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Re: [Qemu-devel] [PATCH v3] Add param Error ** for msi_init()
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From: |
Marcel Apfelbaum |
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Subject: |
Re: [Qemu-devel] [PATCH v3] Add param Error ** for msi_init() |
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Date: |
Tue, 29 Mar 2016 23:56:06 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 |
On 03/28/2016 01:44 PM, Cao jin wrote:
Add param Error **errp, and change pci_add_capability() to
pci_add_capability2(), because pci_add_capability() report error, and
msi_init() is widely used in realize(), so it is not suitable for realize().
Hi,
The patch is looking good in my opinion, a few comments below:
Also fix all the callers who should deal with the msi_init() failure but
actually not. The affected devices are as following:
1. intel hd audio: move msi_init() above, save the strength to free
the MemoryRegion when it fails.
2. usb-xhci: move msi_init() above, save the strength to free the
MemoryRegion when it fails.
3. ich9 ahci: it is a on-board device created during machine
initialization, when it fail, qemu will exit, so, no need to free
resource manually.
4. megasas_scsi: move msi_init() above, save the strength to free
the MemoryRegion when it fails . Also fix a bug: when user enable
msi, and msi_init success(return positive offset value), the code
disable msi in the flags. But it seems this bug doesn`t do anything
bad.
5. mptsas: when msi_init() fail, it will use INTx. So, catch the
error & report it right there, don`t propagate it. Move msi_init()
above, save the strength to free the MemoryRegion when it fails.
6. pci_bridge_dev/ioh3420/xio3130_downstream/xio3130_upstream: catch
error & report it right there.
7. vmxnet3: move msi_init() above, save the strength to free the
MemoryRegion when it fails. Remove the unecessary vmxnet3_init_msi().
When msi_init() fail, it will use INTx, so msi_init()`s failure should not
break the realize. Just catch & report msi_init()`s failure message.
8. pvscsi: when msi_init fail, it will use INTx. so msi_init failure
should not break the realize. Report the error when msi_init fail.
Nobody use the return value of pvscsi_init_msi(), so change its type
to void.
9. vfio-pci: it ignores the config space corruption error, so,
catch & report it right there.
I suggest to move 1-9 points to after --- so it will not be part of the commit
message, only reference for the reviewers.
Signed-off-by: Cao jin <address@hidden>
---
The patch has been compiled. No further test.
hw/audio/intel-hda.c | 11 +++++++---
hw/ide/ich.c | 2 +-
hw/net/vmxnet3.c | 41 ++++++++++++++------------------------
hw/pci-bridge/ioh3420.c | 6 +++++-
hw/pci-bridge/pci_bridge_dev.c | 8 +++++++-
hw/pci-bridge/xio3130_downstream.c | 7 ++++++-
hw/pci-bridge/xio3130_upstream.c | 7 ++++++-
hw/pci/msi.c | 23 +++++++++++++++++++--
hw/scsi/megasas.c | 12 +++++++----
hw/scsi/mptsas.c | 17 +++++++++++-----
hw/scsi/vmw_pvscsi.c | 10 ++++++----
hw/usb/hcd-xhci.c | 10 +++++++---
hw/vfio/pci.c | 6 ++++--
include/hw/pci/msi.h | 3 ++-
14 files changed, 108 insertions(+), 55 deletions(-)
diff --git a/hw/audio/intel-hda.c b/hw/audio/intel-hda.c
index d372d4a..c3856cc 100644
--- a/hw/audio/intel-hda.c
+++ b/hw/audio/intel-hda.c
@@ -1139,12 +1139,17 @@ static void intel_hda_realize(PCIDevice *pci, Error
**errp)
/* HDCTL off 0x40 bit 0 selects signaling mode (1-HDA, 0 - Ac97) 18.1.19
*/
conf[0x40] = 0x01;
+ if (d->msi) {
+ msi_init(&d->pci, d->old_msi_addr ? 0x50 : 0x60, 1,
+ true, false, errp);
+ if (*errp) {
+ return;
+ }
+ }
+
