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[Qemu-devel] [PATCH V2 3/3] msi: Handle remappable format interrupt requ
From: |
Lan Tianyu |
Subject: |
[Qemu-devel] [PATCH V2 3/3] msi: Handle remappable format interrupt request |
Date: |
Wed, 9 Aug 2017 16:51:22 -0400 |
From: Chao Gao <address@hidden>
According to VT-d spec Interrupt Remapping and Interrupt Posting ->
Interrupt Remapping -> Interrupt Request Formats On Intel 64
Platforms, fields of MSI data register have changed. This patch
avoids wrongly regarding a remappable format interrupt request as
an interrupt binded with an event channel.
Signed-off-by: Chao Gao <address@hidden>
Signed-off-by: Lan Tianyu <address@hidden>
Acked-by: Anthony PERARD <address@hidden>
---
hw/i386/xen/xen-hvm.c | 8 +++++++-
hw/pci/msi.c | 5 +++--
hw/pci/msix.c | 4 +++-
hw/xen/xen_pt_msi.c | 2 +-
include/hw/xen/xen.h | 2 +-
stubs/xen-hvm.c | 2 +-
6 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index d9ccd5d..cbbce73 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -145,8 +145,14 @@ void xen_piix_pci_write_config_client(uint32_t address,
uint32_t val, int len)
}
}
-int xen_is_pirq_msi(uint32_t msi_data)
+int xen_is_pirq_msi(uint32_t msi_addr_lo, uint32_t msi_data)
{
+ /* If the MSI address is configured in remapping format, the MSI will not
+ * be remapped into a pirq.
+ */
+ if (msi_addr_lo & MSI_ADDR_IF_MASK) {
+ return 0;
+ }
/* If vector is 0, the msi is remapped into a pirq, passed as
* dest_id.
*/
diff --git a/hw/pci/msi.c b/hw/pci/msi.c
index 5e05ce5..d05c876 100644
--- a/hw/pci/msi.c
+++ b/hw/pci/msi.c
@@ -289,7 +289,7 @@ void msi_reset(PCIDevice *dev)
static bool msi_is_masked(const PCIDevice *dev, unsigned int vector)
{
uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
- uint32_t mask, data;
+ uint32_t mask, data, addr_lo;
bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
assert(vector < PCI_MSI_VECTORS_MAX);
@@ -298,7 +298,8 @@ static bool msi_is_masked(const PCIDevice *dev, unsigned
int vector)
}
data = pci_get_word(dev->config + msi_data_off(dev, msi64bit));
- if (xen_is_pirq_msi(data)) {
+ addr_lo = pci_get_long(dev->config + msi_address_lo_off(dev));
+ if (xen_is_pirq_msi(addr_lo, data)) {
return false;
}
diff --git a/hw/pci/msix.c b/hw/pci/msix.c
index 5078d3d..65cf00c 100644
--- a/hw/pci/msix.c
+++ b/hw/pci/msix.c
@@ -83,9 +83,11 @@ static bool msix_vector_masked(PCIDevice *dev, unsigned int
vector, bool fmask)
{
unsigned offset = vector * PCI_MSIX_ENTRY_SIZE;
uint8_t *data = &dev->msix_table[offset + PCI_MSIX_ENTRY_DATA];
+ uint8_t *addr_lo = &dev->msix_table[offset + PCI_MSIX_ENTRY_LOWER_ADDR];
/* MSIs on Xen can be remapped into pirqs. In those cases, masking
* and unmasking go through the PV evtchn path. */
- if (xen_enabled() && xen_is_pirq_msi(pci_get_long(data))) {
+ if (xen_enabled() && xen_is_pirq_msi(pci_get_long(addr_lo),
+ pci_get_long(data))) {
return false;
}
return fmask || dev->msix_table[offset + PCI_MSIX_ENTRY_VECTOR_CTRL] &
diff --git a/hw/xen/xen_pt_msi.c b/hw/xen/xen_pt_msi.c
index 5c5d15a..82e13b2 100644
--- a/hw/xen/xen_pt_msi.c
+++ b/hw/xen/xen_pt_msi.c
@@ -114,7 +114,7 @@ static int msi_msix_setup(XenPCIPassthroughState *s,
assert((!is_msix && msix_entry == 0) || is_msix);
- if (xen_is_pirq_msi(data)) {
+ if (xen_is_pirq_msi(addr, data)) {
*ppirq = msi_ext_dest_id(addr >> 32) | msi_dest_id(addr);
if (!*ppirq) {
/* this probably identifies an misconfiguration of the guest,
diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h
index 7efcdaa..0d6c83e 100644
--- a/include/hw/xen/xen.h
+++ b/include/hw/xen/xen.h
@@ -34,7 +34,7 @@ int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num);
void xen_piix3_set_irq(void *opaque, int irq_num, int level);
void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len);
void xen_hvm_inject_msi(uint64_t addr, uint32_t data);
-int xen_is_pirq_msi(uint32_t msi_data);
+int xen_is_pirq_msi(uint32_t msi_addr_lo, uint32_t msi_data);
qemu_irq *xen_interrupt_controller_init(void);
diff --git a/stubs/xen-hvm.c b/stubs/xen-hvm.c
index 3ca6c51..aeb1592 100644
--- a/stubs/xen-hvm.c
+++ b/stubs/xen-hvm.c
@@ -31,7 +31,7 @@ void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
{
}
-int xen_is_pirq_msi(uint32_t msi_data)
+int xen_is_pirq_msi(uint32_t msi_addr_lo, uint32_t msi_data)
{
return 0;
}
--
1.8.3.1