From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC9673822A1; Mon, 27 Apr 2026 08:54:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777280081; cv=none; b=TcdGSqm62poQgS4SBIywV5+3o7ngchIXhjBS8P3VZ3JZ+TSRBAUnbE2bzaF/Hpq8sJ1Tzd7lvh9eI+NEKZk+6eGstWKUKp1aIu0b1rCrvlwvqYEvGiLkdKfqGKNx5qrt0dXSwZX5v87ChdHFr6buS1NAB3Y4IY3X81VM9IeTSSM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777280081; c=relaxed/simple; bh=rtTVLA/VJy6evbm/ivqwSH7GHIN3HGJDjRTvLrxIYOo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eHeu/fewJNOloTFtpgWiowjChfSqVuYKV6UPlnWQDqTIADKARMiF0rcMEOrinxp025joH+mANxDAtsRNpmaXUZfuFJgGa33mBmcsNkg38c+W7ZGZn0VBxt3FJ9ApLWORWOyG3AxgilcGfotN+yTUfFTwsAdbh8PiRPtFkVNj51Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FYA+IKY2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FYA+IKY2" 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> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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