memory_region_init_io(&d->mmio, OBJECT(d), &intel_hda_mmio_ops, d,
"intel-hda", 0x4000);
pci_register_bar(&d->pci, 0, 0, &d->mmio);
- if (d->msi) {
- msi_init(&d->pci, d->old_msi_addr ? 0x50 : 0x60, 1, true, false);
- }
hda_codec_bus_init(DEVICE(pci), &d->codecs, sizeof(d->codecs),
intel_hda_response, intel_hda_xfer);
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index 0a13334..db4fdb5 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -146,7 +146,7 @@ static void pci_ich9_ahci_realize(PCIDevice *dev, Error
**errp)
/* Although the AHCI 1.3 specification states that the first capability
* should be PMCAP, the Intel ICH9 data sheet specifies that the ICH9
* AHCI device puts the MSI capability first, pointing to 0x80. */
- msi_init(dev, ICH9_MSI_CAP_OFFSET, 1, true, false);
+ msi_init(dev, ICH9_MSI_CAP_OFFSET, 1, true, false, errp);
}
static void pci_ich9_uninit(PCIDevice *dev)
diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c
index 093a71e..f3614f2 100644
--- a/hw/net/vmxnet3.c
+++ b/hw/net/vmxnet3.c
@@ -348,7 +348,7 @@ typedef struct {
/* Interrupt management */
/*
- *This function returns sign whether interrupt line is in asserted state
+ * This function returns sign whether interrupt line is in asserted state
* This depends on the type of interrupt used. For INTX interrupt line will
* be asserted until explicit deassertion, for MSI(X) interrupt line will
* be deasserted automatically due to notification semantics of the MSI(X)
@@ -2189,27 +2189,6 @@ vmxnet3_cleanup_msix(VMXNET3State *s)
}
}
-#define VMXNET3_USE_64BIT (true)
-#define VMXNET3_PER_VECTOR_MASK (false)
-
-static bool
-vmxnet3_init_msi(VMXNET3State *s)
-{
- PCIDevice *d = PCI_DEVICE(s);
- int res;
-
- res = msi_init(d, VMXNET3_MSI_OFFSET(s), VMXNET3_MAX_NMSIX_INTRS,
- VMXNET3_USE_64BIT, VMXNET3_PER_VECTOR_MASK);
- if (0 > res) {
- VMW_WRPRN("Failed to initialize MSI, error %d", res);
- s->msi_used = false;
- } else {
- s->msi_used = true;
- }
-
- return s->msi_used;
-}
-
static void
vmxnet3_cleanup_msi(VMXNET3State *s)
{
@@ -2271,6 +2250,10 @@ static uint8_t *vmxnet3_device_serial_num(VMXNET3State
*s)
return dsnp;
}
+
+#define VMXNET3_USE_64BIT (true)
+#define VMXNET3_PER_VECTOR_MASK (false)
+
static void vmxnet3_pci_realize(PCIDevice *pci_dev, Error **errp)
{
DeviceState *dev = DEVICE(pci_dev);
@@ -2278,6 +2261,16 @@ static void vmxnet3_pci_realize(PCIDevice *pci_dev,
Error **errp)
VMW_CBPRN("Starting init...");
+ msi_init(pci_dev, VMXNET3_MSI_OFFSET(s), VMXNET3_MAX_NMSIX_INTRS,
+ VMXNET3_USE_64BIT, VMXNET3_PER_VECTOR_MASK, errp);
+ if (*errp) {
+ error_report_err(*errp);
+ *errp = NULL;
You suppress prev debug message: VMW_WRPRN("Failed to initialize MSI, error
%d", res),
but you replace with one of yourself. If the vmxnet maintainers have nothing
against,
I suppose is OK.
Then, you don't propagate the error because you don't want realize
to fail, so you report it and NULL it. I suppose we should have
a "warning only" error type so the reporting party can decide to issue a warning
or to fail, but is out of the scope of this patch, of course.
> - s->msi_used = false;
+ s->msi_used = false;
+ } else {
+ s->msi_used = true;
+ }
+
memory_region_init_io(&s->bar0, OBJECT(s), &b0_ops, s,
"vmxnet3-b0", VMXNET3_PT_REG_SIZE);
pci_register_bar(pci_dev, VMXNET3_BAR0_IDX,
@@ -2302,10 +2295,6 @@ static void vmxnet3_pci_realize(PCIDevice *pci_dev,
Error **errp)
VMW_WRPRN("Failed to initialize MSI-X, configuration is
inconsistent.");
}
- if (!vmxnet3_init_msi(s)) {
- VMW_WRPRN("Failed to initialize MSI, configuration is inconsistent.");
Here again you remove an existent debug warning, maybe you should keep it.
