From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C03E649DB8B; Thu, 10 Sep 2026 14:05:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049148; cv=none; b=ZjRoMxAV28a7U0RNq6vAB7La2JNJ8gPm9v+n624wOc85TyFFprRJ1y8LS6nv1ItfargKnHr+3FFkHPcOJodOajoYqNbVzQ/5T5cs5MV0yv4n9Od5i7FhPFy8w/G22m4DHak//pCiZDl0topjzsZ2lJsOgTrCc3+904y7PXxY8P4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049148; c=relaxed/simple; bh=j2vpmR9myFwAcMjs58RSG+Vi3DV7VWhNBTVrLRXGffI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FU5rj/JK5b5UdLbKRd/LAeGb3glt9a7gNdC0mIn83/AnHLA8QB01/L1em/dXVQX+hOsR2i+Bghmns4pAqCgwxpGO1oulKDgKYYwYL+bnpAzh6ohdJunPWE9WvnUFt2B7vCaSUiNV/qa2p43ZTzlpdXFwkNZ9C0NctD9CHPTMfPQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JXqZJQPN; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JXqZJQPN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6310D1F000FF; Thu, 10 Sep 2026 14:05:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049146; bh=luXs/S+Jd2KjBu4OQ9brsQHU+FfslBl2cNL4bNycYLc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=JXqZJQPNFlO9/UykM96CLppxtOFbk0Ol3RL7i4VXURo6OoPYE7Hio1SE7ITiM4wGD bJV9HBk/AGRRnoLBB1u8cVw4BU/btRgxNwlPzPDvBhVSzWUWd5SZv62qc0MWtVn1hq seBdwbFLXvofdWfGxSy2ip3TAEOlzCqRebgE9uDAamx14h+JunJCfRxd9yX6fz6cw+ H7kXv3GdUeQmkdapzX7nwbN7oJ3WscH+1eBdPZk1WRoyVOPjvA1OkuI76LDUtid1V0 ZARQhoAx9SFuWFVe8IKoftnCGjaJnrF5ZXG6pX+yi3EQaY+k+zLrsqs8i/3qBvqwB+ jVvNbOcKCvT4Q== 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 , Jonathan Cameron , Marc Zyngier , Samuel Ortiz , Steven Price , Suzuki K Poulose , Will Deacon , Xu Yilun Subject: [PATCH v5 04/15] coco: host: arm64: Add RMM pdev stop and destroy helper Date: Thu, 10 Sep 2026 19:34:57 +0530 Message-ID: <20260910140509.868402-5-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260910140509.868402-1-aneesh.kumar@kernel.org> References: <20260910140509.868402-1-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add the host-side helper needed to tear down an RMM pdev object once later disconnect and error paths are wired up. Describe RMI_PDEV_STOP and RMI_PDEV_DESTROY, add the PDEV_STOP SMCCC wrapper, and issue PDEV_DESTROY through the SRO helper. The new teardown helper stops the pdev, drives device communication until RMM reports RMI_PDEV_STOPPED, destroys the RMM object, releases cached PF0 device-communication state, and undelegates the backing granule. No caller is added here; this prepares the teardown side of the RMM pdev lifecycle for the follow-up patches that connect it to IDE stream disconnect. Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/virt/coco/arm-cca-host/rmi-da.c | 47 ++++++++++++++++++++++++- drivers/virt/coco/arm-cca-host/rmi-da.h | 1 + include/linux/arm-rmi-cmds.h | 9 +++++ 3 files changed, 56 insertions(+), 1 deletion(-) diff --git a/drivers/virt/coco/arm-cca-host/rmi-da.c b/drivers/virt/coco/arm-cca-host/rmi-da.c index 495a3bd2798f..7a72e8eead90 100644 --- a/drivers/virt/coco/arm-cca-host/rmi-da.c +++ b/drivers/virt/coco/arm-cca-host/rmi-da.c @@ -394,7 +394,7 @@ static void pdev_state_transition_workfn(struct work_struct *work) WARN_ON(state != setup_work->target_state); } -static int __maybe_unused submit_pdev_state_transition_work(struct pci_dev *pdev, +static int submit_pdev_state_transition_work(struct pci_dev *pdev, enum rmi_pdev_state target_state) { enum rmi_pdev_state state; @@ -420,3 +420,48 @@ static int __maybe_unused submit_pdev_state_transition_work(struct pci_dev *pdev return -1; return 0; } + +static inline int rmi_pdev_destroy(unsigned long pdev_phys, + unsigned long *rmi_ret) +{ + struct rmi_sro_state *sro __free(kfree) = kmalloc_obj(*sro); + if (!sro) + return -ENOMEM; + + *rmi_ret = rmi_sro_memxfer_cmd(sro, GFP_KERNEL, + SMC_RMI_PDEV_DESTROY, pdev_phys); + + return 0; +} + +void cca_pdev_stop_and_destroy(struct pci_dev *pdev) +{ + int ret; + unsigned long rmi_ret; + struct cca_host_pdev_dsc *pdev_dsc = to_cca_pdev_dsc(pdev); + struct cca_host_pf0_ep_dsc *pf0_ep_dsc = to_cca_pf0_ep_dsc(pdev); + phys_addr_t rmm_pdev_phys = virt_to_phys(pdev_dsc->rmm_pdev); + + if (WARN_ON(rmi_pdev_stop(rmm_pdev_phys))) + return; + + ret = submit_pdev_state_transition_work(pdev, RMI_PDEV_STOPPED); + if (ret) + return; + + ret = rmi_pdev_destroy(rmm_pdev_phys, &rmi_ret); + if (WARN_ON(ret || rmi_ret)) + return; + + if (pf0_ep_dsc) { + kfree(pf0_ep_dsc->cert_chain.public_key); + kvfree(pf0_ep_dsc->cert_chain.cache); + kvfree(pf0_ep_dsc->vca); + pf0_ep_dsc->cert_chain.cache = NULL; + pf0_ep_dsc->vca = NULL; + } + + if (!rmi_undelegate_page(rmm_pdev_phys)) + free_page((unsigned long)pdev_dsc->rmm_pdev); + pdev_dsc->rmm_pdev = NULL; +} diff --git a/drivers/virt/coco/arm-cca-host/rmi-da.h b/drivers/virt/coco/arm-cca-host/rmi-da.h index 07034b034b53..f3bd106c8a54 100644 --- a/drivers/virt/coco/arm-cca-host/rmi-da.h +++ b/drivers/virt/coco/arm-cca-host/rmi-da.h @@ -133,5 +133,6 @@ static inline struct cca_host_comm_data *to_cca_comm_data(struct pci_dev *pdev) } int cca_pdev_create(struct pci_dev *pdev); +void cca_pdev_stop_and_destroy(struct pci_dev *pdev); #endif diff --git a/include/linux/arm-rmi-cmds.h b/include/linux/arm-rmi-cmds.h index c2fc80dd19cc..f947b2f4909a 100644 --- a/include/linux/arm-rmi-cmds.h +++ b/include/linux/arm-rmi-cmds.h @@ -706,4 +706,13 @@ static inline unsigned long rmi_pdev_abort(unsigned long pdev_phys) return res.a0; } +static inline unsigned long rmi_pdev_stop(unsigned long pdev_phys) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_PDEV_STOP, pdev_phys, &res); + + return res.a0; +} + #endif -- 2.43.0