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From 10ed4f6ad687d98f0bfe06d75775e8c541da80a0 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Fri, 29 May 2020 05:54:07 -0400
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Subject: [PATCH 25/42] s390x: protvirt: KVM intercept changes
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200529055420.16855-26-thuth@redhat.com>
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Patchwork-id: 97035
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 25/38] s390x: protvirt: KVM intercept changes
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Bugzilla: 1828317
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RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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From: Janosch Frank <frankja@linux.ibm.com>
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Protected VMs no longer intercept with code 4 for an instruction
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interception. Instead they have codes 104 and 108 for protected
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instruction interception and protected instruction notification
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respectively.
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The 104 mirrors the 4 interception.
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The 108 is a notification interception to let KVM and QEMU know that
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something changed and we need to update tracking information or
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perform specific tasks. It's currently taken for the following
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instructions:
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* spx (To inform about the changed prefix location)
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* sclp (On incorrect SCCB values, so we can inject a IRQ)
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* sigp (All but "stop and store status")
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* diag308 (Subcodes 0/1)
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Of these exits only sclp errors, state changing sigps and diag308 will
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reach QEMU. QEMU will do its parts of the job, while the ultravisor
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has done the instruction part of the job.
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: David Hildenbrand <david@redhat.com>
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Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
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Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
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Reviewed-by: Cornelia Huck <cohuck@redhat.com>
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Message-Id: <20200319131921.2367-7-frankja@linux.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit 2585e507ffa1da01b57dbea26b1e1fe507d27198)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/s390x/kvm.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
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index 9a0be13959..af50b2c253 100644
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--- a/target/s390x/kvm.c
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+++ b/target/s390x/kvm.c
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@@ -115,6 +115,8 @@
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#define ICPT_CPU_STOP 0x28
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#define ICPT_OPEREXC 0x2c
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#define ICPT_IO 0x40
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+#define ICPT_PV_INSTR 0x68
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+#define ICPT_PV_INSTR_NOTIFICATION 0x6c
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#define NR_LOCAL_IRQS 32
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/*
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@@ -1695,6 +1697,8 @@ static int handle_intercept(S390CPU *cpu)
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(long)cs->kvm_run->psw_addr);
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switch (icpt_code) {
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case ICPT_INSTRUCTION:
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+ case ICPT_PV_INSTR:
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+ case ICPT_PV_INSTR_NOTIFICATION:
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r = handle_instruction(cpu, run);
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break;
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case ICPT_PROGRAM:
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--
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2.27.0
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