From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34979) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFFTN-0007Js-Vl for qemu-devel@nongnu.org; Wed, 15 Jul 2015 01:43:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZFFTM-00055b-7v for qemu-devel@nongnu.org; Wed, 15 Jul 2015 01:43:13 -0400 Received: from mga11.intel.com ([192.55.52.93]:50366) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFFTL-000531-Tv for qemu-devel@nongnu.org; Wed, 15 Jul 2015 01:43:12 -0400 From: Tiejun Chen Date: Wed, 15 Jul 2015 13:37:45 +0800 Message-Id: <1436938670-7677-6-git-send-email-tiejun.chen@intel.com> In-Reply-To: <1436938670-7677-1-git-send-email-tiejun.chen@intel.com> References: <1436938670-7677-1-git-send-email-tiejun.chen@intel.com> Subject: [Qemu-devel] [v10][PATCH 05/10] xen, gfx passthrough: basic graphics passthrough support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: stefano.stabellini@eu.citrix.com, mst@redhat.com, pbonzini@redhat.com, ehabkost@redhat.com, rth@twiddle.net Cc: qemu-devel@nongnu.org basic gfx passthrough support: - add a vga type for gfx passthrough - register/unregister legacy VGA I/O ports and MMIOs for passthrough GFX Signed-off-by: Tiejun Chen Signed-off-by: Yang Zhang Acked-by: Stefano Stabellini --- v10: * Nothing is changed. v9: * Just rebase on the latest. hw/core/machine.c | 20 ++++++++ hw/xen/Makefile.objs | 1 + hw/xen/xen-host-pci-device.c | 5 ++ hw/xen/xen-host-pci-device.h | 1 + hw/xen/xen_pt.c | 4 ++ hw/xen/xen_pt.h | 10 +++- hw/xen/xen_pt_graphics.c | 111 +++++++++++++++++++++++++++++++++++++++++++ include/hw/boards.h | 1 + qemu-options.hx | 3 ++ vl.c | 10 ++++ 10 files changed, 165 insertions(+), 1 deletion(-) create mode 100644 hw/xen/xen_pt_graphics.c diff --git a/hw/core/machine.c b/hw/core/machine.c index ac4654e..51ed6b2 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -226,6 +226,20 @@ static void machine_set_usb(Object *obj, bool value, Error **errp) ms->usb_disabled = !value; } +static bool machine_get_igd_gfx_passthru(Object *obj, Error **errp) +{ + MachineState *ms = MACHINE(obj); + + return ms->igd_gfx_passthru; +} + +static void machine_set_igd_gfx_passthru(Object *obj, bool value, Error **errp) +{ + MachineState *ms = MACHINE(obj); + + ms->igd_gfx_passthru = value; +} + static char *machine_get_firmware(Object *obj, Error **errp) { MachineState *ms = MACHINE(obj); @@ -388,6 +402,12 @@ static void machine_initfn(Object *obj) object_property_set_description(obj, "usb", "Set on/off to enable/disable usb", NULL); + object_property_add_bool(obj, "igd-passthru", + machine_get_igd_gfx_passthru, + machine_set_igd_gfx_passthru, NULL); + object_property_set_description(obj, "igd-passthru", + "Set on/off to enable/disable igd passthrou", + NULL); object_property_add_str(obj, "firmware", machine_get_firmware, machine_set_firmware, NULL); diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs index a0ca0aa..a9ad7e7 100644 --- a/hw/xen/Makefile.objs +++ b/hw/xen/Makefile.objs @@ -3,3 +3,4 @@ common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o xen_devconfig.o obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o +obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o xen_pt_graphics.o diff --git a/hw/xen/xen-host-pci-device.c b/hw/xen/xen-host-pci-device.c index 743b37b..a54b7de 100644 --- a/hw/xen/xen-host-pci-device.c +++ b/hw/xen/xen-host-pci-device.c @@ -376,6 +376,11 @@ int xen_host_pci_device_get(XenHostPCIDevice *d, uint16_t