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[Xen-devel] [PATCH v4 6/6] pci: switch pci_conf_write32 to use pci_sbdf_t



This reduces the number of parameters of the function to two, and
simplifies some of the calling sites.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Brian Woods <brian.woods@xxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
Cc: Brian Woods <brian.woods@xxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 xen/arch/x86/cpu/amd.c                   |  4 ++--
 xen/arch/x86/msi.c                       | 12 ++++--------
 xen/arch/x86/oprofile/op_model_athlon.c  |  4 +++-
 xen/arch/x86/x86_64/pci.c                | 17 ++++-------------
 xen/drivers/char/ehci-dbgp.c             |  5 +++--
 xen/drivers/char/ns16550.c               | 22 ++++++++++++----------
 xen/drivers/passthrough/amd/iommu_init.c |  8 ++++----
 xen/drivers/passthrough/pci.c            |  8 ++++----
 xen/drivers/passthrough/vtd/quirks.c     |  8 ++++----
 xen/drivers/vpci/header.c                |  7 +++----
 xen/drivers/vpci/vpci.c                  |  2 +-
 xen/include/xen/pci.h                    |  4 +---
 12 files changed, 45 insertions(+), 56 deletions(-)

diff --git a/xen/arch/x86/cpu/amd.c b/xen/arch/x86/cpu/amd.c
index f66de362cb..a2f83c79a5 100644
--- a/xen/arch/x86/cpu/amd.c
+++ b/xen/arch/x86/cpu/amd.c
@@ -714,11 +714,11 @@ static void init_amd(struct cpuinfo_x86 *c)
                                       (h & 0x1) ? "clearing D18F3x5C[0]" : "");
 
                        if (l & 0x1f)
-                               pci_conf_write32(0, 0, 0x18, 0x3, 0x58,
+                               pci_conf_write32(PCI_SBDF(0, 0, 0x18, 3), 0x58,
                                                 l & ~0x1f);
 
                        if (h & 0x1)
-                               pci_conf_write32(0, 0, 0x18, 0x3, 0x5c,
+                               pci_conf_write32(PCI_SBDF(0, 0, 0x18, 3), 0x5c,
                                                 h & ~0x1);
                }
 
diff --git a/xen/arch/x86/msi.c b/xen/arch/x86/msi.c
index f3e5c5cb03..d6306005a9 100644
--- a/xen/arch/x86/msi.c
+++ b/xen/arch/x86/msi.c
@@ -251,21 +251,17 @@ static int write_msi_msg(struct msi_desc *entry, struct 
msi_msg *msg)
     {
         struct pci_dev *dev = entry->dev;
         int pos = entry->msi_attrib.pos;
-        u16 seg = dev->seg;
-        u8 bus = dev->bus;
-        u8 slot = PCI_SLOT(dev->devfn);
-        u8 func = PCI_FUNC(dev->devfn);
         int nr = entry->msi_attrib.entry_nr;
 
         ASSERT((msg->data & (entry[-nr].msi.nvec - 1)) == nr);
         if ( nr )
             return 0;
 
-        pci_conf_write32(seg, bus, slot, func, msi_lower_address_reg(pos),
+        pci_conf_write32(dev->sbdf, msi_lower_address_reg(pos),
                          msg->address_lo);
         if ( entry->msi_attrib.is_64 )
         {
-            pci_conf_write32(seg, bus, slot, func, msi_upper_address_reg(pos),
+            pci_conf_write32(dev->sbdf, msi_upper_address_reg(pos),
                              msg->address_hi);
             pci_conf_write16(dev->sbdf, msi_data_reg(pos, 1), msg->data);
         }
@@ -395,7 +391,7 @@ static bool msi_set_mask_bit(struct irq_desc *desc, bool 
host, bool guest)
             mask_bits = pci_conf_read32(pdev->sbdf, entry->msi.mpos);
             mask_bits &= ~((u32)1 << entry->msi_attrib.entry_nr);
             mask_bits |= (u32)flag << entry->msi_attrib.entry_nr;
-            pci_conf_write32(seg, bus, slot, func, entry->msi.mpos, mask_bits);
+            pci_conf_write32(pdev->sbdf, entry->msi.mpos, mask_bits);
         }
         break;
     case PCI_CAP_ID_MSIX:
@@ -716,7 +712,7 @@ static int msi_capability_init(struct pci_dev *dev,
         /* All MSIs are unmasked by default, Mask them all */
         maskbits = pci_conf_read32(dev->sbdf, mpos);
         maskbits |= ~(u32)0 >> (32 - maxvec);
-        pci_conf_write32(seg, bus, slot, func, mpos, maskbits);
+        pci_conf_write32(dev->sbdf, mpos, maskbits);
     }
     list_add_tail(&entry->list, &dev->msi_list);
 
