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[PULL 10/14] s390x/pci: enable adapter event notification for interprete
From: |
Thomas Huth |
Subject: |
[PULL 10/14] s390x/pci: enable adapter event notification for interpreted devices |
Date: |
Mon, 26 Sep 2022 19:08:00 +0200 |
From: Matthew Rosato <mjrosato@linux.ibm.com>
Use the associated kvm ioctl operation to enable adapter event notification
and forwarding for devices when requested. This feature will be set up
with or without firmware assist based upon the 'forwarding_assist' setting.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20220902172737.170349-6-mjrosato@linux.ibm.com>
[thuth: Rename "forwarding_assist" property to "forwarding-assist"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
include/hw/s390x/s390-pci-bus.h | 1 +
include/hw/s390x/s390-pci-kvm.h | 14 ++++++++++++
hw/s390x/s390-pci-bus.c | 20 ++++++++++++++---
hw/s390x/s390-pci-inst.c | 40 +++++++++++++++++++++++++++++++--
hw/s390x/s390-pci-kvm.c | 30 +++++++++++++++++++++++++
5 files changed, 100 insertions(+), 5 deletions(-)
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index a9843dfe97..5b09f0cf2f 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -351,6 +351,7 @@ struct S390PCIBusDevice {
bool pci_unplug_request_processed;
bool unplug_requested;
bool interp;
+ bool forwarding_assist;
QTAILQ_ENTRY(S390PCIBusDevice) link;
};
diff --git a/include/hw/s390x/s390-pci-kvm.h b/include/hw/s390x/s390-pci-kvm.h
index 80a2e7d0ca..933814a402 100644
--- a/include/hw/s390x/s390-pci-kvm.h
+++ b/include/hw/s390x/s390-pci-kvm.h
@@ -12,13 +12,27 @@
#ifndef HW_S390_PCI_KVM_H
#define HW_S390_PCI_KVM_H
+#include "hw/s390x/s390-pci-bus.h"
+#include "hw/s390x/s390-pci-inst.h"
+
#ifdef CONFIG_KVM
bool s390_pci_kvm_interp_allowed(void);
+int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool
assist);
+int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev);
#else
static inline bool s390_pci_kvm_interp_allowed(void)
{
return false;
}
+static inline int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib
*fib,
+ bool assist)
+{
+ return -EINVAL;
+}
+static inline int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
+{
+ return -EINVAL;
+}
#endif
#endif
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 816d17af99..2f19973913 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -190,7 +190,10 @@ void s390_pci_sclp_deconfigure(SCCB *sccb)
rc = SCLP_RC_NO_ACTION_REQUIRED;
break;
default:
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1082,6 +1085,7 @@ static void s390_pcihost_plug(HotplugHandler
*hotplug_dev, DeviceState *dev,
} else {
DPRINTF("zPCI interpretation facilities missing.\n");
pbdev->interp = false;
+ pbdev->forwarding_assist = false;
}
}
pbdev->iommu->dma_limit = s390_pci_start_dma_count(s, pbdev);
@@ -1090,11 +1094,13 @@ static void s390_pcihost_plug(HotplugHandler
*hotplug_dev, DeviceState *dev,
if (!pbdev->interp) {
/* Do vfio passthrough but intercept for I/O */
pbdev->fh |= FH_SHM_VFIO;
+ pbdev->forwarding_assist = false;
}
} else {
pbdev->fh |= FH_SHM_EMUL;
/* Always intercept emulated devices */
pbdev->interp = false;
+ pbdev->forwarding_assist = false;
}
if (s390_pci_msix_init(pbdev) && !pbdev->interp) {
@@ -1244,7 +1250,10 @@ static void s390_pcihost_reset(DeviceState *dev)
/* Process all pending unplug requests */
QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) {
if (pbdev->unplug_requested) {
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1382,7 +1391,10 @@ static void s390_pci_device_reset(DeviceState *dev)
break;
}
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1428,6 +1440,8 @@ static Property s390_pci_device_properties[] = {
DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
DEFINE_PROP_BOOL("interpret", S390PCIBusDevice, interp, true),
+ DEFINE_PROP_BOOL("forwarding-assist", S390PCIBusDevice, forwarding_assist,
+ true),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 651ec38635..20a9bcc7af 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -1066,6 +1066,32 @@ static void fmb_update(void *opaque)