domain, goto error; } d->irq = v; + rc = xen_host_pci_get_hex_value(d, "class", &v); + if (rc) { + goto error; + } + d->class_code = v; d->is_virtfn = xen_host_pci_dev_is_virtfn(d); return 0; diff --git a/hw/xen/xen-host-pci-device.h b/hw/xen/xen-host-pci-device.h index c2486f0..f1e1c30 100644 --- a/hw/xen/xen-host-pci-device.h +++ b/hw/xen/xen-host-pci-device.h @@ -25,6 +25,7 @@ typedef struct XenHostPCIDevice { uint16_t vendor_id; uint16_t device_id; + uint32_t class_code; int irq; XenHostPCIIORegion io_regions[PCI_NUM_REGIONS - 1]; diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c index ed5fcae..42380c3 100644 --- a/hw/xen/xen_pt.c +++ b/hw/xen/xen_pt.c @@ -502,6 +502,7 @@ static int xen_pt_register_regions(XenPCIPassthroughState *s, uint16_t *cmd) d->rom.size, d->rom.base_addr); } + xen_pt_register_vga_regions(d); return 0; } @@ -801,6 +802,7 @@ out: static void xen_pt_unregister_device(PCIDevice *d) { XenPCIPassthroughState *s = XEN_PT_DEVICE(d); + XenHostPCIDevice *host_dev = &s->real_device; uint8_t machine_irq = s->machine_irq; uint8_t intx = xen_pt_pci_intx(s); int rc; @@ -844,6 +846,8 @@ static void xen_pt_unregister_device(PCIDevice *d) /* delete all emulated config registers */ xen_pt_config_delete(s); + xen_pt_unregister_vga_regions(host_dev); + memory_listener_unregister(&s->memory_listener); memory_listener_unregister(&s->io_listener); diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h index 393f36c..5eb3c52 100644 --- a/hw/xen/xen_pt.h +++ b/hw/xen/xen_pt.h @@ -305,5 +305,13 @@ static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar) return s->msix && s->msix->bar_index == bar; } - +extern bool has_igd_gfx_passthru; +static inline bool is_igd_vga_passthrough(XenHostPCIDevice *dev) +{ + return (has_igd_gfx_passthru + && ((dev->class_code >> 0x8) == PCI_CLASS_DISPLAY_VGA)); +} +int xen_pt_register_vga_regions(XenHostPCIDevice *dev); +int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev); +int xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev); #endif /* !XEN_PT_H */ diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c new file mode 100644 index 0000000..9b3df81 --- /dev/null +++ b/hw/xen/xen_pt_graphics.c @@ -0,0 +1,111 @@ +/* + * graphics passthrough + */ +#include "xen_pt.h" +#include "xen-host-pci-device.h" +#include "hw/xen/xen_backend.h" + +typedef struct VGARegion { + int type; /* Memory or port I/O */ + uint64_t guest_base_addr; + uint64_t machine_base_addr; + uint64_t size; /* size of the region */ + int rc; +} VGARegion; + +#define IORESOURCE_IO 0x00000100 +#define IORESOURCE_MEM 0x00000200 + +static struct VGARegion vga_args[] = { + { + .type = IORESOURCE_IO, + .guest_base_addr = 0x3B0, + .machine_base_addr = 0x3B0, + .size = 0xC, + .rc = -1, + }, + { + .type = IORESOURCE_IO, + .guest_base_addr = 0x3C0, + .machine_base_addr = 0x3C0, + .size = 0x20, + .rc = -1, + }, + { + .type = IORESOURCE_MEM, + .guest_base_addr = 0xa0000 >> XC_PAGE_SHIFT, + .machine_base_addr = 0xa0000 >> XC_PAGE_SHIFT, + .size = 0x20, + .rc = -1, + }, +}; + +/* + * register VGA resources for the domain with assigned gfx + */ +int xen_pt_register_vga_regions(XenHostPCIDevice *dev) +{ + int i = 0; + + if (!is_igd_vga_passthrough(dev)) { + return 0; + } + + for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) { + if (vga_args[i].type == IORESOURCE_IO) { + vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid, + vga_args[i].guest_base_addr, + vga_args[i].machine_base_addr, + vga_args[i].size, DPCI_ADD_MAPPING); + } else { + vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid, + vga_args[i].guest_base_addr, + vga_args[i].machine_base_addr, + vga_args[i].size, DPCI_ADD_MAPPING); + } + + if (vga_args[i].rc) { + XEN_PT_ERR(NULL, "VGA %s mapping failed! (rc: %i)\n", + vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory", + vga_args[i].rc); + return vga_args[i].rc; + } + } + + return 0; +} + +/* + * unregister VGA resources for the domain with assigned gfx + */ +int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev) +{ + int i = 0; + + if (!is_igd_vga_passthrough(dev)) { + return 0; + } + + for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) { + if (vga_args[i].type == IORESOURCE_IO) { + vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid, + vga_args[i].guest_base_addr, + vga_args[i].machine_base_addr, + vga_args[i].size, DPCI_REMOVE_MAPPING); + } else { + vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid, + vga_args[i].guest_base_addr, + vga_args[i].machine_base_addr, + vga_args[i].size, DPCI_REMOVE_MAPPING); + } + + if (vga_args[i].rc) { + XEN_PT_ERR(NULL, "VGA %s unmapping failed! (rc: %i)\n", + vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory", + vga_args[i].rc); + return vga_args[i].rc; + } + } + + return 0; +} diff --git a/include/hw/boards.h b/include/hw/boards.h index 2aec9cb..4a0ee05 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -136,6 +136,7 @@ struct MachineState { bool mem_merge; bool usb; bool usb_disabled; + bool igd_gfx_passthru; char *firmware; bool iommu; bool suppress_vmdesc; diff --git a/qemu-options.hx b/qemu-options.hx index 7b8efbf..e4cfa90 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -38,6 +38,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ " dump-guest-core=on|off include guest memory in a core dump (default=on)\n" " mem-merge=on|off controls memory merge support (default: on)\n" " iommu=on|off controls emulated Intel IOMMU (VT-d) support (default=off)\n" + " igd-passthru=on|off controls IGD GFX passthrough support (default=off)\n" " aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n" " dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n" " suppress-vmdesc=on|off disables self-describing migration (default=off)\n", @@ -55,6 +56,8 @@ than one accelerator specified, the next one is used if the previous one fails to initialize. @item kernel_irqchip=on|off Enables in-kernel irqchip support for the chosen accelerator when available. +@item gfx_passthru=on|off +Enables IGD GFX passthrough support for the chosen machine when available. @item vmport=on|off|auto Enables emulation of VMWare IO port, for vmmouse etc. auto says to select the value based on accel. For accel=xen the default is off otherwise the default diff --git a/vl.c b/vl.c index 3f269dc..9dc5b9b 100644 --- a/vl.c +++ b/vl.c @@ -1338,6 +1338,13 @@ static inline void semihosting_arg_fallback(const char *file, const char *cmd) } } +/* Now we still need this for compatibility with XEN. */ +bool has_igd_gfx_passthru; +static void igd_gfx_passthru(void) +{ + has_igd_gfx_passthru = current_machine->igd_gfx_passthru; +} + /***********************************************************/ /* USB devices */ @@ -4528,6 +4535,9 @@ int main(int argc, char **argv, char **envp) exit(1); } + /* Check if IGD GFX passthrough. */ + igd_gfx_passthru(); + /* init generic devices */ if (qemu_opts_foreach(qemu_find_opts("device"), device_init_func, NULL, NULL)) { -- 1.9.1