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From 8345b90f43b14435938fbbe0f3a510a60f5d0ded 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 05:54:14 -0400
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Subject: [PATCH 32/42] s390x: protvirt: Move IO control structures over SIDA
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20200529055420.16855-33-thuth@redhat.com>
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Patchwork-id: 97040
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O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 32/38] s390x: protvirt: Move IO control structures over SIDA
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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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For protected guests, we need to put the IO emulation results into the
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SIDA, so SIE will write them into the guest at the next entry.
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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: Cornelia Huck <cohuck@redhat.com>
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Message-Id: <20200319131921.2367-14-frankja@linux.ibm.com>
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Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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(cherry picked from commit fcc10c1470d6e9460ebcf4c30f5bbd37b921a041)
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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/ioinst.c | 61 +++++++++++++++++++++++++++++++------------
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1 file changed, 45 insertions(+), 16 deletions(-)
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diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c
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index bbcccf6be2..f40c35c6ff 100644
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--- a/target/s390x/ioinst.c
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+++ b/target/s390x/ioinst.c
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@@ -138,7 +138,9 @@ void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra)
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s390_program_interrupt(env, PGM_SPECIFICATION, ra);
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return;
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}
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- if (s390_cpu_virt_mem_read(cpu, addr, ar, &schib, sizeof(schib))) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_read(cpu, addr, &schib, sizeof(schib));
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+ } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &schib, sizeof(schib))) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return;
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}
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@@ -195,7 +197,9 @@ void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra)
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s390_program_interrupt(env, PGM_SPECIFICATION, ra);
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return;
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}
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- if (s390_cpu_virt_mem_read(cpu, addr, ar, &orig_orb, sizeof(orb))) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_read(cpu, addr, &orig_orb, sizeof(orb));
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+ } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &orig_orb, sizeof(orb))) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return;
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}
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@@ -231,14 +235,19 @@ void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb, uintptr_t ra)
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cc = css_do_stcrw(&crw;;
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/* 0 - crw stored, 1 - zeroes stored */
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- if (s390_cpu_virt_mem_write(cpu, addr, ar, &crw, sizeof(crw)) == 0) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_write(cpu, addr, &crw, sizeof(crw));
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setcc(cpu, cc);
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} else {
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- if (cc == 0) {
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- /* Write failed: requeue CRW since STCRW is suppressing */
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- css_undo_stcrw(&crw;;
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+ if (s390_cpu_virt_mem_write(cpu, addr, ar, &crw, sizeof(crw)) == 0) {
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+ setcc(cpu, cc);
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+ } else {
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+ if (cc == 0) {
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+ /* Write failed: requeue CRW since STCRW is suppressing */
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+ css_undo_stcrw(&crw;;
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+ }
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+ s390_cpu_virt_mem_handle_exc(cpu, ra);
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}
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- s390_cpu_virt_mem_handle_exc(cpu, ra);
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}
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}
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@@ -260,6 +269,13 @@ void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb,
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}
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if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
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+ /*
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+ * The Ultravisor checks schid bit 16 to be one and bits 0-12
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+ * to be 0 and injects a operand exception itself.
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+ *
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+ * Hence we should never end up here.
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+ */
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+ g_assert(!s390_is_pv());
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/*
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* As operand exceptions have a lower priority than access exceptions,
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* we check whether the memory area is writeable (injecting the
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@@ -292,14 +308,17 @@ void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb,
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}
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}
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if (cc != 3) {
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- if (s390_cpu_virt_mem_write(cpu, addr, ar, &schib,
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- sizeof(schib)) != 0) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_write(cpu, addr, &schib, sizeof(schib));
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+ } else if (s390_cpu_virt_mem_write(cpu, addr, ar, &schib,
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+ sizeof(schib)) != 0) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return;
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}
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} else {
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/* Access exceptions have a higher priority than cc3 */
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- if (s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib)) != 0) {
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+ if (!s390_is_pv() &&
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+ s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib)) != 0) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return;
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}
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@@ -336,7 +355,9 @@ int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra)
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}
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/* 0 - status pending, 1 - not status pending, 3 - not operational */
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if (cc != 3) {
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- if (s390_cpu_virt_mem_write(cpu, addr, ar, &irb, irb_len) != 0) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_write(cpu, addr, &irb, irb_len);
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+ } else if (s390_cpu_virt_mem_write(cpu, addr, ar, &irb, irb_len) != 0) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return -EFAULT;
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}
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@@ -344,7 +365,8 @@ int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra)
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} else {
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irb_len = sizeof(irb) - sizeof(irb.emw);
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/* Access exceptions have a higher priority than cc3 */
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- if (s390_cpu_virt_mem_check_write(cpu, addr, ar, irb_len) != 0) {
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+ if (!s390_is_pv() &&
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+ s390_cpu_virt_mem_check_write(cpu, addr, ar, irb_len) != 0) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return -EFAULT;
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}
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@@ -642,7 +664,9 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra)
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* present CHSC sub-handlers ... if we ever need more, we should take
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* care of req->len here first.
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*/
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- if (s390_cpu_virt_mem_read(cpu, addr, reg, buf, sizeof(ChscReq))) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_read(cpu, addr, buf, sizeof(ChscReq));
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+ } else if (s390_cpu_virt_mem_read(cpu, addr, reg, buf, sizeof(ChscReq))) {
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s390_cpu_virt_mem_handle_exc(cpu, ra);
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return;
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}
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@@ -675,11 +699,16 @@ void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra)
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break;
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}
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- if (!s390_cpu_virt_mem_write(cpu, addr + len, reg, res,
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- be16_to_cpu(res->len))) {
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+ if (s390_is_pv()) {
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+ s390_cpu_pv_mem_write(cpu, addr + len, res, be16_to_cpu(res->len));
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setcc(cpu, 0); /* Command execution complete */
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} else {
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- s390_cpu_virt_mem_handle_exc(cpu, ra);
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+ if (!s390_cpu_virt_mem_write(cpu, addr + len, reg, res,
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+ be16_to_cpu(res->len))) {
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+ setcc(cpu, 0); /* Command execution complete */
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+ } else {
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+ s390_cpu_virt_mem_handle_exc(cpu, ra);
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+ }
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}
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}
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--
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2.27.0
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