| Message ID | 20200311132151.172389-6-frankja@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | s390x: Protected Virtualization support | expand |
On Wed, 11 Mar 2020 09:21:41 -0400 Janosch Frank <frankja@linux.ibm.com> wrote: > Protected VMs no longer intercept with code 4 for an instruction > interception. Instead they have codes 104 and 108 for protected > instruction interception and protected instruction notification > respectively. > > The 104 mirrors the 4 interception. > > The 108 is a notification interception to let KVM and QEMU know that > something changed and we need to update tracking information or > perform specific tasks. It's currently taken for the following > instructions: > > * spx (To inform about the changed prefix location) > * sclp (On incorrect SCCB values, so we can inject a IRQ) > * sigp (All but "stop and store status") > * diag308 (Subcodes 0/1) > > Of these exits only sclp errors, state changing sigps and diag308 will > reach QEMU. QEMU will do its parts of the job, while the ultravisor > has done the instruction part of the job. > > Signed-off-by: Janosch Frank <frankja@linux.ibm.com> > Reviewed-by: David Hildenbrand <david@redhat.com> > Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> > --- > target/s390x/kvm.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c > index 1d6fd6a27b48e35f..eec0b92479465b9c 100644 > --- a/target/s390x/kvm.c > +++ b/target/s390x/kvm.c > @@ -115,6 +115,8 @@ > #define ICPT_CPU_STOP 0x28 > #define ICPT_OPEREXC 0x2c > #define ICPT_IO 0x40 > +#define ICPT_PV_INSTR 0x68 > +#define ICPT_PV_INSTR_NOTIFICATION 0x6c > > #define NR_LOCAL_IRQS 32 > /* > @@ -1693,6 +1695,8 @@ static int handle_intercept(S390CPU *cpu) > (long)cs->kvm_run->psw_addr); > switch (icpt_code) { > case ICPT_INSTRUCTION: > + case ICPT_PV_INSTR: > + case ICPT_PV_INSTR_NOTIFICATION: > r = handle_instruction(cpu, run); > break; > case ICPT_PROGRAM: very straightforward Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
On Wed, 11 Mar 2020 09:21:41 -0400 Janosch Frank <frankja@linux.ibm.com> wrote: > Protected VMs no longer intercept with code 4 for an instruction > interception. Instead they have codes 104 and 108 for protected > instruction interception and protected instruction notification > respectively. > > The 104 mirrors the 4 interception. > > The 108 is a notification interception to let KVM and QEMU know that > something changed and we need to update tracking information or > perform specific tasks. It's currently taken for the following > instructions: > > * spx (To inform about the changed prefix location) > * sclp (On incorrect SCCB values, so we can inject a IRQ) > * sigp (All but "stop and store status") > * diag308 (Subcodes 0/1) > > Of these exits only sclp errors, state changing sigps and diag308 will > reach QEMU. QEMU will do its parts of the job, while the ultravisor > has done the instruction part of the job. > > Signed-off-by: Janosch Frank <frankja@linux.ibm.com> > Reviewed-by: David Hildenbrand <david@redhat.com> > Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> > --- > target/s390x/kvm.c | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Cornelia Huck <cohuck@redhat.com>
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index 1d6fd6a27b48e35f..eec0b92479465b9c 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -115,6 +115,8 @@ #define ICPT_CPU_STOP 0x28 #define ICPT_OPEREXC 0x2c #define ICPT_IO 0x40 +#define ICPT_PV_INSTR 0x68 +#define ICPT_PV_INSTR_NOTIFICATION 0x6c #define NR_LOCAL_IRQS 32 /* @@ -1693,6 +1695,8 @@ static int handle_intercept(S390CPU *cpu) (long)cs->kvm_run->psw_addr); switch (icpt_code) { case ICPT_INSTRUCTION: + case ICPT_PV_INSTR: + case ICPT_PV_INSTR_NOTIFICATION: r = handle_instruction(cpu, run); break; case ICPT_PROGRAM: