linux-kernel - [PATCH v2] scsi: ufs: ufs-pci: Add support for QEMU

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Date:   Mon, 07 Aug 2023 10:37:26 +0900
From:   Jeuk Kim <jeuk20.kim@...sung.com>
To:     "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "bvanassche@....org" <bvanassche@....org>,
        Jeuk Kim <jeuk20.kim@...sung.com>,
        "avri.altman@....com" <avri.altman@....com>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] scsi: ufs: ufs-pci: Add support for QEMU

To ensure that the pci based QEMU ufs device properly works with linux,
register the device id (0x0013) and vendor id (0x1b36) of QEMU ufs device.

QEMU UFS will enable testing of the UFS driver inside a virtual machine
on systems without UFS host controller. It can also be used to preemptively
implement and test new features before the real device is created.

The new qemu ufs device can be found at
https://lore.kernel.org/qemu-devel/20230727155239.GA979354@fedora

Signed-off-by: Jeuk Kim <jeuk20.kim@...sung.com>
---

Since v1:
- Based on Adrian's comment, I modified the commit message to be
  more detailed.

---
 drivers/ufs/host/ufshcd-pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ufs/host/ufshcd-pci.c b/drivers/ufs/host/ufshcd-pci.c
index cf3987773051..29d322931427 100644
--- a/drivers/ufs/host/ufshcd-pci.c
+++ b/drivers/ufs/host/ufshcd-pci.c
@@ -590,6 +590,7 @@ static const struct dev_pm_ops ufshcd_pci_pm_ops = {
 };
 
 static const struct pci_device_id ufshcd_pci_tbl[] = {
+	{ PCI_VENDOR_ID_REDHAT, 0x0013, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 	{ PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 	{ PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
 	{ PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_ehl_hba_vops },
-- 
2.34.1