diff --git a/xen/arch/x86/oprofile/op_model_athlon.c 
b/xen/arch/x86/oprofile/op_model_athlon.c
index 3bf0b0214d..5c48f868ae 100644
--- a/xen/arch/x86/oprofile/op_model_athlon.c
+++ b/xen/arch/x86/oprofile/op_model_athlon.c
@@ -472,7 +472,9 @@ static int __init init_ibs_nmi(void)
                                if ((vendor_id == PCI_VENDOR_ID_AMD) &&
                                        (dev_id == 
PCI_DEVICE_ID_AMD_10H_NB_MISC)) {
 
-                                       pci_conf_write32(0, bus, dev, func, 
IBSCTL,
+                                       pci_conf_write32(
+                                               PCI_SBDF(0, bus, dev, func),
+                                               IBSCTL,
                                                IBSCTL_LVTOFFSETVAL | 
APIC_EILVT_LVTOFF_IBS);
 
                                        value = pci_conf_read32(PCI_SBDF(0, 
bus, dev, func),
diff --git a/xen/arch/x86/x86_64/pci.c b/xen/arch/x86/x86_64/pci.c
index f014fe0fc5..aad1c3f7cf 100644
--- a/xen/arch/x86/x86_64/pci.c
+++ b/xen/arch/x86/x86_64/pci.c
@@ -66,19 +66,10 @@ void pci_conf_write16(pci_sbdf_t sbdf, unsigned int reg, 
uint16_t data)
         pci_conf_write(PCI_CONF_ADDRESS(sbdf, reg), reg & 2, 2, data);
 }
 
-#undef PCI_CONF_ADDRESS
-#define PCI_CONF_ADDRESS(bus, dev, func, reg) \
-    (0x80000000 | (bus << 16) | (dev << 11) | (func << 8) | (reg & ~3))
-
-void pci_conf_write32(
-    unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
-    unsigned int reg, uint32_t data)
+void pci_conf_write32(pci_sbdf_t sbdf, unsigned int reg, uint32_t data)
 {
-    if ( seg || reg > 255 )
-        pci_mmcfg_write(seg, bus, PCI_DEVFN(dev, func), reg, 4, data);
+    if ( sbdf.seg || reg > 255 )
+        pci_mmcfg_write(sbdf.seg, sbdf.bus, sbdf.devfn, reg, 4, data);
     else
-    {
-        BUG_ON((bus > 255) || (dev > 31) || (func > 7));
-        pci_conf_write(PCI_CONF_ADDRESS(bus, dev, func, reg), 0, 4, data);
-    }
+        pci_conf_write(PCI_CONF_ADDRESS(sbdf, reg), 0, 4, data);
 }
diff --git a/xen/drivers/char/ehci-dbgp.c b/xen/drivers/char/ehci-dbgp.c
index b780334953..b6e155d17b 100644
--- a/xen/drivers/char/ehci-dbgp.c
+++ b/xen/drivers/char/ehci-dbgp.c
@@ -1012,7 +1012,8 @@ static void nvidia_set_debug_port(struct ehci_dbgp *dbgp, 
unsigned int port)
 
     dword &= ~(0x0f << 12);
     dword |= (port & 0x0f) << 12;
-    pci_conf_write32(0, dbgp->bus, dbgp->slot, dbgp->func, 0x74, dword);
+    pci_conf_write32(PCI_SBDF(0, dbgp->bus, dbgp->slot, dbgp->func), 0x74,
+                     dword);
     dbgp_printk("set debug port to %u\n", port);
 }
 
