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89 lines
3.3 KiB
89 lines
3.3 KiB
1 year ago
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From 3c7bc4319d4e475c820a63176d18afb7b4b2ed78 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
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Date: Tue, 23 May 2023 12:34:33 +0200
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Subject: [PATCH 02/22] s390: kvm: adjust diag318 resets to retain data
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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: 279: Backport latest s390x-related fixes from upstream QEMU for qemu-kvm in RHEL 8.9
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RH-Bugzilla: 2169308 2209605
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Commit: [1/21] 16f2ff166efdd26a3be98d7c97d3b184598d1ca4
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Bugzilla: https://bugzilla.redhat.com/2169308
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commit c35aff184b2ed5be930da671ea25c857713555af
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Author: Collin L. Walling <walling@linux.ibm.com>
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Date: Wed Nov 17 10:23:03 2021 -0500
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s390: kvm: adjust diag318 resets to retain data
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The CPNC portion of the diag318 data is erroneously reset during an
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initial CPU reset caused by SIGP. Let's go ahead and relocate the
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diag318_info field within the CPUS390XState struct such that it is
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only zeroed during a clear reset. This way, the CPNC will be retained
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for each VCPU in the configuration after the diag318 instruction
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has been invoked.
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The s390_machine_reset code already takes care of zeroing the diag318
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data on VM resets, which also cover resets caused by diag308.
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Fixes: fabdada9357b ("s390: guest support for diagnose 0x318")
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Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Signed-off-by: Collin Walling <walling@linux.ibm.com>
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Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
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Message-Id: <20211117152303.627969-1-walling@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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---
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target/s390x/cpu.h | 4 ++--
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target/s390x/kvm/kvm.c | 4 ++++
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2 files changed, 6 insertions(+), 2 deletions(-)
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diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
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index ca3845d023..a75e559134 100644
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--- a/target/s390x/cpu.h
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+++ b/target/s390x/cpu.h
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@@ -63,6 +63,8 @@ struct CPUS390XState {
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uint64_t etoken; /* etoken */
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uint64_t etoken_extension; /* etoken extension */
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+ uint64_t diag318_info;
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+
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/* Fields up to this point are not cleared by initial CPU reset */
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struct {} start_initial_reset_fields;
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@@ -118,8 +120,6 @@ struct CPUS390XState {
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uint16_t external_call_addr;
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DECLARE_BITMAP(emergency_signals, S390_MAX_CPUS);
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- uint64_t diag318_info;
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-
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#if !defined(CONFIG_USER_ONLY)
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uint64_t tlb_fill_tec; /* translation exception code during tlb_fill */
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int tlb_fill_exc; /* exception number seen during tlb_fill */
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diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
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index d36b44f32a..8d36c377b5 100644
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--- a/target/s390x/kvm/kvm.c
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+++ b/target/s390x/kvm/kvm.c
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@@ -1598,6 +1598,10 @@ void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info)
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env->diag318_info = diag318_info;
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cs->kvm_run->s.regs.diag318 = diag318_info;
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_DIAG318;
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+ /*
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+ * diag 318 info is zeroed during a clear reset and
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+ * diag 308 IPL subcodes.
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+ */
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}
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}
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--
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2.37.3
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