similar to: [PATCHv3 03/13] qemu: add routines to manage PCI capabilities

Add routines to manage PCI capability list. First user will be MSI-X. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- hw/pci.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++------ hw/pci.h | 18 +++++++++++- 2 files changed, 106 insertions(+), 10 deletions(-) diff --git a/hw/pci.c b/hw/pci.c index 5dcfb4e..6bc3819 100644 --- a/hw/pci.c +++ b/hw/pci.c @@

Add routines to manage PCI capability list. First user will be MSI-X. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- hw/pci.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++------ hw/pci.h | 18 +++++++++++- 2 files changed, 106 insertions(+), 10 deletions(-) diff --git a/hw/pci.c b/hw/pci.c index 5dcfb4e..6bc3819 100644 --- a/hw/pci.c +++ b/hw/pci.c @@

Add "cmask" table of constant register masks: if a bit is not writeable and is set in cmask table, this bit is checked on load. An attempt to load an image that would change such a register causes load to fail. Use this table to make sure that load does not modify registers that guest can not change (directly or indirectly). Note: we can't just assume that read-only registers never

Add "cmask" table of constant register masks: if a bit is not writeable and is set in cmask table, this bit is checked on load. An attempt to load an image that would change such a register causes load to fail. Use this table to make sure that load does not modify registers that guest can not change (directly or indirectly). Note: we can't just assume that read-only registers never

This adds MSI-X support infrastructure and uses that to enable MSI-X support in virtio net device. Also add a global option to disable MSI-X. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/device-assignment.c | 2 + hw/msix.c | 447 ++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 38 ++++ hw/pci.c

This adds MSI-X support infrastructure and uses that to enable MSI-X support in virtio net device. Also add a global option to disable MSI-X. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/device-assignment.c | 2 + hw/msix.c | 447 ++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 38 ++++ hw/pci.c

This adds (incomplete) MSI-X support to virtio net device. Missing is save/load support, and command-line flag to control the feature. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 362 +++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 33 +++++ hw/pci.c | 35 ++++-- hw/pci.h

This adds (incomplete) MSI-X support to virtio net device. Missing is save/load support, and command-line flag to control the feature. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 362 +++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 33 +++++ hw/pci.c | 35 ++++-- hw/pci.h

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 423 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 35 +++++ hw/pci.h | 20 +++ 4

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 423 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 35 +++++ hw/pci.h | 20 +++ 4

Make it possible to resize PCI regions. This will be used by virtio with MSI-X, where the region size depends on whether MSI-X is enabled, and can change across load/save. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- hw/pci.c | 53 +++++++++++++++++++++++++++++++++++------------------ hw/pci.h | 2 ++ 2 files changed, 37 insertions(+), 18 deletions(-) diff --git

Make it possible to resize PCI regions. This will be used by virtio with MSI-X, where the region size depends on whether MSI-X is enabled, and can change across load/save. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- hw/pci.c | 53 +++++++++++++++++++++++++++++++++++------------------ hw/pci.h | 2 ++ 2 files changed, 37 insertions(+), 18 deletions(-) diff --git

MSIX spec requires that device can be operated with all vectors masked, by polling. So the following patchset (lightly tested) adds this ability: when driver reads ISR, the device recalls a pending notification, and returns pending status in the ISR register. The polling driver can operate as follows: - map all VQs and config to the same vector - poll ISR to get status - this also flushes VQ

MSIX spec requires that device can be operated with all vectors masked, by polling. So the following patchset (lightly tested) adds this ability: when driver reads ISR, the device recalls a pending notification, and returns pending status in the ISR register. The polling driver can operate as follows: - map all VQs and config to the same vector - poll ISR to get status - this also flushes VQ

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2