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From 65f90bfccf7500978879c15104a79de58173a06b Mon Sep 17 00:00:00 2001
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From: Matthew Rosato <mjrosato@linux.ibm.com>
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Date: Fri, 2 Sep 2022 13:27:36 -0400
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Subject: [PATCH 11/42] s390x/pci: reflect proper maxstbl for groups of
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interpreted devices
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Cédric Le Goater <clg@redhat.com>
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RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
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RH-Bugzilla: 1664378 2043909
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Commit: [11/41] 9ac2f5dedef3d743ef621525eef222a3e09d63b3
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The maximum supported store block length might be different depending
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on whether the instruction is interpretively executed (firmware-reported
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maximum) or handled via userspace intercept (host kernel API maximum).
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Choose the best available value during group creation.
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Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
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Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
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Message-Id: <20220902172737.170349-8-mjrosato@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 9ee8f7e46a7d42ede69a4780200129bf1acb0d01)
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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---
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hw/s390x/s390-pci-vfio.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
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index 338f436e87..2aefa508a0 100644
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--- a/hw/s390x/s390-pci-vfio.c
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+++ b/hw/s390x/s390-pci-vfio.c
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@@ -213,7 +213,11 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
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resgrp->msia = cap->msi_addr;
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resgrp->mui = cap->mui;
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resgrp->i = cap->noi;
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- resgrp->maxstbl = cap->maxstbl;
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+ if (pbdev->interp && hdr->version >= 2) {
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+ resgrp->maxstbl = cap->imaxstbl;
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+ } else {
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+ resgrp->maxstbl = cap->maxstbl;
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+ }
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resgrp->version = cap->version;
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resgrp->dtsm = ZPCI_DTSM;
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}
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--
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2.37.3
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