add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/x86/pci/fixup.c
..
..
@@ -7,6 +7,7 @@
7
7
 #include <linux/dmi.h>
8
8
 #include <linux/pci.h>
9
9
 #include <linux/vgaarb.h>
10
+#include <asm/amd_nb.h>
10
11
 #include <asm/hpet.h>
11
12
 #include <asm/pci_x86.h>
12
13
 
..
..
@@ -824,3 +825,23 @@
824
825
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
825
826
 
826
827
 #endif
828
+
829
+#ifdef CONFIG_AMD_NB
830
+
831
+#define AMD_15B8_RCC_DEV2_EPF0_STRAP2                                  0x10136008
832
+#define AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK       0x00000080L
833
+
834
+static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev)
835
+{
836
+	u32 data;
837
+
838
+	if (!amd_smn_read(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, &data)) {
839
+		data &= ~AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK;
840
+		if (amd_smn_write(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, data))
841
+			pci_err(dev, "Failed to write data 0x%x\n", data);
842
+	} else {
843
+		pci_err(dev, "Failed to read data\n");
844
+	}
845
+}
846
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b8, quirk_clear_strap_no_soft_reset_dev2_f0);
847
+#endif