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s390/pci: check for relaxed translation capability

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For each zdev, record whether or not CLP indicates relaxed translation
capability for the associated device group.

Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20250212213418.182902-2-mjrosato@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Matthew Rosato 2025-02-12 16:34:15 -05:00 • committed by Joerg Roedel
parent 0ad2507d5d
commit 6d52cb738a
3 changed files with 5 additions and 2 deletions
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2
arch/s390/include/asm/pci.h
View file

@ -144,7 +144,7 @@ struct zpci_dev {
u8 util_str_avail : 1;
u8 irqs_registered : 1;
u8 tid_avail : 1;
u8 reserved : 1;
u8 rtr_avail : 1; /* Relaxed translation allowed */
unsigned int devfn; /* DEVFN part of the RID*/
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */

4
arch/s390/include/asm/pci_clp.h
View file

@ -156,7 +156,9 @@ struct clp_rsp_query_pci_grp {
u16 : 4;
u16 noi : 12; /* number of interrupts */
u8 version;
u8 : 6;
u8 : 2;
u8 rtr : 1; /* Relaxed translation requirement */
u8 : 3;
u8 frame : 1;
u8 refresh : 1; /* TLB refresh mode */
u16 : 3;

1
arch/s390/pci/pci_clp.c
View file

@ -112,6 +112,7 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
zdev->version = response->version;
zdev->maxstbl = response->maxstbl;
zdev->dtsm = response->dtsm;
zdev->rtr_avail = response->rtr;
switch (response->version) {
case 1: