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Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest

Browse Source 
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest: (45 commits)
  Use "struct boot_params" in example launcher
  Loading bzImage directly.
  Revert lguest magic and use hook in head.S
  Update lguest documentation to reflect the new virtual block device name.
  generalize lgread_u32/lgwrite_u32.
  Example launcher handle guests not being ready for input
  Update example launcher for virtio
  Lguest support for Virtio
  Remove old lguest I/O infrrasructure.
  Remove old lguest bus and drivers.
  Virtio helper routines for a descriptor ringbuffer implementation
  Module autoprobing support for virtio drivers.
  Virtio console driver
  Block driver using virtio.
  Net driver using virtio
  Virtio interface
  Boot with virtual == physical to get closer to native Linux.
  Allow guest to specify syscall vector to use.
  Rename "cr3" to "gpgdir" to avoid x86-specific naming.
  Pagetables to use normal kernel types
  ...
This commit is contained in:
Linus Torvalds
2007-10-23 09:03:07 -07:00
parent a98ce5c6fe 43d33b21a0
commit 0d6810091c
70 changed files with 4817 additions and 4396 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-x86/Kbuild
+3
View File
@@ -1,6 +1,7 @@
include include/asm-generic/Kbuild.asm
header-y += boot.h
header-y += bootparam.h
header-y += debugreg.h
header-y += ldt.h
header-y += msr-index.h
@@ -14,8 +15,10 @@ unifdef-y += a.out_32.h
unifdef-y += a.out_64.h
unifdef-y += byteorder_32.h
unifdef-y += byteorder_64.h
unifdef-y += e820.h
unifdef-y += elf_32.h
unifdef-y += elf_64.h
unifdef-y += ist.h
unifdef-y += mce.h
unifdef-y += msgbuf_32.h
unifdef-y += msgbuf_64.h
include/asm-x86/bootparam.h
+54 -54
View File
@@ -10,85 +10,85 @@
#include <video/edid.h>
struct setup_header {
u8 setup_sects;
u16 root_flags;
u32 syssize;
u16 ram_size;
__u8 setup_sects;
__u16 root_flags;
__u32 syssize;
__u16 ram_size;
#define RAMDISK_IMAGE_START_MASK 0x07FF
#define RAMDISK_PROMPT_FLAG 0x8000
#define RAMDISK_LOAD_FLAG 0x4000
u16 vid_mode;
u16 root_dev;
u16 boot_flag;
u16 jump;
u32 header;
u16 version;
u32 realmode_swtch;
u16 start_sys;
u16 kernel_version;
u8 type_of_loader;
u8 loadflags;
__u16 vid_mode;
__u16 root_dev;
__u16 boot_flag;
__u16 jump;
__u32 header;
__u16 version;
__u32 realmode_swtch;
__u16 start_sys;
__u16 kernel_version;
__u8 type_of_loader;
__u8 loadflags;
#define LOADED_HIGH (1<<0)
#define KEEP_SEGMENTS (1<<6)
#define CAN_USE_HEAP (1<<7)
u16 setup_move_size;
u32 code32_start;
u32 ramdisk_image;
u32 ramdisk_size;
u32 bootsect_kludge;
u16 heap_end_ptr;
u16 _pad1;
u32 cmd_line_ptr;
u32 initrd_addr_max;
u32 kernel_alignment;
u8 relocatable_kernel;
u8 _pad2[3];
u32 cmdline_size;
u32 hardware_subarch;
u64 hardware_subarch_data;
__u16 setup_move_size;
__u32 code32_start;
__u32 ramdisk_image;
__u32 ramdisk_size;
__u32 bootsect_kludge;
__u16 heap_end_ptr;
__u16 _pad1;
__u32 cmd_line_ptr;
__u32 initrd_addr_max;
__u32 kernel_alignment;
__u8 relocatable_kernel;
__u8 _pad2[3];
__u32 cmdline_size;
__u32 hardware_subarch;
__u64 hardware_subarch_data;
} __attribute__((packed));
struct sys_desc_table {
u16 length;
u8 table[14];
__u16 length;
__u8 table[14];
};
struct efi_info {
u32 _pad1;
u32 efi_systab;
u32 efi_memdesc_size;
u32 efi_memdesc_version;
u32 efi_memmap;
u32 efi_memmap_size;
u32 _pad2[2];
__u32 _pad1;
__u32 efi_systab;
__u32 efi_memdesc_size;
__u32 efi_memdesc_version;
__u32 efi_memmap;
__u32 efi_memmap_size;
__u32 _pad2[2];
};
/* The so-called "zeropage" */
struct boot_params {
struct screen_info screen_info; /* 0x000 */
struct apm_bios_info apm_bios_info; /* 0x040 */
u8 _pad2[12]; /* 0x054 */
__u8 _pad2[12]; /* 0x054 */
struct ist_info ist_info; /* 0x060 */
u8 _pad3[16]; /* 0x070 */
u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
__u8 _pad3[16]; /* 0x070 */
__u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
__u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
struct sys_desc_table sys_desc_table; /* 0x0a0 */
u8 _pad4[144]; /* 0x0b0 */
__u8 _pad4[144]; /* 0x0b0 */
struct edid_info edid_info; /* 0x140 */
struct efi_info efi_info; /* 0x1c0 */
u32 alt_mem_k; /* 0x1e0 */
u32 scratch; /* Scratch field! */ /* 0x1e4 */
u8 e820_entries; /* 0x1e8 */
u8 eddbuf_entries; /* 0x1e9 */
u8 edd_mbr_sig_buf_entries; /* 0x1ea */
u8 _pad6[6]; /* 0x1eb */
__u32 alt_mem_k; /* 0x1e0 */
__u32 scratch; /* Scratch field! */ /* 0x1e4 */
__u8 e820_entries; /* 0x1e8 */
__u8 eddbuf_entries; /* 0x1e9 */
__u8 edd_mbr_sig_buf_entries; /* 0x1ea */
__u8 _pad6[6]; /* 0x1eb */
struct setup_header hdr; /* setup header */ /* 0x1f1 */
u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
__u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
struct e820entry e820_map[E820MAX]; /* 0x2d0 */
u8 _pad8[48]; /* 0xcd0 */
__u8 _pad8[48]; /* 0xcd0 */
struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
u8 _pad9[276]; /* 0xeec */
__u8 _pad9[276]; /* 0xeec */
} __attribute__((packed));
#endif /* _ASM_BOOTPARAM_H */
include/asm-x86/e820.h
+28
View File
@@ -1,5 +1,33 @@
#ifndef __ASM_E820_H
#define __ASM_E820_H
#define E820MAP 0x2d0 /* our map */
#define E820MAX 128 /* number of entries in E820MAP */
#define E820NR 0x1e8 /* # entries in E820MAP */
#define E820_RAM 1
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#ifndef __ASSEMBLY__
struct e820entry {
__u64 addr; /* start of memory segment */
__u64 size; /* size of memory segment */
__u32 type; /* type of memory segment */
} __attribute__((packed));
struct e820map {
__u32 nr_map;
struct e820entry map[E820MAX];
};
#endif /* __ASSEMBLY__ */
#ifdef __KERNEL__
#ifdef CONFIG_X86_32
# include "e820_32.h"
#else
# include "e820_64.h"
#endif
#endif /* __KERNEL__ */
#endif /* __ASM_E820_H */
include/asm-x86/e820_32.h
-21
View File
@@ -12,30 +12,10 @@
#ifndef __E820_HEADER
#define __E820_HEADER
#define E820MAP 0x2d0 /* our map */
#define E820MAX 128 /* number of entries in E820MAP */
#define E820NR 0x1e8 /* # entries in E820MAP */
#define E820_RAM 1
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#define HIGH_MEMORY (1024*1024)
#ifndef __ASSEMBLY__
struct e820entry {
u64 addr; /* start of memory segment */
u64 size; /* size of memory segment */
u32 type; /* type of memory segment */
} __attribute__((packed));
struct e820map {
u32 nr_map;
struct e820entry map[E820MAX];
};
extern struct e820map e820;
extern int e820_all_mapped(unsigned long start, unsigned long end,
@@ -56,5 +36,4 @@ static inline void e820_mark_nosave_regions(void)
#endif
#endif/*!__ASSEMBLY__*/
#endif/*__E820_HEADER*/
include/asm-x86/e820_64.h
-20
View File
@@ -11,27 +11,7 @@
#ifndef __E820_HEADER
#define __E820_HEADER
#define E820MAP 0x2d0 /* our map */
#define E820MAX 128 /* number of entries in E820MAP */
#define E820NR 0x1e8 /* # entries in E820MAP */
#define E820_RAM 1
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#ifndef __ASSEMBLY__
struct e820entry {
u64 addr; /* start of memory segment */
u64 size; /* size of memory segment */
u32 type; /* type of memory segment */
} __attribute__((packed));
struct e820map {
u32 nr_map;
struct e820entry map[E820MAX];
};
extern unsigned long find_e820_area(unsigned long start, unsigned long end,
unsigned size);
extern void add_memory_region(unsigned long start, unsigned long size,
include/asm-x86/ist.h
+6 -6
View File
@@ -17,17 +17,17 @@
*/
#ifdef __KERNEL__
#include <linux/types.h>
struct ist_info {
u32 signature;
u32 command;
u32 event;
u32 perf_level;
__u32 signature;
__u32 command;
__u32 event;
__u32 perf_level;
};
#ifdef __KERNEL__
extern struct ist_info ist_info;
#endif /* __KERNEL__ */
include/asm-x86/lguest.h
+86
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@@ -0,0 +1,86 @@
#ifndef _X86_LGUEST_H
#define _X86_LGUEST_H
#define GDT_ENTRY_LGUEST_CS 10
#define GDT_ENTRY_LGUEST_DS 11
#define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8)
#define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8)
#ifndef __ASSEMBLY__
#include <asm/desc.h>
#define GUEST_PL 1
/* Every guest maps the core switcher code. */
#define SHARED_SWITCHER_PAGES \
DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE)
/* Pages for switcher itself, then two pages per cpu */
#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS)
/* We map at -4M for ease of mapping into the guest (one PTE page). */
#define SWITCHER_ADDR 0xFFC00000
/* Found in switcher.S */
extern unsigned long default_idt_entries[];
struct lguest_regs
{
/* Manually saved part. */
unsigned long eax, ebx, ecx, edx;
unsigned long esi, edi, ebp;
unsigned long gs;
unsigned long fs, ds, es;
unsigned long trapnum, errcode;
/* Trap pushed part */
unsigned long eip;
unsigned long cs;
unsigned long eflags;
unsigned long esp;
unsigned long ss;
};
/* This is a guest-specific page (mapped ro) into the guest. */
struct lguest_ro_state
{
/* Host information we need to restore when we switch back. */
u32 host_cr3;
struct Xgt_desc_struct host_idt_desc;
struct Xgt_desc_struct host_gdt_desc;
u32 host_sp;
/* Fields which are used when guest is running. */
struct Xgt_desc_struct guest_idt_desc;
struct Xgt_desc_struct guest_gdt_desc;
struct i386_hw_tss guest_tss;
struct desc_struct guest_idt[IDT_ENTRIES];
struct desc_struct guest_gdt[GDT_ENTRIES];
};
struct lguest_arch
{
/* The GDT entries copied into lguest_ro_state when running. */
struct desc_struct gdt[GDT_ENTRIES];
/* The IDT entries: some copied into lguest_ro_state when running. */
struct desc_struct idt[IDT_ENTRIES];
/* The address of the last guest-visible pagefault (ie. cr2). */
unsigned long last_pagefault;
};
static inline void lguest_set_ts(void)
{
u32 cr0;
cr0 = read_cr0();
if (!(cr0 & 8))
write_cr0(cr0|8);
}
/* Full 4G segment descriptors, suitable for CS and DS. */
#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
#endif /* __ASSEMBLY__ */
#endif
include/asm-x86/lguest_hcall.h
+71
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@@ -0,0 +1,71 @@
/* Architecture specific portion of the lguest hypercalls */
#ifndef _X86_LGUEST_HCALL_H
#define _X86_LGUEST_HCALL_H
#define LHCALL_FLUSH_ASYNC 0
#define LHCALL_LGUEST_INIT 1
#define LHCALL_CRASH 2
#define LHCALL_LOAD_GDT 3
#define LHCALL_NEW_PGTABLE 4
#define LHCALL_FLUSH_TLB 5
#define LHCALL_LOAD_IDT_ENTRY 6
#define LHCALL_SET_STACK 7
#define LHCALL_TS 8
#define LHCALL_SET_CLOCKEVENT 9
#define LHCALL_HALT 10
#define LHCALL_SET_PTE 14
#define LHCALL_SET_PMD 15
#define LHCALL_LOAD_TLS 16
#define LHCALL_NOTIFY 17
/*G:031 First, how does our Guest contact the Host to ask for privileged
* operations? There are two ways: the direct way is to make a "hypercall",
* to make requests of the Host Itself.
*
* Our hypercall mechanism uses the highest unused trap code (traps 32 and
* above are used by real hardware interrupts). Seventeen hypercalls are
* available: the hypercall number is put in the %eax register, and the
* arguments (when required) are placed in %edx, %ebx and %ecx. If a return
* value makes sense, it's returned in %eax.
*
* Grossly invalid calls result in Sudden Death at the hands of the vengeful
* Host, rather than returning failure. This reflects Winston Churchill's
* definition of a gentleman: "someone who is only rude intentionally". */
#define LGUEST_TRAP_ENTRY 0x1F
#ifndef __ASSEMBLY__
#include <asm/hw_irq.h>
static inline unsigned long
hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
/* "int" is the Intel instruction to trigger a trap. */
asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY)
/* The call is in %eax (aka "a"), and can be replaced */
: "=a"(call)
/* The other arguments are in %eax, %edx, %ebx & %ecx */
: "a"(call), "d"(arg1), "b"(arg2), "c"(arg3)
/* "memory" means this might write somewhere in memory.
* This isn't true for all calls, but it's safe to tell
* gcc that it might happen so it doesn't get clever. */
: "memory");
return call;
}
/*:*/
void async_hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3);
/* Can't use our min() macro here: needs to be a constant */
#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
#define LHCALL_RING_SIZE 64
struct hcall_args
{
/* These map directly onto eax, ebx, ecx, edx in struct lguest_regs */
unsigned long arg0, arg2, arg3, arg1;
};
#endif /* !__ASSEMBLY__ */
#endif /* _I386_LGUEST_HCALL_H */
include/linux/Kbuild
+5
View File
@@ -186,6 +186,7 @@ unifdef-y += cyclades.h
unifdef-y += dccp.h
unifdef-y += dirent.h
unifdef-y += dlm.h
unifdef-y += edd.h
unifdef-y += elfcore.h
unifdef-y += errno.h
unifdef-y += errqueue.h
@@ -306,6 +307,7 @@ unifdef-y += rtc.h
unifdef-y += rtnetlink.h
unifdef-y += scc.h
unifdef-y += sched.h
unifdef-y += screen_info.h
unifdef-y += sdla.h
unifdef-y += selinux_netlink.h
unifdef-y += sem.h
@@ -341,6 +343,9 @@ unifdef-y += user.h
unifdef-y += utsname.h
unifdef-y += videodev2.h
unifdef-y += videodev.h
unifdef-y += virtio_config.h
unifdef-y += virtio_blk.h
unifdef-y += virtio_net.h
unifdef-y += wait.h
unifdef-y += wanrouter.h
unifdef-y += watchdog.h
include/linux/apm_bios.h
+15 -15
View File
@@ -16,29 +16,29 @@
* General Public License for more details.
*/
typedef unsigned short apm_event_t;
typedef unsigned short apm_eventinfo_t;
#include <linux/types.h>
struct apm_bios_info {
__u16 version;
__u16 cseg;
__u32 offset;
__u16 cseg_16;
__u16 dseg;
__u16 flags;
__u16 cseg_len;
__u16 cseg_16_len;
__u16 dseg_len;
};
#ifdef __KERNEL__
#include <linux/types.h>
typedef unsigned short apm_event_t;
typedef unsigned short apm_eventinfo_t;
#define APM_CS (GDT_ENTRY_APMBIOS_BASE * 8)
#define APM_CS_16 (APM_CS + 8)
#define APM_DS (APM_CS_16 + 8)
struct apm_bios_info {
u16 version;
u16 cseg;
u32 offset;
u16 cseg_16;
u16 dseg;
u16 flags;
u16 cseg_len;
u16 cseg_16_len;
u16 dseg_len;
};
/* Results of APM Installation Check */
#define APM_16_BIT_SUPPORT 0x0001
#define APM_32_BIT_SUPPORT 0x0002
include/linux/edd.h
+69 -68
View File
@@ -67,113 +67,113 @@
#define EDD_INFO_USE_INT13_FN50 (1 << 7)
struct edd_device_params {
u16 length;
u16 info_flags;
u32 num_default_cylinders;
u32 num_default_heads;
u32 sectors_per_track;
u64 number_of_sectors;
u16 bytes_per_sector;
u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
u16 key; /* = 0xBEDD */
u8 device_path_info_length; /* = 44 */
u8 reserved2;
u16 reserved3;
u8 host_bus_type[4];
u8 interface_type[8];
__u16 length;
__u16 info_flags;
__u32 num_default_cylinders;
__u32 num_default_heads;
__u32 sectors_per_track;
__u64 number_of_sectors;
__u16 bytes_per_sector;
__u32 dpte_ptr; /* 0xFFFFFFFF for our purposes */
__u16 key; /* = 0xBEDD */
__u8 device_path_info_length; /* = 44 */
__u8 reserved2;
__u16 reserved3;
__u8 host_bus_type[4];
__u8 interface_type[8];
union {
struct {
u16 base_address;
u16 reserved1;
u32 reserved2;
__u16 base_address;
__u16 reserved1;
__u32 reserved2;
} __attribute__ ((packed)) isa;
struct {
u8 bus;
u8 slot;
u8 function;
u8 channel;
u32 reserved;
__u8 bus;
__u8 slot;
__u8 function;
__u8 channel;
__u32 reserved;
} __attribute__ ((packed)) pci;
/* pcix is same as pci */
struct {
u64 reserved;
__u64 reserved;
} __attribute__ ((packed)) ibnd;
struct {
u64 reserved;
__u64 reserved;
} __attribute__ ((packed)) xprs;
struct {
u64 reserved;
__u64 reserved;
} __attribute__ ((packed)) htpt;
struct {
u64 reserved;
__u64 reserved;
} __attribute__ ((packed)) unknown;
} interface_path;
union {
struct {
u8 device;
u8 reserved1;
u16 reserved2;
u32 reserved3;
u64 reserved4;
__u8 device;
__u8 reserved1;
__u16 reserved2;
__u32 reserved3;
__u64 reserved4;
} __attribute__ ((packed)) ata;
struct {
u8 device;
u8 lun;
u8 reserved1;
u8 reserved2;
u32 reserved3;
u64 reserved4;
__u8 device;
__u8 lun;
__u8 reserved1;
__u8 reserved2;
__u32 reserved3;
__u64 reserved4;
} __attribute__ ((packed)) atapi;
struct {
u16 id;
u64 lun;
u16 reserved1;
u32 reserved2;
__u16 id;
__u64 lun;
__u16 reserved1;
__u32 reserved2;
} __attribute__ ((packed)) scsi;
struct {
u64 serial_number;
u64 reserved;
__u64 serial_number;
__u64 reserved;
} __attribute__ ((packed)) usb;
struct {
u64 eui;
u64 reserved;
__u64 eui;
__u64 reserved;
} __attribute__ ((packed)) i1394;
struct {
u64 wwid;
u64 lun;
__u64 wwid;
__u64 lun;
} __attribute__ ((packed)) fibre;
struct {
u64 identity_tag;
u64 reserved;
__u64 identity_tag;
__u64 reserved;
} __attribute__ ((packed)) i2o;
struct {
u32 array_number;
u32 reserved1;
u64 reserved2;
__u32 array_number;
__u32 reserved1;
__u64 reserved2;
} __attribute__ ((packed)) raid;
struct {
u8 device;
u8 reserved1;
u16 reserved2;
u32 reserved3;
u64 reserved4;
__u8 device;
__u8 reserved1;
__u16 reserved2;
__u32 reserved3;
__u64 reserved4;
} __attribute__ ((packed)) sata;
struct {
u64 reserved1;
u64 reserved2;
__u64 reserved1;
__u64 reserved2;
} __attribute__ ((packed)) unknown;
} device_path;
u8 reserved4;
u8 checksum;
__u8 reserved4;
__u8 checksum;
} __attribute__ ((packed));
struct edd_info {
u8 device;
u8 version;
u16 interface_support;
u16 legacy_max_cylinder;
u8 legacy_max_head;
u8 legacy_sectors_per_track;
__u8 device;
__u8 version;
__u16 interface_support;
__u16 legacy_max_cylinder;
__u8 legacy_max_head;
__u8 legacy_sectors_per_track;
struct edd_device_params params;
} __attribute__ ((packed));
@@ -184,8 +184,9 @@ struct edd {
unsigned char edd_info_nr;
};
#ifdef __KERNEL__
extern struct edd edd;
#endif /* __KERNEL__ */
#endif /*!__ASSEMBLY__ */
#endif /* _LINUX_EDD_H */
include/linux/lguest.h
+12 -68
View File
@@ -1,76 +1,16 @@
/* Things the lguest guest needs to know. Note: like all lguest interfaces,
* this is subject to wild and random change between versions. */
#ifndef _ASM_LGUEST_H
#define _ASM_LGUEST_H
#ifndef _LINUX_LGUEST_H
#define _LINUX_LGUEST_H
#ifndef __ASSEMBLY__
#include <linux/time.h>
#include <asm/irq.h>
#define LHCALL_FLUSH_ASYNC 0
#define LHCALL_LGUEST_INIT 1
#define LHCALL_CRASH 2
#define LHCALL_LOAD_GDT 3
#define LHCALL_NEW_PGTABLE 4
#define LHCALL_FLUSH_TLB 5
#define LHCALL_LOAD_IDT_ENTRY 6
#define LHCALL_SET_STACK 7
#define LHCALL_TS 8
#define LHCALL_SET_CLOCKEVENT 9
#define LHCALL_HALT 10
#define LHCALL_BIND_DMA 12
#define LHCALL_SEND_DMA 13
#define LHCALL_SET_PTE 14
#define LHCALL_SET_PMD 15
#define LHCALL_LOAD_TLS 16
#include <asm/lguest_hcall.h>
#define LG_CLOCK_MIN_DELTA 100UL
#define LG_CLOCK_MAX_DELTA ULONG_MAX
/*G:031 First, how does our Guest contact the Host to ask for privileged
* operations? There are two ways: the direct way is to make a "hypercall",
* to make requests of the Host Itself.
*
* Our hypercall mechanism uses the highest unused trap code (traps 32 and
* above are used by real hardware interrupts). Seventeen hypercalls are
* available: the hypercall number is put in the %eax register, and the
* arguments (when required) are placed in %edx, %ebx and %ecx. If a return
* value makes sense, it's returned in %eax.
*
* Grossly invalid calls result in Sudden Death at the hands of the vengeful
* Host, rather than returning failure. This reflects Winston Churchill's
* definition of a gentleman: "someone who is only rude intentionally". */
#define LGUEST_TRAP_ENTRY 0x1F
static inline unsigned long
hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3)
{
/* "int" is the Intel instruction to trigger a trap. */
asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY)
/* The call is in %eax (aka "a"), and can be replaced */
: "=a"(call)
/* The other arguments are in %eax, %edx, %ebx & %ecx */
: "a"(call), "d"(arg1), "b"(arg2), "c"(arg3)
/* "memory" means this might write somewhere in memory.
* This isn't true for all calls, but it's safe to tell
* gcc that it might happen so it doesn't get clever. */
: "memory");
return call;
}
/*:*/
void async_hcall(unsigned long call,
unsigned long arg1, unsigned long arg2, unsigned long arg3);
/* Can't use our min() macro here: needs to be a constant */
#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
#define LHCALL_RING_SIZE 64
struct hcall_ring
{
u32 eax, edx, ebx, ecx;
};
/*G:032 The second method of communicating with the Host is to via "struct
* lguest_data". The Guest's very first hypercall is to tell the Host where
* this is, and then the Guest and Host both publish information in it. :*/
@@ -97,20 +37,24 @@ struct lguest_data
/* 0xFF == done (set by Host), 0 == pending (set by Guest). */
u8 hcall_status[LHCALL_RING_SIZE];
/* The actual registers for the hypercalls. */
struct hcall_ring hcalls[LHCALL_RING_SIZE];
struct hcall_args hcalls[LHCALL_RING_SIZE];
/* Fields initialized by the Host at boot: */
/* Memory not to try to access */
unsigned long reserve_mem;
/* ID of this Guest (used by network driver to set ethernet address) */
u16 guestid;
/* KHz for the TSC clock. */
u32 tsc_khz;
/* Page where the top-level pagetable is */
unsigned long pgdir;
/* Fields initialized by the Guest at boot: */
/* Instruction range to suppress interrupts even if enabled */
unsigned long noirq_start, noirq_end;
/* Address above which page tables are all identical. */
unsigned long kernel_address;
/* The vector to try to use for system calls (0x40 or 0x80). */
unsigned int syscall_vec;
};
extern struct lguest_data lguest_data;
#endif /* __ASSEMBLY__ */
#endif /* _ASM_LGUEST_H */
#endif /* _LINUX_LGUEST_H */
include/linux/lguest_bus.h
-51
View File
@@ -1,51 +0,0 @@
#ifndef _ASM_LGUEST_DEVICE_H
#define _ASM_LGUEST_DEVICE_H
/* Everything you need to know about lguest devices. */
#include <linux/device.h>
#include <linux/lguest.h>
#include <linux/lguest_launcher.h>
struct lguest_device {
/* Unique busid, and index into lguest_page->devices[] */
unsigned int index;
struct device dev;
/* Driver can hang data off here. */
void *private;
};
/*D:380 Since interrupt numbers are arbitrary, we use a convention: each device
* can use the interrupt number corresponding to its index. The +1 is because
* interrupt 0 is not usable (it's actually the timer interrupt). */
static inline int lgdev_irq(const struct lguest_device *dev)
{
return dev->index + 1;
}
/*:*/
/* dma args must not be vmalloced! */
void lguest_send_dma(unsigned long key, struct lguest_dma *dma);
int lguest_bind_dma(unsigned long key, struct lguest_dma *dmas,
unsigned int num, u8 irq);
void lguest_unbind_dma(unsigned long key, struct lguest_dma *dmas);
/* Map the virtual device space */
void *lguest_map(unsigned long phys_addr, unsigned long pages);
void lguest_unmap(void *);
struct lguest_driver {
const char *name;
struct module *owner;
u16 device_type;
int (*probe)(struct lguest_device *dev);
void (*remove)(struct lguest_device *dev);
struct device_driver drv;
};
extern int register_lguest_driver(struct lguest_driver *drv);
extern void unregister_lguest_driver(struct lguest_driver *drv);
extern struct lguest_device_desc *lguest_devices; /* Just past max_pfn */
#endif /* _ASM_LGUEST_DEVICE_H */
include/linux/lguest_launcher.h
+22 -90
View File
@@ -1,6 +1,7 @@
#ifndef _ASM_LGUEST_USER
#define _ASM_LGUEST_USER
/* Everything the "lguest" userspace program needs to know. */
#include <linux/types.h>
/* They can register up to 32 arrays of lguest_dma. */
#define LGUEST_MAX_DMA 32
/* At most we can dma 16 lguest_dma in one op. */
@@ -9,66 +10,6 @@
/* How many devices? Assume each one wants up to two dma arrays per device. */
#define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2)
/*D:200
* Lguest I/O
*
* The lguest I/O mechanism is the only way Guests can talk to devices. There
* are two hypercalls involved: SEND_DMA for output and BIND_DMA for input. In
* each case, "struct lguest_dma" describes the buffer: this contains 16
* addr/len pairs, and if there are fewer buffer elements the len array is
* terminated with a 0.
*
* I/O is organized by keys: BIND_DMA attaches buffers to a particular key, and
* SEND_DMA transfers to buffers bound to particular key. By convention, keys
* correspond to a physical address within the device's page. This means that
* devices will never accidentally end up with the same keys, and allows the
* Host use The Futex Trick (as we'll see later in our journey).
*
* SEND_DMA simply indicates a key to send to, and the physical address of the
* "struct lguest_dma" to send. The Host will write the number of bytes
* transferred into the "struct lguest_dma"'s used_len member.
*
* BIND_DMA indicates a key to bind to, a pointer to an array of "struct
* lguest_dma"s ready for receiving, the size of that array, and an interrupt
* to trigger when data is received. The Host will only allow transfers into
* buffers with a used_len of zero: it then sets used_len to the number of
* bytes transferred and triggers the interrupt for the Guest to process the
* new input. */
struct lguest_dma
{
/* 0 if free to be used, filled by the Host. */
u32 used_len;
unsigned long addr[LGUEST_MAX_DMA_SECTIONS];
u16 len[LGUEST_MAX_DMA_SECTIONS];
};
/*:*/
/*D:460 This is the layout of a block device memory page. The Launcher sets up
* the num_sectors initially to tell the Guest the size of the disk. The Guest
* puts the type, sector and length of the request in the first three fields,
* then DMAs to the Host. The Host processes the request, sets up the result,
* then DMAs back to the Guest. */
struct lguest_block_page
{
/* 0 is a read, 1 is a write. */
int type;
u32 sector; /* Offset in device = sector * 512. */
u32 bytes; /* Length expected to be read/written in bytes */
/* 0 = pending, 1 = done, 2 = done, error */
int result;
u32 num_sectors; /* Disk length = num_sectors * 512 */
};
/*D:520 The network device is basically a memory page where all the Guests on
* the network publish their MAC (ethernet) addresses: it's an array of "struct
* lguest_net": */
struct lguest_net
{
/* Simply the mac address (with multicast bit meaning promisc). */
unsigned char mac[6];
};
/*:*/
/* Where the Host expects the Guest to SEND_DMA console output to. */
#define LGUEST_CONSOLE_DMA_KEY 0
@@ -81,38 +22,29 @@ struct lguest_net
* complex burden for the Host and suboptimal for the Guest, so we have our own
* "lguest" bus and simple drivers.
*
* Devices are described by an array of LGUEST_MAX_DEVICES of these structs,
* placed by the Launcher just above the top of physical memory:
* Devices are described by a simplified ID, a status byte, and some "config"
* bytes which describe this device's configuration. This is placed by the
* Launcher just above the top of physical memory:
*/
struct lguest_device_desc {
/* The device type: console, network, disk etc. */
u16 type;
#define LGUEST_DEVICE_T_CONSOLE 1
#define LGUEST_DEVICE_T_NET 2
#define LGUEST_DEVICE_T_BLOCK 3
/* The device type: console, network, disk etc. Type 0 terminates. */
__u8 type;
/* The number of bytes of the config array. */
__u8 config_len;
/* A status byte, written by the Guest. */
__u8 status;
__u8 config[0];
};
/* The specific features of this device: these depends on device type
* except for LGUEST_DEVICE_F_RANDOMNESS. */
u16 features;
#define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */
#define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */
/* This is how the Guest reports status of the device: the Host can set
* LGUEST_DEVICE_S_REMOVED to indicate removal, but the rest are only
* ever manipulated by the Guest, and only ever set. */
u16 status;
/* 256 and above are device specific. */
#define LGUEST_DEVICE_S_ACKNOWLEDGE 1 /* We have seen device. */
#define LGUEST_DEVICE_S_DRIVER 2 /* We have found a driver */
#define LGUEST_DEVICE_S_DRIVER_OK 4 /* Driver says OK! */
#define LGUEST_DEVICE_S_REMOVED 8 /* Device has gone away. */
#define LGUEST_DEVICE_S_REMOVED_ACK 16 /* Driver has been told. */
#define LGUEST_DEVICE_S_FAILED 128 /* Something actually failed */
/* Each device exists somewhere in Guest physical memory, over some
* number of pages. */
u16 num_pages;
u32 pfn;
/*D:135 This is how we expect the device configuration field for a virtqueue
* (type VIRTIO_CONFIG_F_VIRTQUEUE) to be laid out: */
struct lguest_vqconfig {
/* The number of entries in the virtio_ring */
__u16 num;
/* The interrupt we get when something happens. */
__u16 irq;
/* The page number of the virtio ring for this device. */
__u32 pfn;
};
/*:*/
@@ -120,7 +52,7 @@ struct lguest_device_desc {
enum lguest_req
{
LHREQ_INITIALIZE, /* + pfnlimit, pgdir, start, pageoffset */
LHREQ_GETDMA, /* + addr (returns &lguest_dma, irq in ->used_len) */
LHREQ_GETDMA, /* No longer used */
LHREQ_IRQ, /* + irq */
LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
};
include/linux/mod_devicetable.h
+6
View File
@@ -361,4 +361,10 @@ struct ssb_device_id {
#define SSB_ANY_ID 0xFFFF
#define SSB_ANY_REV 0xFF
struct virtio_device_id {
__u32 device;
__u32 vendor;
};
#define VIRTIO_DEV_ANY_ID 0xffffffff
#endif /* LINUX_MOD_DEVICETABLE_H */
include/linux/screen_info.h
+46 -35
View File
@@ -8,45 +8,43 @@
*/
struct screen_info {
u8 orig_x; /* 0x00 */
u8 orig_y; /* 0x01 */
u16 ext_mem_k; /* 0x02 */
u16 orig_video_page; /* 0x04 */
u8 orig_video_mode; /* 0x06 */
u8 orig_video_cols; /* 0x07 */
u16 unused2; /* 0x08 */
u16 orig_video_ega_bx; /* 0x0a */
u16 unused3; /* 0x0c */
u8 orig_video_lines; /* 0x0e */
u8 orig_video_isVGA; /* 0x0f */
u16 orig_video_points; /* 0x10 */
__u8 orig_x; /* 0x00 */
__u8 orig_y; /* 0x01 */
__u16 ext_mem_k; /* 0x02 */
__u16 orig_video_page; /* 0x04 */
__u8 orig_video_mode; /* 0x06 */
__u8 orig_video_cols; /* 0x07 */
__u16 unused2; /* 0x08 */
__u16 orig_video_ega_bx;/* 0x0a */
__u16 unused3; /* 0x0c */
__u8 orig_video_lines; /* 0x0e */
__u8 orig_video_isVGA; /* 0x0f */
__u16 orig_video_points;/* 0x10 */
/* VESA graphic mode -- linear frame buffer */
u16 lfb_width; /* 0x12 */
u16 lfb_height; /* 0x14 */
u16 lfb_depth; /* 0x16 */
u32 lfb_base; /* 0x18 */
u32 lfb_size; /* 0x1c */
u16 cl_magic, cl_offset; /* 0x20 */
u16 lfb_linelength; /* 0x24 */
u8 red_size; /* 0x26 */
u8 red_pos; /* 0x27 */
u8 green_size; /* 0x28 */
u8 green_pos; /* 0x29 */
u8 blue_size; /* 0x2a */
u8 blue_pos; /* 0x2b */
u8 rsvd_size; /* 0x2c */
u8 rsvd_pos; /* 0x2d */
u16 vesapm_seg; /* 0x2e */
u16 vesapm_off; /* 0x30 */
u16 pages; /* 0x32 */
u16 vesa_attributes; /* 0x34 */
u32 capabilities; /* 0x36 */
u8 _reserved[6]; /* 0x3a */
__u16 lfb_width; /* 0x12 */
__u16 lfb_height; /* 0x14 */
__u16 lfb_depth; /* 0x16 */
__u32 lfb_base; /* 0x18 */
__u32 lfb_size; /* 0x1c */
__u16 cl_magic, cl_offset; /* 0x20 */
__u16 lfb_linelength; /* 0x24 */
__u8 red_size; /* 0x26 */
__u8 red_pos; /* 0x27 */
__u8 green_size; /* 0x28 */
__u8 green_pos; /* 0x29 */
__u8 blue_size; /* 0x2a */
__u8 blue_pos; /* 0x2b */
__u8 rsvd_size; /* 0x2c */
__u8 rsvd_pos; /* 0x2d */
__u16 vesapm_seg; /* 0x2e */
__u16 vesapm_off; /* 0x30 */
__u16 pages; /* 0x32 */
__u16 vesa_attributes; /* 0x34 */
__u32 capabilities; /* 0x36 */
__u8 _reserved[6]; /* 0x3a */
} __attribute__((packed));
extern struct screen_info screen_info;
#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
@@ -65,4 +63,17 @@ extern struct screen_info screen_info;
#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
#ifdef __KERNEL__
extern struct screen_info screen_info;
#define ORIG_X (screen_info.orig_x)
#define ORIG_Y (screen_info.orig_y)
#define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
#define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
#define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
#define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
#define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
#endif /* __KERNEL__ */
#endif /* _SCREEN_INFO_H */
include/linux/virtio.h
+110
View File
@@ -0,0 +1,110 @@
#ifndef _LINUX_VIRTIO_H
#define _LINUX_VIRTIO_H
/* Everything a virtio driver needs to work with any particular virtio
* implementation. */
#include <linux/types.h>
#include <linux/scatterlist.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
/**
* virtqueue - a queue to register buffers for sending or receiving.
* @callback: the function to call when buffers are consumed (can be NULL).
* If this returns false, callbacks are suppressed until vq_ops->restart
* is called.
* @vdev: the virtio device this queue was created for.
* @vq_ops: the operations for this virtqueue (see below).
* @priv: a pointer for the virtqueue implementation to use.
*/
struct virtqueue
{
bool (*callback)(struct virtqueue *vq);
struct virtio_device *vdev;
struct virtqueue_ops *vq_ops;
void *priv;
};
/**
* virtqueue_ops - operations for virtqueue abstraction layer
* @add_buf: expose buffer to other end
* vq: the struct virtqueue we're talking about.
* sg: the description of the buffer(s).
* out_num: the number of sg readable by other side
* in_num: the number of sg which are writable (after readable ones)
* data: the token identifying the buffer.
* Returns 0 or an error.
* @kick: update after add_buf
* vq: the struct virtqueue
* After one or more add_buf calls, invoke this to kick the other side.
* @get_buf: get the next used buffer
* vq: the struct virtqueue we're talking about.
* len: the length written into the buffer
* Returns NULL or the "data" token handed to add_buf.
* @restart: restart callbacks after callback returned false.
* vq: the struct virtqueue we're talking about.
* This returns "false" (and doesn't re-enable) if there are pending
* buffers in the queue, to avoid a race.
* @shutdown: "unadd" all buffers.
* vq: the struct virtqueue we're talking about.
* Remove everything from the queue.
*
* Locking rules are straightforward: the driver is responsible for
* locking. No two operations may be invoked simultaneously.
*
* All operations can be called in any context.
*/
struct virtqueue_ops {
int (*add_buf)(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data);
void (*kick)(struct virtqueue *vq);
void *(*get_buf)(struct virtqueue *vq, unsigned int *len);
bool (*restart)(struct virtqueue *vq);
void (*shutdown)(struct virtqueue *vq);
};
/**
* virtio_device - representation of a device using virtio
* @index: unique position on the virtio bus
* @dev: underlying device.
* @id: the device type identification (used to match it with a driver).
* @config: the configuration ops for this device.
* @priv: private pointer for the driver's use.
*/
struct virtio_device
{
int index;
struct device dev;
struct virtio_device_id id;
struct virtio_config_ops *config;
void *priv;
};
int register_virtio_device(struct virtio_device *dev);
void unregister_virtio_device(struct virtio_device *dev);
/**
* virtio_driver - operations for a virtio I/O driver
* @driver: underlying device driver (populate name and owner).
* @id_table: the ids serviced by this driver.
* @probe: the function to call when a device is found. Returns a token for
* remove, or PTR_ERR().
* @remove: the function when a device is removed.
