 2026 08:54:42 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 03114435B3; Mon, 27 Apr 2026 08:54:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32838C2BCB4; Mon, 27 Apr 2026 08:54:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777280080; bh=rtTVLA/VJy6evbm/ivqwSH7GHIN3HGJDjRTvLrxIYOo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FYA+IKY2frtx6nmf4OwXRF+4boBROWsLfWGDclUZDZ3h5mqiGfUfCWy45DliG73NY DtVPJ/m6kJpKw3HhNuU7N99Gq8aaEgOkJJ5ZvsOWPSsRnsRRQAmzH7gYIqaIfkM1Xt BuAT5BtWdk2BvpXZQKXqS12IVLeLiuckuqhsVvT2i7UfPf/aefweHiOEG5DB4q1P8b YXR5HKtvCK/LN5nj2N7Y8RtzQOao8iQ4lG8IDzA8FZcdF+rxKOylZur4oYk5kBi09R axWzFwThdcRMCtAAeHxsu0XC73e8YuLlG+bWLJFUU6Utq8QCBXxsV+ocus76UzhjuD M3bkYAFfbkP5w== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: "Aneesh Kumar K.V (Arm)" , Alexey Kardashevskiy , Catalin Marinas , Dan Williams , Jason Gunthorpe , Joerg Roedel , Jonathan Cameron , Marc Zyngier , Nicolin Chen , Pranjal Shrivastava , Robin Murphy , Samuel Ortiz , Steven Price , Suzuki K Poulose , Will Deacon , Xu Yilun Subject: [RFC PATCH v4 07/16] coco: host: arm64: Add pdev stream key refresh and purge helpers Date: Mon, 27 Apr 2026 14:23:35 +0530 Message-ID: <20260427085344.941627-8-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260427085344.941627-1-aneesh.kumar@kernel.org> References: <20260427085344.941627-1-aneesh.kumar@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260427_015441_487558_8C8F0B00 X-CRM114-Status: GOOD ( 12.22 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add RMI command wrappers for PDEV stream key refresh and key purge, and plumb them into arm-cca host helper functions. The new helpers follow the existing stream operation pattern: issue the RMI command for the local and optional peer pdev, then run the shared stream synchronization work before returning. This prepares the arm-cca host code to refresh or purge stream keys during later vdev and stream state transitions. Signed-off-by: Aneesh Kumar K.V (Arm) --- arch/arm64/include/asm/rmi_cmds.h | 24 +++++++++++++++++ drivers/virt/coco/arm-cca-host/rmi-da.c | 35 +++++++++++++++++++++++++ drivers/virt/coco/arm-cca-host/rmi-da.h | 4 +++ 3 files changed, 63 insertions(+) diff --git a/arch/arm64/include/asm/rmi_cmds.h b/arch/arm64/include/asm/rmi_cmds.h index 242ce2fac14e..03dffba763e1 100644 --- a/arch/arm64/include/asm/rmi_cmds.h +++ b/arch/arm64/include/asm/rmi_cmds.h @@ -925,4 +925,28 @@ static inline unsigned long rmi_vdev_lock(unsigned long rd, return res.a0; } +static inline unsigned long rmi_pdev_stream_key_refresh(unsigned long pdev1_phys, + unsigned long pdev2_phys, unsigned long stream_handle) +{ + + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_PDEV_STREAM_KEY_REFRESH, pdev1_phys, + pdev2_phys, stream_handle, &res); + + return res.a0; +} + +static inline unsigned long rmi_pdev_stream_key_purge(unsigned long pdev1_phys, + unsigned long pdev2_phys, unsigned long stream_handle) +{ + + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_PDEV_STREAM_KEY_PURGE, pdev1_phys, + pdev2_phys, stream_handle, &res); + + return res.a0; +} + #endif /* __ASM_RMI_CMDS_H */ diff --git a/drivers/virt/coco/arm-cca-host/rmi-da.c b/drivers/virt/coco/arm-cca-host/rmi-da.c index 84f0b2211cd1..128079d5b993 100644 --- a/drivers/virt/coco/arm-cca-host/rmi-da.c +++ b/drivers/virt/coco/arm-cca-host/rmi-da.c @@ -1038,3 +1038,38 @@ void *cca_vdev_create(struct realm *realm, struct pci_dev *pdev, err_out: return ERR_PTR(ret); } + +int cca_pdev_refresh_stream_key(struct pci_dev *pdev1, + struct pci_dev *pdev2, unsigned long stream_handle) +{ + + phys_addr_t rmm_pdev2_phys = 0; + struct cca_host_pdev_dsc *pdev_dsc1 = to_cca_pdev_dsc(pdev1); + + if (pdev2) + rmm_pdev2_phys = virt_to_phys(to_cca_pdev_dsc(pdev2)->rmm_pdev); + + if (rmi_pdev_stream_key_refresh(virt_to_phys(pdev_dsc1->rmm_pdev), + rmm_pdev2_phys, stream_handle)) + return -EIO; + + return submit_stream_work(pdev1, pdev2, stream_handle); +} + + +int cca_pdev_purge_stream_key(struct pci_dev *pdev1, + struct pci_dev *pdev2, unsigned long stream_handle) +{ + + phys_addr_t rmm_pdev2_phys = 0; + struct cca_host_pdev_dsc *pdev_dsc1 = to_cca_pdev_dsc(pdev1); + + if (pdev2) + rmm_pdev2_phys = virt_to_phys(to_cca_pdev_dsc(pdev2)->rmm_pdev); + + if (rmi_pdev_stream_key_purge(virt_to_phys(pdev_dsc1->rmm_pdev), + rmm_pdev2_phys, stream_handle)) + return -EIO; + + return submit_stream_work(pdev1, pdev2, stream_handle); +} diff --git a/drivers/virt/coco/arm-cca-host/rmi-da.h b/drivers/virt/coco/arm-cca-host/rmi-da.h index cd13cbf650d5..d6cdbc638d6d 100644 --- a/drivers/virt/coco/arm-cca-host/rmi-da.h +++ b/drivers/virt/coco/arm-cca-host/rmi-da.h @@ -235,5 +235,9 @@ int cca_pdev_disconnect_stream(struct pci_dev *pdev1, struct pci_dev *pdev2, unsigned long stream_handle); void *cca_vdev_create(struct realm *realm, struct pci_dev *pdev, struct pci_dev *pf0_dev, u32 guest_rid); +int cca_pdev_refresh_stream_key(struct pci_dev *pdev1, + struct pci_dev *pdev2, unsigned long stream_handle); +int cca_pdev_purge_stream_key(struct pci_dev *pdev1, + struct pci_dev *pdev2, unsigned long stream_handle); #endif -- 2.43.0