- }
-
vmxnet3_net_init(s);
if (pci_is_express(pci_dev)) {
diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
index 0937fa3..159a10c 100644
--- a/hw/pci-bridge/ioh3420.c
+++ b/hw/pci-bridge/ioh3420.c
@@ -97,6 +97,7 @@ static int ioh3420_initfn(PCIDevice *d)
PCIEPort *p = PCIE_PORT(d);
PCIESlot *s = PCIE_SLOT(d);
int rc;
+ Error *err = NULL;
pci_bridge_initfn(d, TYPE_PCIE_BUS);
pcie_port_init_reg(d);
@@ -106,12 +107,15 @@ static int ioh3420_initfn(PCIDevice *d)
if (rc < 0) {
goto err_bridge;
}
+
rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
- IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
+ IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT, &err);
if (rc < 0) {
+ error_report_err(err);
goto err_bridge;
}
+
rc = pcie_cap_init(d, IOH_EP_EXP_OFFSET, PCI_EXP_TYPE_ROOT_PORT, p->port);
if (rc < 0) {
goto err_msi;
diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c
index 862a236..07c7bf8 100644
--- a/hw/pci-bridge/pci_bridge_dev.c
+++ b/hw/pci-bridge/pci_bridge_dev.c
@@ -52,6 +52,7 @@ static int pci_bridge_dev_initfn(PCIDevice *dev)
PCIBridge *br = PCI_BRIDGE(dev);
PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev);
int err;
+ Error *local_err = NULL;
You use both local_err and err for local error names. It doesn't really matter
the name, but please be consistent. I personally like local_error but is up to
you, of course.
pci_bridge_initfn(dev, TYPE_PCI_BUS);
@@ -67,17 +68,21 @@ static int pci_bridge_dev_initfn(PCIDevice *dev)
/* MSI is not applicable without SHPC */
bridge_dev->flags &= ~(1 << PCI_BRIDGE_DEV_F_MSI_REQ);
}
+
err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0);
if (err) {
goto slotid_error;
}
+
You have several new lines (before and after this comment) that have nothing
to do with the patch. I suggest putting them into a trivial separate patch.
if ((bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_MSI_REQ)) &&
msi_nonbroken) {
- err = msi_init(dev, 0, 1, true, true);
+ err = msi_init(dev, 0, 1, true, true, &local_err);
if (err < 0) {
+ error_report_err(local_err);
goto msi_error;
}
}
+
if (shpc_present(dev)) {
/* TODO: spec recommends using 64 bit prefetcheable BAR.
* Check whether that works well. */
@@ -85,6 +90,7 @@ static int pci_bridge_dev_initfn(PCIDevice *dev)
PCI_BASE_ADDRESS_MEM_TYPE_64, &bridge_dev->bar);
}
return 0;
+
msi_error:
slotid_cap_cleanup(dev);
slotid_error:
diff --git a/hw/pci-bridge/xio3130_downstream.c
b/hw/pci-bridge/xio3130_downstream.c
index cf1ee63..7428923 100644
--- a/hw/pci-bridge/xio3130_downstream.c
+++ b/hw/pci-bridge/xio3130_downstream.c
@@ -60,26 +60,31 @@ static int xio3130_downstream_initfn(PCIDevice *d)
PCIEPort *p = PCIE_PORT(d);
PCIESlot *s = PCIE_SLOT(d);
int rc;
+ Error *err = NULL;
pci_bridge_initfn(d, TYPE_PCIE_BUS);
pcie_port_init_reg(d);
rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
- XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
+ XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT, &err);
if (rc < 0) {
+ error_report_err(err);
goto err_bridge;
}
+
rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
if (rc < 0) {
goto err_bridge;
}
+
rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
p->port);
if (rc < 0) {
goto err_msi;
}
+
pcie_cap_flr_init(d);
pcie_cap_deverr_init(d);
pcie_cap_slot_init(d, s->slot);
diff --git a/hw/pci-bridge/xio3130_upstream.c b/hw/pci-bridge/xio3130_upstream.c
index 164ef58..a7f7987 100644
--- a/hw/pci-bridge/xio3130_upstream.c
+++ b/hw/pci-bridge/xio3130_upstream.c
@@ -56,26 +56,31 @@ static int xio3130_upstream_initfn(PCIDevice *d)
{
PCIEPort *p = PCIE_PORT(d);
int rc;
+ Error *err = NULL;
pci_bridge_initfn(d, TYPE_PCIE_BUS);
pcie_port_init_reg(d);
rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
- XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
+ XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT, &err);
if (rc < 0) {
+ error_report_err(err);
goto err_bridge;
}
+
rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
if (rc < 0) {
goto err_bridge;
}
+
rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
p->port);
if (rc < 0) {
goto err_msi;
}
+
pcie_cap_flr_init(d);
pcie_cap_deverr_init(d);
rc = pcie_aer_init(d, XIO3130_AER_OFFSET, PCI_ERR_SIZEOF);
diff --git a/hw/pci/msi.c b/hw/pci/msi.c
index e0e64c2..b1c8f8f 100644
--- a/hw/pci/msi.c
+++ b/hw/pci/msi.c
@@ -165,15 +165,32 @@ bool msi_enabled(const PCIDevice *dev)
PCI_MSI_FLAGS_ENABLE);
}
+/*
+ * Make PCI device @dev MSI-capable.