timer_mod(pbdev->fmb_timer, t + pbdev->pci_group->zpci_group.mui);
}
+static int mpcifc_reg_int_interp(S390PCIBusDevice *pbdev, ZpciFib *fib)
+{
+ int rc;
+
+ rc = s390_pci_kvm_aif_enable(pbdev, fib, pbdev->forwarding_assist);
+ if (rc) {
+ DPRINTF("Failed to enable interrupt forwarding\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static int mpcifc_dereg_int_interp(S390PCIBusDevice *pbdev, ZpciFib *fib)
+{
+ int rc;
+
+ rc = s390_pci_kvm_aif_disable(pbdev);
+ if (rc) {
+ DPRINTF("Failed to disable interrupt forwarding\n");
+ return rc;
+ }
+
+ return 0;
+}
+
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
uintptr_t ra)
{
@@ -1120,7 +1146,12 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1,
uint64_t fiba, uint8_t ar,
switch (oc) {
case ZPCI_MOD_FC_REG_INT:
- if (pbdev->summary_ind) {
+ if (pbdev->interp) {
+ if (mpcifc_reg_int_interp(pbdev, &fib)) {
+ cc = ZPCI_PCI_LS_ERR;
+ s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
+ }
+ } else if (pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else if (reg_irqs(env, pbdev, fib)) {
@@ -1129,7 +1160,12 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1,
uint64_t fiba, uint8_t ar,
}
break;
case ZPCI_MOD_FC_DEREG_INT:
- if (!pbdev->summary_ind) {
+ if (pbdev->interp) {
+ if (mpcifc_dereg_int_interp(pbdev, &fib)) {
+ cc = ZPCI_PCI_LS_ERR;
+ s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
+ }
+ } else if (!pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c
index 0f16104a74..9134fe185f 100644
--- a/hw/s390x/s390-pci-kvm.c
+++ b/hw/s390x/s390-pci-kvm.c
@@ -11,12 +11,42 @@
#include "qemu/osdep.h"
+#include <linux/kvm.h>
+
#include "kvm/kvm_s390x.h"
#include "hw/s390x/pv.h"
+#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/s390-pci-kvm.h"
+#include "hw/s390x/s390-pci-inst.h"
#include "cpu_models.h"
bool s390_pci_kvm_interp_allowed(void)
{
return kvm_s390_get_zpci_op() && !s390_is_pv();
}
+
+int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
+{
+ struct kvm_s390_zpci_op args = {
+ .fh = pbdev->fh,
+ .op = KVM_S390_ZPCIOP_REG_AEN,
+ .u.reg_aen.ibv = fib->aibv,
+ .u.reg_aen.sb = fib->aisb,
+ .u.reg_aen.noi = FIB_DATA_NOI(fib->data),
+ .u.reg_aen.isc = FIB_DATA_ISC(fib->data),
+ .u.reg_aen.sbo = FIB_DATA_AISBO(fib->data),
+ .u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST
+ };
+
+ return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+}
+
+int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
+{
+ struct kvm_s390_zpci_op args = {
+ .fh = pbdev->fh,
+ .op = KVM_S390_ZPCIOP_DEREG_AEN
+ };
+
+ return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+}
--
2.31.1
- [PULL 00/14] s390x patches and slirp submodule removal, Thomas Huth, 2022/09/26
- [PULL 01/14] s390x/tcg: Fix opcode for lzrf, Thomas Huth, 2022/09/26
- [PULL 05/14] configure: Add -Wno-gnu-variable-sized-type-not-at-end, Thomas Huth, 2022/09/26
- [PULL 02/14] linux-user/host/s390: Add vector instructions to host_signal_write(), Thomas Huth, 2022/09/26
- [PULL 03/14] target/s390x: support SHA-512 extensions, Thomas Huth, 2022/09/26
- [PULL 08/14] s390x/pci: enable for load/store interpretation, Thomas Huth, 2022/09/26
- [PULL 04/14] target/s390x: support PRNO_TRNG instruction, Thomas Huth, 2022/09/26
- [PULL 06/14] Update linux headers to v6.0-rc4, Thomas Huth, 2022/09/26
- [PULL 11/14] s390x/pci: let intercept devices have separate PCI groups, Thomas Huth, 2022/09/26
- [PULL 13/14] s390x/s390-virtio-ccw: add zpcii-disable machine property, Thomas Huth, 2022/09/26
- [PULL 10/14] s390x/pci: enable adapter event notification for interpreted devices,
Thomas Huth <=
- [PULL 14/14] Remove the slirp submodule (i.e. compile only with an external libslirp), Thomas Huth, 2022/09/26
- [PULL 07/14] s390x/pci: add routine to get host function handle from CLP info, Thomas Huth, 2022/09/26
- [PULL 12/14] s390x/pci: reflect proper maxstbl for groups of interpreted devices, Thomas Huth, 2022/09/26
- [PULL 09/14] s390x/pci: don't fence interpreted devices without MSI-X, Thomas Huth, 2022/09/26
- Re: [PULL 00/14] s390x patches and slirp submodule removal, Stefan Hajnoczi, 2022/09/27