@@ -1436,7 +1437,7 @@ static void ehci_dbgp_resume(struct serial_port *port)
     if ( !dbgp->ehci_debug )
         return;
 
-    pci_conf_write32(0, dbgp->bus, dbgp->slot, dbgp->func, dbgp->bar,
+    pci_conf_write32(PCI_SBDF(0, dbgp->bus, dbgp->slot, dbgp->func), dbgp->bar,
                      dbgp->bar_val);
     pci_conf_write16(PCI_SBDF(0, dbgp->bus, dbgp->slot, dbgp->func),
                      PCI_COMMAND, dbgp->pci_cr);
diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c
index 20eaecee59..e518f2d790 100644
--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -630,7 +630,8 @@ static void pci_serial_early_init(struct ns16550 *uart)
                          (uart->io_base & 0xF000) |
                          ((uart->io_base & 0xF000) >> 8));
 
-    pci_conf_write32(0, uart->ps_bdf[0], uart->ps_bdf[1], uart->ps_bdf[2],
+    pci_conf_write32(PCI_SBDF(0, uart->ps_bdf[0], uart->ps_bdf[1],
+                              uart->ps_bdf[2]),
                      PCI_BASE_ADDRESS_0,
                      uart->io_base | PCI_BASE_ADDRESS_SPACE_IO);
     pci_conf_write16(PCI_SBDF(0, uart->ps_bdf[0], uart->ps_bdf[1],
@@ -860,13 +861,14 @@ static void _ns16550_resume(struct serial_port *port)
 
     if ( uart->bar )
     {
-       pci_conf_write32(0, uart->ps_bdf[0], uart->ps_bdf[1], uart->ps_bdf[2],
+       pci_conf_write32(PCI_SBDF(0, uart->ps_bdf[0], uart->ps_bdf[1],
+                                 uart->ps_bdf[2]),
                         PCI_BASE_ADDRESS_0 + uart->bar_idx*4, uart->bar);
 
         /* If 64 bit BAR, write higher 32 bits to BAR+4 */
         if ( uart->bar & PCI_BASE_ADDRESS_MEM_TYPE_64 )
-            pci_conf_write32(0, uart->ps_bdf[0],
-                        uart->ps_bdf[1], uart->ps_bdf[2],
+            pci_conf_write32(PCI_SBDF(0, uart->ps_bdf[0],  uart->ps_bdf[1],
+                                      uart->ps_bdf[2]),
                         PCI_BASE_ADDRESS_0 + (uart->bar_idx+1)*4, uart->bar64);
 
        pci_conf_write16(PCI_SBDF(0, uart->ps_bdf[0], uart->ps_bdf[1],
@@ -1121,11 +1123,11 @@ pci_uart_config(struct ns16550 *uart, bool_t skip_amt, 
unsigned int idx)
                 /* MMIO based */
                 if ( param->mmio && !(bar & PCI_BASE_ADDRESS_SPACE_IO) )
                 {
-                    pci_conf_write32(0, b, d, f,
+                    pci_conf_write32(PCI_SBDF(0, b, d, f),
                                      PCI_BASE_ADDRESS_0 + bar_idx*4, ~0u);
                     len = pci_conf_read32(PCI_SBDF(0, b, d, f),
                                           PCI_BASE_ADDRESS_0 + bar_idx * 4);
-                    pci_conf_write32(0, b, d, f,
+                    pci_conf_write32(PCI_SBDF(0, b, d, f),
                                      PCI_BASE_ADDRESS_0 + bar_idx*4, bar);
 
