From: Christian Borntraeger <borntraeger@de.ibm.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: KVM <kvm@vger.kernel.org>, Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
David Hildenbrand <david@redhat.com>,
linux-s390 <linux-s390@vger.kernel.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>
Subject: [GIT PULL 17/17] KVM: s390: add debug statement for diag 318 CPNC data
Date: Sun, 31 Oct 2021 13:11:04 +0100 [thread overview]
Message-ID: <20211031121104.14764-18-borntraeger@de.ibm.com> (raw)
In-Reply-To: <20211031121104.14764-1-borntraeger@de.ibm.com>
From: Collin Walling <walling@linux.ibm.com>
The diag 318 data contains values that denote information regarding the
guest's environment. Currently, it is unecessarily difficult to observe
this value (either manually-inserted debug statements, gdb stepping, mem
dumping etc). It's useful to observe this information to obtain an
at-a-glance view of the guest's environment, so lets add a simple VCPU
event that prints the CPNC to the s390dbf logs.
Signed-off-by: Collin Walling <walling@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Link: https://lore.kernel.org/r/20211027025451.290124-1-walling@linux.ibm.com
[borntraeger@de.ibm.com]: change debug level to 3
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
arch/s390/kvm/kvm-s390.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 6482ea9139bb..c6257f625929 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -4255,6 +4255,7 @@ static void sync_regs_fmt2(struct kvm_vcpu *vcpu)
if (kvm_run->kvm_dirty_regs & KVM_SYNC_DIAG318) {
vcpu->arch.diag318_info.val = kvm_run->s.regs.diag318;
vcpu->arch.sie_block->cpnc = vcpu->arch.diag318_info.cpnc;
+ VCPU_EVENT(vcpu, 3, "setting cpnc to %d", vcpu->arch.diag318_info.cpnc);
}
/*
* If userspace sets the riccb (e.g. after migration) to a valid state,
--
2.31.1
next prev parent reply other threads:[~2021-10-31 12:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-31 12:10 [GIT PULL 00/17] KVM: s390: Fixes and Features for 5.16 Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 01/17] s390/gmap: validate VMA in __gmap_zap() Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 02/17] s390/gmap: don't unconditionally call pte_unmap_unlock() " Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 03/17] s390/mm: validate VMA in PGSTE manipulation functions Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 04/17] s390/mm: fix VMA and page table handling code in storage key handling functions Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 05/17] s390/uv: fully validate the VMA before calling follow_page() Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 06/17] s390/mm: no need for pte_alloc_map_lock() if we know the pmd is present Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 07/17] s390/mm: optimize set_guest_storage_key() Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 08/17] s390/mm: optimize reset_guest_reference_bit() Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 09/17] KVM: s390: pv: add macros for UVC CC values Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 10/17] KVM: s390: pv: avoid double free of sida page Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 11/17] KVM: s390: pv: avoid stalls for kvm_s390_pv_init_vm Christian Borntraeger
2021-10-31 12:10 ` [GIT PULL 12/17] KVM: s390: pv: avoid stalls when making pages secure Christian Borntraeger
2021-10-31 12:11 ` [GIT PULL 13/17] KVM: s390: Simplify SIGP Set Arch handling Christian Borntraeger
2021-10-31 12:11 ` [GIT PULL 14/17] KVM: s390: Add a routine for setting userspace CPU state Christian Borntraeger
2021-10-31 12:11 ` [GIT PULL 15/17] KVM: s390: Fix handle_sske page fault handling Christian Borntraeger
2021-10-31 12:11 ` [GIT PULL 16/17] KVM: s390: pv: properly handle page flags for protected guests Christian Borntraeger
2021-10-31 12:11 ` Christian Borntraeger [this message]
2021-11-01 7:35 ` [GIT PULL 00/17] KVM: s390: Fixes and Features for 5.16 Paolo Bonzini
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