[Qemu-devel] [PATCH] virtio-serial: Allow one MSI-X vector per virtqueue

From: Hongyong Zang zanghongy...@huawei.com In pci_enable_msix(), the guest's virtio-serial driver tries to set msi-x with one vector per queue. But it fails and eventually all virtio-serial ports share one MSI-X vector. Because every virtio-serial port has *two* virtqueues, virtio-serial needs

[Qemu-devel] [PATCH v3 0/3] ivshmem: add a new PIO BAR4(Doorbell) besides MMIO BAR0 to reduce notification time

From: Hongyong Zang zanghongy...@huawei.com This patch series, adds a PIO BAR4 for guest notifying qemu. And the new notification way of PIO BAR4 reduces 30% time in comparison with the original MMIO BAR0 way. Meantime, this patch adds a memory API named kvm_set_ioeventfd_pio_long which is about

[Qemu-devel] [PATCH v3 2/3] ivshmem: add a new PIO BAR4(Doorbell) to reduce notification time

From: Hongyong Zang zanghongy...@huawei.com This patch adds a PIO BAR4 for guest notifying qemu to reduce notification time. And the new notification way of PIO BAR4 reduces 30% time in comparison with the original MMIO BAR0 way. Also, this patch introduces a new feature named IVSHMEM_PIO_NOTIFY

[Qemu-devel] [PATCH v3 3/3] ivshmem: update the spec

From: Hongyong Zang zanghongy...@huawei.com Signed-off-by: Hongyong Zang zanghongy...@huawei.com --- docs/specs/ivshmem_device_spec.txt |8 ++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/specs/ivshmem_device_spec.txt b/docs/specs/ivshmem_device_spec.txt index

[Qemu-devel] [PATCH v3 1/3] memory: add a memory API about ioeventfd for PIO long

From: Hongyong Zang zanghongy...@huawei.com The new memory API, named kvm_set_ioeventfd_pio_long, is about ioeventfd for PIO long. Signed-off-by: Hongyong Zang zanghongy...@huawei.com --- kvm-all.c | 23 +++ kvm-stub.c |5 + kvm.h |1 + memory.c | 20

[Qemu-devel] [PATCH] ivshmem: fix guest unable to start with ioeventfd

From: Hongyong Zang zanghongy...@huawei.com When a guest boots with ioeventfd, an error (by gdb) occurs: Program received signal SIGSEGV, Segmentation fault. 0x006009cc in setup_ioeventfds (s=0x171dc40) at /home/louzhengwei/git_source/qemu-kvm/hw/ivshmem.c:363 363

[Qemu-devel] [PATCH] ivshmem: fix PCI BAR2 registration during initialization

From: Hongyong Zang zanghongy...@huawei.com Ivshmem cannot work, and the command lspci cannot show ivshmem BAR2 in the guest. As for pci_register_bar(), parameter MemoryRegion should be s-bar instead of s-ivshmem. Signed-off-by: Hongyong Zang zanghongy...@huawei.com --- hw/ivshmem.c |2 +-

[Qemu-devel] [PATCH v2] ivshmem: add a new PIO BAR3(Doorbell) besides MMIO BAR0 to reduce notification time

From: Hongyong Zang zanghongy...@huawei.com This patch, adds a PIO BAR3 for guest notifying qemu. And we find the new notification way of PIO BAR3 reduces 30% time in comparison with the original MMIO BAR0 way. Signed-off-by: Hongyong Zang zanghongy...@huawei.com --- hw/ivshmem.c | 24

[Qemu-devel] [PATCH] ivshmem: use PIO for BAR0(Doorbell) instead of MMIO to reduce notification time

From: Hongyong Zang zanghongy...@huawei.com Ivshmem(nahanni) is a mechanism for sharing host memory with VMs running on the same host. Currently, guest notifies qemu by reading or writing ivshmem device's PCI MMIO BAR0(Doorbell). This patch, changes this PCI MMIO BAR0(Doorbell) to PIO. And we