                     /* Handle 64 bit BAR if found */
@@ -1133,11 +1135,11 @@ pci_uart_config(struct ns16550 *uart, bool_t skip_amt, 
unsigned int idx)
                     {
                         bar_64 = pci_conf_read32(PCI_SBDF(0, b, d, f),
                                       PCI_BASE_ADDRESS_0 + (bar_idx + 1) * 4);
-                        pci_conf_write32(0, b, d, f,
+                        pci_conf_write32(PCI_SBDF(0, b, d, f),
                                     PCI_BASE_ADDRESS_0 + (bar_idx+1)*4, ~0u);
                         len_64 = pci_conf_read32(PCI_SBDF(0, b, d, f),
                                     PCI_BASE_ADDRESS_0 + (bar_idx + 1) * 4);
-                        pci_conf_write32(0, b, d, f,
+                        pci_conf_write32(PCI_SBDF(0, b, d, f),
                                     PCI_BASE_ADDRESS_0 + (bar_idx+1)*4, 
bar_64);
                         size  = ((u64)~0 << 32) | PCI_BASE_ADDRESS_MEM_MASK;
                         size &= ((u64)len_64 << 32) | len;
@@ -1151,11 +1153,11 @@ pci_uart_config(struct ns16550 *uart, bool_t skip_amt, 
unsigned int idx)
                 /* IO based */
                 else if ( !param->mmio && (bar & PCI_BASE_ADDRESS_SPACE_IO) )
                 {
-                    pci_conf_write32(0, b, d, f,
+                    pci_conf_write32(PCI_SBDF(0, b, d, f),
                                      PCI_BASE_ADDRESS_0 + bar_idx*4, ~0u);
                     len = pci_conf_read32(PCI_SBDF(0, b, d, f),
                                           PCI_BASE_ADDRESS_0);
-                    pci_conf_write32(0, b, d, f,
+                    pci_conf_write32(PCI_SBDF(0, b, d, f),
                                      PCI_BASE_ADDRESS_0 + bar_idx*4, bar);
                     size = len & PCI_BASE_ADDRESS_IO_MASK;
 
diff --git a/xen/drivers/passthrough/amd/iommu_init.c 
b/xen/drivers/passthrough/amd/iommu_init.c
index f60238a5b8..d970f88a27 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -844,22 +844,22 @@ static void amd_iommu_erratum_746_workaround(struct 
amd_iommu *iommu)
          (boot_cpu_data.x86_model > 0x1f) )
         return;
 
-    pci_conf_write32(iommu->seg, bus, dev, func, 0xf0, 0x90);
+    pci_conf_write32(PCI_SBDF2(iommu->seg, iommu->bdf), 0xf0, 0x90);
     value = pci_conf_read32(PCI_SBDF2(iommu->seg, iommu->bdf), 0xf4);
 
     if ( value & (1 << 2) )
         return;
 
     /* Select NB indirect register 0x90 and enable writing */
-    pci_conf_write32(iommu->seg, bus, dev, func, 0xf0, 0x90 | (1 << 8));
+    pci_conf_write32(PCI_SBDF2(iommu->seg, iommu->bdf), 0xf0, 0x90 | (1 << 8));
 
-    pci_conf_write32(iommu->seg, bus, dev, func, 0xf4, value | (1 << 2));
+    pci_conf_write32(PCI_SBDF2(iommu->seg, iommu->bdf), 0xf4, value | (1 << 
2));
     printk(XENLOG_INFO
            "AMD-Vi: Applying erratum 746 workaround for IOMMU at 
%04x:%02x:%02x.%u\n",
            iommu->seg, bus, dev, func);
 
