linux-kernel - [PATCH v3 09/30] s390/pci: export some routines related to RPCIT processing

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Date:   Fri,  4 Feb 2022 16:15:15 -0500
From:   Matthew Rosato <mjrosato@...ux.ibm.com>
To:     linux-s390@...r.kernel.org
Cc:     alex.williamson@...hat.com, cohuck@...hat.com,
        schnelle@...ux.ibm.com, farman@...ux.ibm.com, pmorel@...ux.ibm.com,
        borntraeger@...ux.ibm.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, agordeev@...ux.ibm.com,
        frankja@...ux.ibm.com, david@...hat.com, imbrenda@...ux.ibm.com,
        vneethv@...ux.ibm.com, oberpar@...ux.ibm.com, freude@...ux.ibm.com,
        thuth@...hat.com, pasic@...ux.ibm.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>
Subject: [PATCH v3 09/30] s390/pci: export some routines related to RPCIT processing

KVM will re-use dma_walk_cpu_trans to walk the host shadow table and
will also need to be able to call zpci_refresh_trans to re-issue a RPCIT.

Reviewed-by: Niklas Schnelle <schnelle@...ux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@...ux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@...ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@...ux.ibm.com>
---
 arch/s390/pci/pci_dma.c  | 1 +
 arch/s390/pci/pci_insn.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index f46833a25526..a81de48d5ea7 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -116,6 +116,7 @@ unsigned long *dma_walk_cpu_trans(unsigned long *rto, dma_addr_t dma_addr)
 	px = calc_px(dma_addr);
 	return &pto[px];
 }
+EXPORT_SYMBOL_GPL(dma_walk_cpu_trans);
 
 void dma_update_cpu_trans(unsigned long *entry, phys_addr_t page_addr, int flags)
 {
diff --git a/arch/s390/pci/pci_insn.c b/arch/s390/pci/pci_insn.c
index 2a47b3936e44..0509554301c7 100644
--- a/arch/s390/pci/pci_insn.c
+++ b/arch/s390/pci/pci_insn.c
@@ -95,6 +95,7 @@ int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
 
 	return (cc) ? -EIO : 0;
 }
+EXPORT_SYMBOL_GPL(zpci_refresh_trans);
 
 /* Set Interruption Controls */
 int zpci_set_irq_ctrl(u16 ctl, u8 isc, union zpci_sic_iib *iib)
-- 
2.27.0