Re: [PATCH 10/32] s390/pci: stash dtsm and maxstbl

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On 12/7/21 21:57, Matthew Rosato wrote:
Store information about what IOAT designation types are supported by
underlying hardware as well as the largest store block size allowed.
These values will be needed by passthrough.

Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
---
  arch/s390/include/asm/pci.h     | 2 ++
  arch/s390/include/asm/pci_clp.h | 6 ++++--
  arch/s390/pci/pci_clp.c         | 2 ++
  3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 2474b8d30f2a..1a8f9f42da3a 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -126,9 +126,11 @@ struct zpci_dev {
  	u32		gd;		/* GISA designation for passthrough */
  	u16		vfn;		/* virtual function number */
  	u16		pchid;		/* physical channel ID */
+	u16		maxstbl;	/* Maximum store block size */
  	u8		pfgid;		/* function group ID */
  	u8		pft;		/* pci function type */
  	u8		port;
+	u8		dtsm;		/* Supported DT mask */
  	u8		rid_available	: 1;
  	u8		has_hp_slot	: 1;
  	u8		has_resources	: 1;
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h
index 3af8d196da74..124fadfb74b9 100644
--- a/arch/s390/include/asm/pci_clp.h
+++ b/arch/s390/include/asm/pci_clp.h
@@ -153,9 +153,11 @@ struct clp_rsp_query_pci_grp {
  	u8			:  6;
  	u8 frame		:  1;
  	u8 refresh		:  1;	/* TLB refresh mode */
-	u16 reserved2;
+	u16			:  3;
+	u16 maxstbl		: 13;	/* Maximum store block size */
  	u16 mui;
-	u16			: 16;
+	u8 dtsm;			/* Supported DT mask */
+	u8 reserved3;
  	u16 maxfaal;
  	u16			:  4;
  	u16 dnoi		: 12;
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index e9ed0e4a5cf0..bc7446566cbc 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -103,6 +103,8 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
  	zdev->max_msi = response->noi;
  	zdev->fmb_update = response->mui;
  	zdev->version = response->version;
+	zdev->maxstbl = response->maxstbl;
+	zdev->dtsm = response->dtsm;
switch (response->version) {
  	case 1:


Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>


--
Pierre Morel
IBM Lab Boeblingen



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