+ * Non-zero @offset puts capability MSI at that offset in PCI config
+ * space.
+ * @nr_vectors is the number of MSI vectors (1, 2, 4, 8, 16 or 32).
+ * If @msi64bit, make the device capable of sending a 64-bit message
+ * address.
+ * If @msi_per_vector_mask, make the device support per-vector masking.
+ * @errp is for returning errors.
+ * Return the offset of capability MSI in config space on success,
+ * set @errp and return -errno on error.
+ * -ENOTSUP means lacking msi support for a msi-capable platform.
+ */
int msi_init(struct PCIDevice *dev, uint8_t offset,
- unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask)
+ unsigned int nr_vectors, bool msi64bit,
+ bool msi_per_vector_mask, Error **errp)
{
unsigned int vectors_order;
uint16_t flags;
uint8_t cap_size;
int config_offset;
+ Error *err = NULL;
if (!msi_nonbroken) {
+ error_setg(&err, "MSI is not supported by interrupt controller");
+ error_propagate(errp, err);
I suppose error_setg(errp... is enough and you don't have to use also
error_propagate.
return -ENOTSUP;
}
@@ -197,8 +214,10 @@ int msi_init(struct PCIDevice *dev, uint8_t offset,
}
cap_size = msi_cap_sizeof(flags);
- config_offset = pci_add_capability(dev, PCI_CAP_ID_MSI, offset, cap_size);
+ config_offset = pci_add_capability2(dev, PCI_CAP_ID_MSI, offset,
+ cap_size, &err);
if (config_offset < 0) {
+ error_propagate(errp, err);
return config_offset;
}
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index a63a581..0aaf3af 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -2340,6 +2340,14 @@ static void megasas_scsi_realize(PCIDevice *dev, Error
**errp)
/* Interrupt pin 1 */
pci_conf[PCI_INTERRUPT_PIN] = 0x01;
+ if (megasas_use_msi(s)) {
+ msi_init(dev, 0x50, 1, true, false, errp);
+ if (*errp) {
+ s->flags &= ~MEGASAS_MASK_USE_MSI;
+ return;
+ }
+ }
+
memory_region_init_io(&s->mmio_io, OBJECT(s), &megasas_mmio_ops, s,
"megasas-mmio", 0x4000);
memory_region_init_io(&s->port_io, OBJECT(s), &megasas_port_ops, s,
@@ -2347,10 +2355,6 @@ static void megasas_scsi_realize(PCIDevice *dev, Error
**errp)
memory_region_init_io(&s->queue_io, OBJECT(s), &megasas_queue_ops, s,
"megasas-queue", 0x40000);
- if (megasas_use_msi(s) &&
- msi_init(dev, 0x50, 1, true, false)) {
This was a bug. msi_init returns non-zero value on both failure and success.
Your code fixes the bug by checking the errp. I think you should
fix the bug in a separate patch and only then apply this patch.
- s->flags &= ~MEGASAS_MASK_USE_MSI;
- }
if (megasas_use_msix(s) &&
msix_init(dev, 15, &s->mmio_io, b->mmio_bar, 0x2000,
&s->mmio_io, b->mmio_bar, 0x3800, 0x68)) {
diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
index 499c146..27350b7 100644
--- a/hw/scsi/mptsas.c
+++ b/hw/scsi/mptsas.c
@@ -1274,10 +1274,22 @@ static void mptsas_scsi_init(PCIDevice *dev, Error
**errp)
{
DeviceState *d = DEVICE(dev);
MPTSASState *s = MPT_SAS(dev);
+ Error *err = NULL;
dev->config[PCI_LATENCY_TIMER] = 0;
dev->config[PCI_INTERRUPT_PIN] = 0x01;
+ if (s->msi_available) {
+ if (msi_init(dev, 0, 1, true, false, &err) >= 0) {
+ s->msi_in_use = true;
+ }
+ else {
+ error_append_hint(&err, "MSI init fail, will use INTx instead");
The hint should end with a new line: "\n".
+ error_report_err(err);
You should not report the error if the fucntion has an **errp parameter.