     /* Clear the enable writing bit */
-    pci_conf_write32(iommu->seg, bus, dev, func, 0xf0, 0x90);
+    pci_conf_write32(PCI_SBDF2(iommu->seg, iommu->bdf), 0xf0, 0x90);
 }
 
 static void enable_iommu(struct amd_iommu *iommu)
diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index ee2b9cc01c..7c196ba58b 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -638,7 +638,7 @@ unsigned int pci_size_mem_bar(pci_sbdf_t sbdf, unsigned int 
pos,
     ASSERT(!((flags & PCI_BAR_VF) && (flags & PCI_BAR_ROM)));
     ASSERT((flags & PCI_BAR_ROM) ||
            (bar & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY);
-    pci_conf_write32(sbdf.seg, sbdf.bus, sbdf.dev, sbdf.fn, pos, ~0);
+    pci_conf_write32(sbdf, pos, ~0);
     if ( is64bits )
     {
         if ( flags & PCI_BAR_LAST )
@@ -651,17 +651,17 @@ unsigned int pci_size_mem_bar(pci_sbdf_t sbdf, unsigned 
int pos,
             return 1;
         }
         hi = pci_conf_read32(sbdf, pos + 4);
-        pci_conf_write32(sbdf.seg, sbdf.bus, sbdf.dev, sbdf.fn, pos + 4, ~0);
+        pci_conf_write32(sbdf, pos + 4, ~0);
     }
     size = pci_conf_read32(sbdf, pos) & mask;
     if ( is64bits )
     {
         size |= (uint64_t)pci_conf_read32(sbdf, pos + 4) << 32;
-        pci_conf_write32(sbdf.seg, sbdf.bus, sbdf.dev, sbdf.fn, pos + 4, hi);
+        pci_conf_write32(sbdf, pos + 4, hi);
     }
     else if ( size )
         size |= (uint64_t)~0 << 32;
-    pci_conf_write32(sbdf.seg, sbdf.bus, sbdf.dev, sbdf.fn, pos, bar);
+    pci_conf_write32(sbdf, pos, bar);
     size = -size;
 
     if ( paddr )
diff --git a/xen/drivers/passthrough/vtd/quirks.c 
b/xen/drivers/passthrough/vtd/quirks.c
index 40bc25d544..d1512b9347 100644
--- a/xen/drivers/passthrough/vtd/quirks.c
+++ b/xen/drivers/passthrough/vtd/quirks.c
@@ -439,7 +439,7 @@ void pci_vtd_quirk(const struct pci_dev *pdev)
     case 0x3728: /* Xeon C5500/C3500 (JasperForest) */
     case 0x3c28: /* Sandybridge */
         val = pci_conf_read32(pdev->sbdf, 0x1AC);
-        pci_conf_write32(seg, bus, dev, func, 0x1AC, val | (1 << 31));
+        pci_conf_write32(pdev->sbdf, 0x1AC, val | (1 << 31));
         printk(XENLOG_INFO "Masked VT-d error signaling on 
%04x:%02x:%02x.%u\n",
                seg, bus, dev, func);
         break;
@@ -487,9 +487,9 @@ void pci_vtd_quirk(const struct pci_dev *pdev)
             action = "Found masked";
         else if ( !ff )
         {
-            pci_conf_write32(seg, bus, dev, func, pos + PCI_ERR_UNCOR_MASK,
+            pci_conf_write32(pdev->sbdf, pos + PCI_ERR_UNCOR_MASK,
                              val | PCI_ERR_UNC_UNSUP);
-            pci_conf_write32(seg, bus, dev, func, pos + PCI_ERR_COR_MASK,
+            pci_conf_write32(pdev->sbdf, pos + PCI_ERR_COR_MASK,
                              val2 | PCI_ERR_COR_ADV_NFAT);
             action = "Masked";
         }
@@ -498,7 +498,7 @@ void pci_vtd_quirk(const struct pci_dev *pdev)
 