+ }
+ }
+
+
memory_region_init_io(&s->mmio_io, OBJECT(s), &mptsas_mmio_ops, s,
"mptsas-mmio", 0x4000);
memory_region_init_io(&s->port_io, OBJECT(s), &mptsas_port_ops, s,
@@ -1285,11 +1297,6 @@ static void mptsas_scsi_init(PCIDevice *dev, Error
**errp)
memory_region_init_io(&s->diag_io, OBJECT(s), &mptsas_diag_ops, s,
"mptsas-diag", 0x10000);
- if (s->msi_available &&
- msi_init(dev, 0, 1, true, false) >= 0) {
- s->msi_in_use = true;
- }
-
pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->port_io);
pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_TYPE_32, &s->mmio_io);
diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c
index 9abc086..88fb611 100644
--- a/hw/scsi/vmw_pvscsi.c
+++ b/hw/scsi/vmw_pvscsi.c
@@ -1039,22 +1039,24 @@ pvscsi_io_read(void *opaque, hwaddr addr, unsigned size)
}
-static bool
+static void
pvscsi_init_msi(PVSCSIState *s)
{
int res;
+ Error *err = NULL;
PCIDevice *d = PCI_DEVICE(s);
res = msi_init(d, PVSCSI_MSI_OFFSET(s), PVSCSI_MSIX_NUM_VECTORS,
- PVSCSI_USE_64BIT, PVSCSI_PER_VECTOR_MASK);
+ PVSCSI_USE_64BIT, PVSCSI_PER_VECTOR_MASK, &err);
if (res < 0) {
trace_pvscsi_init_msi_fail(res);
+ error_append_hint(&err, "MSI capability fail to init,"
+ " will use INTx intead");
The same for this hint, should end with "\n"
+ error_report_err(err);
s->msi_used = false;
} else {
s->msi_used = true;
}
-
- return s->msi_used;
Refactoring the function to return void instead of bool
is out of the scope of this patch. You can take this out to a simple
patch.
}
static void
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index bcde8a2..f132a57 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -3588,6 +3588,13 @@ static void usb_xhci_realize(struct PCIDevice *dev,
Error **errp)
usb_xhci_init(xhci);
+ if (xhci_get_flag(xhci, XHCI_FLAG_USE_MSI)) {
+ ret = msi_init(dev, 0x70, xhci->numintrs, true, false, errp);
+ if (ret < 0) {
+ return;
+ }
+ }
+
if (xhci->numintrs > MAXINTRS) {
xhci->numintrs = MAXINTRS;
}
@@ -3645,9 +3652,6 @@ static void usb_xhci_realize(struct PCIDevice *dev, Error
**errp)
assert(ret >= 0);
}
- if (xhci_get_flag(xhci, XHCI_FLAG_USE_MSI)) {
- msi_init(dev, 0x70, xhci->numintrs, true, false);
- }
if (xhci_get_flag(xhci, XHCI_FLAG_USE_MSI_X)) {
msix_init(dev, xhci->numintrs,
&xhci->mem, 0, OFF_MSIX_TABLE,
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index d091d8c..55ceb67 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1171,6 +1171,7 @@ static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
uint16_t ctrl;
bool msi_64bit, msi_maskbit;
int ret, entries;
+ Error *err = NULL;
if (pread(vdev->vbasedev.fd, &ctrl, sizeof(ctrl),
vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
@@ -1184,12 +1185,13 @@ static int vfio_msi_setup(VFIOPCIDevice *vdev, int pos)
trace_vfio_msi_setup(vdev->vbasedev.name, pos);
- ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
+ ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit, &err);
if (ret < 0) {
if (ret == -ENOTSUP) {
return 0;
}
- error_report("vfio: msi_init failed");
+ error_prepend(&err, "vfio: msi_init failed: ");
+ error_report_err(err);
return ret;
}
vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 :
0);
diff --git a/include/hw/pci/msi.h b/include/hw/pci/msi.h
index 8124908..4837bcf 100644
--- a/include/hw/pci/msi.h
+++ b/include/hw/pci/msi.h
@@ -35,7 +35,8 @@ void msi_set_message(PCIDevice *dev, MSIMessage msg);
MSIMessage msi_get_message(PCIDevice *dev, unsigned int vector);
bool msi_enabled(const PCIDevice *dev);
int msi_init(struct PCIDevice *dev, uint8_t offset,
- unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask);
+ unsigned int nr_vectors, bool msi64bit,
+ bool msi_per_vector_mask, Error **errp);
void msi_uninit(struct PCIDevice *dev);
void msi_reset(PCIDevice *dev);
void msi_notify(PCIDevice *dev, unsigned int vector);
Thanks,
Marcel