         /* XPUNCERRMSK Send Completion with Unsupported Request */
         val = pci_conf_read32(pdev->sbdf, 0x20c);
-        pci_conf_write32(seg, bus, dev, func, 0x20c, val | (1 << 4));
+        pci_conf_write32(pdev->sbdf, 0x20c, val | (1 << 4));
 
         printk(XENLOG_INFO "%s UR signaling on %04x:%02x:%02x.%u\n",
                action, seg, bus, dev, func);
diff --git a/xen/drivers/vpci/header.c b/xen/drivers/vpci/header.c
index f377e6abdf..3c794f486d 100644
--- a/xen/drivers/vpci/header.c
+++ b/xen/drivers/vpci/header.c
@@ -85,7 +85,6 @@ static void modify_decoding(const struct pci_dev *pdev, 
uint16_t cmd,
                             bool rom_only)
 {
     struct vpci_header *header = &pdev->vpci->header;
-    uint8_t slot = PCI_SLOT(pdev->devfn), func = PCI_FUNC(pdev->devfn);
     bool map = cmd & PCI_COMMAND_MEMORY;
     unsigned int i;
 
@@ -113,7 +112,7 @@ static void modify_decoding(const struct pci_dev *pdev, 
uint16_t cmd,
                            (map ? PCI_ROM_ADDRESS_ENABLE : 0);
 
             header->bars[i].enabled = header->rom_enabled = map;
-            pci_conf_write32(pdev->seg, pdev->bus, slot, func, rom_pos, val);
+            pci_conf_write32(pdev->sbdf, rom_pos, val);
             return;
         }
 
@@ -395,7 +394,7 @@ static void bar_write(const struct pci_dev *pdev, unsigned 
int reg,
         val |= bar->prefetchable ? PCI_BASE_ADDRESS_MEM_PREFETCH : 0;
     }
 
-    pci_conf_write32(pdev->seg, pdev->bus, slot, func, reg, val);
+    pci_conf_write32(pdev->sbdf, reg, val);
 }
 
 static void rom_write(const struct pci_dev *pdev, unsigned int reg,
@@ -426,7 +425,7 @@ static void rom_write(const struct pci_dev *pdev, unsigned 
int reg,
     {
         /* Just update the ROM BAR field. */
         header->rom_enabled = new_enabled;
-        pci_conf_write32(pdev->seg, pdev->bus, slot, func, reg, val);
+        pci_conf_write32(pdev->sbdf, reg, val);
     }
     /*
      * Pass PCI_COMMAND_MEMORY or 0 to signal a map/unmap request, note that
diff --git a/xen/drivers/vpci/vpci.c b/xen/drivers/vpci/vpci.c
index 6cef5e420a..758d9420e7 100644
--- a/xen/drivers/vpci/vpci.c
+++ b/xen/drivers/vpci/vpci.c
@@ -253,7 +253,7 @@ static void vpci_write_hw(pci_sbdf_t sbdf, unsigned int 
reg, unsigned int size,
     switch ( size )
     {
     case 4:
-        pci_conf_write32(sbdf.seg, sbdf.bus, sbdf.dev, sbdf.fn, reg, data);
+        pci_conf_write32(sbdf, reg, data);
         break;
 
     case 3:
diff --git a/xen/include/xen/pci.h b/xen/include/xen/pci.h
index bfdfca057b..8148f5b2e7 100644
--- a/xen/include/xen/pci.h
+++ b/xen/include/xen/pci.h
@@ -177,9 +177,7 @@ uint16_t pci_conf_read16(pci_sbdf_t sbdf, unsigned int reg);
 uint32_t pci_conf_read32(pci_sbdf_t sbdf, unsigned int reg);
 void pci_conf_write8(pci_sbdf_t sbdf, unsigned int reg, uint8_t data);
 void pci_conf_write16(pci_sbdf_t sbdf, unsigned int reg, uint16_t data);
-void pci_conf_write32(
-    unsigned int seg, unsigned int bus, unsigned int dev, unsigned int func,
-    unsigned int reg, uint32_t data);
+void pci_conf_write32(pci_sbdf_t sbdf, unsigned int reg, uint32_t data);
 uint32_t pci_conf_read(uint32_t cf8, uint8_t offset, uint8_t bytes);
 void pci_conf_write(uint32_t cf8, uint8_t offset, uint8_t bytes, uint32_t 
data);
 int pci_mmcfg_read(unsigned int seg, unsigned int bus,
-- 
2.20.1 (Apple Git-117)


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