*/
struct virtio_driver {
struct device_driver driver;
const struct virtio_device_id *id_table;
int (*probe)(struct virtio_device *dev);
void (*remove)(struct virtio_device *dev);
};
int register_virtio_driver(struct virtio_driver *drv);
void unregister_virtio_driver(struct virtio_driver *drv);
#endif /* _LINUX_VIRTIO_H */
include/linux/virtio_blk.h
+51
View File
@@ -0,0 +1,51 @@
#ifndef _LINUX_VIRTIO_BLK_H
#define _LINUX_VIRTIO_BLK_H
#include <linux/virtio_config.h>
/* The ID for virtio_block */
#define VIRTIO_ID_BLOCK 2
/* Feature bits */
#define VIRTIO_CONFIG_BLK_F 0x40
#define VIRTIO_BLK_F_BARRIER 1 /* Does host support barriers? */
/* The capacity (in 512-byte sectors). */
#define VIRTIO_CONFIG_BLK_F_CAPACITY 0x41
/* The maximum segment size. */
#define VIRTIO_CONFIG_BLK_F_SIZE_MAX 0x42
/* The maximum number of segments. */
#define VIRTIO_CONFIG_BLK_F_SEG_MAX 0x43
/* These two define direction. */
#define VIRTIO_BLK_T_IN 0
#define VIRTIO_BLK_T_OUT 1
/* This bit says it's a scsi command, not an actual read or write. */
#define VIRTIO_BLK_T_SCSI_CMD 2
/* Barrier before this op. */
#define VIRTIO_BLK_T_BARRIER 0x80000000
/* This is the first element of the read scatter-gather list. */
struct virtio_blk_outhdr
{
/* VIRTIO_BLK_T* */
__u32 type;
/* io priority. */
__u32 ioprio;
/* Sector (ie. 512 byte offset) */
__u64 sector;
/* Where to put reply. */
__u64 id;
};
#define VIRTIO_BLK_S_OK 0
#define VIRTIO_BLK_S_IOERR 1
#define VIRTIO_BLK_S_UNSUPP 2
/* This is the first element of the write scatter-gather list */
struct virtio_blk_inhdr
{
unsigned char status;
};
#endif /* _LINUX_VIRTIO_BLK_H */
include/linux/virtio_config.h
+111
View File
@@ -0,0 +1,111 @@
#ifndef _LINUX_VIRTIO_CONFIG_H
#define _LINUX_VIRTIO_CONFIG_H
/* Virtio devices use a standardized configuration space to define their
* features and pass configuration information, but each implementation can
* store and access that space differently. */
#include <linux/types.h>
/* Status byte for guest to report progress, and synchronize config. */
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
/* We have found a driver for the device. */
#define VIRTIO_CONFIG_S_DRIVER 2
/* Driver has used its parts of the config, and is happy */
#define VIRTIO_CONFIG_S_DRIVER_OK 4
/* We've given up on this device. */
#define VIRTIO_CONFIG_S_FAILED 0x80
/* Feature byte (actually 7 bits availabe): */
/* Requirements/features of the virtio implementation. */
#define VIRTIO_CONFIG_F_VIRTIO 1
/* Requirements/features of the virtqueue (may have more than one). */
#define VIRTIO_CONFIG_F_VIRTQUEUE 2
#ifdef __KERNEL__
struct virtio_device;
/**
* virtio_config_ops - operations for configuring a virtio device
* @find: search for the next configuration field of the given type.
* vdev: the virtio_device
* type: the feature type
* len: the (returned) length of the field if found.
* Returns a token if found, or NULL. Never returnes the same field twice
* (ie. it's used up).
* @get: read the value of a configuration field after find().
* vdev: the virtio_device
* token: the token returned from find().
* buf: the buffer to write the field value into.
* len: the length of the buffer (given by find()).
* Note that contents are conventionally little-endian.
* @set: write the value of a configuration field after find().
* vdev: the virtio_device
* token: the token returned from find().
* buf: the buffer to read the field value from.
* len: the length of the buffer (given by find()).
* Note that contents are conventionally little-endian.
* @get_status: read the status byte
* vdev: the virtio_device
* Returns the status byte
* @set_status: write the status byte
* vdev: the virtio_device
* status: the new status byte
* @find_vq: find the first VIRTIO_CONFIG_F_VIRTQUEUE and create a virtqueue.
* vdev: the virtio_device
* callback: the virqtueue callback
* Returns the new virtqueue or ERR_PTR().
* @del_vq: free a virtqueue found by find_vq().
*/
struct virtio_config_ops
{
void *(*find)(struct virtio_device *vdev, u8 type, unsigned *len);
void (*get)(struct virtio_device *vdev, void *token,
void *buf, unsigned len);
void (*set)(struct virtio_device *vdev, void *token,
const void *buf, unsigned len);
u8 (*get_status)(struct virtio_device *vdev);
void (*set_status)(struct virtio_device *vdev, u8 status);
struct virtqueue *(*find_vq)(struct virtio_device *vdev,
bool (*callback)(struct virtqueue *));
void (*del_vq)(struct virtqueue *vq);
};
/**
* virtio_config_val - get a single virtio config and mark it used.
* @config: the virtio config space
* @type: the type to search for.
* @val: a pointer to the value to fill in.
*
* Once used, the config type is marked with VIRTIO_CONFIG_F_USED so it can't
* be found again. This version does endian conversion. */
#define virtio_config_val(vdev, type, v) ({ \
int _err = __virtio_config_val((vdev),(type),(v),sizeof(*(v))); \
\
BUILD_BUG_ON(sizeof(*(v)) != 1 && sizeof(*(v)) != 2 \
&& sizeof(*(v)) != 4 && sizeof(*(v)) != 8); \
if (!_err) { \
switch (sizeof(*(v))) { \
case 2: le16_to_cpus((__u16 *) v); break; \
case 4: le32_to_cpus((__u32 *) v); break; \
case 8: le64_to_cpus((__u64 *) v); break; \
} \
} \
_err; \
})
int __virtio_config_val(struct virtio_device *dev,
u8 type, void *val, size_t size);
/**
* virtio_use_bit - helper to use a feature bit in a bitfield value.
* @dev: the virtio device
* @token: the token as returned from vdev->config->find().
* @len: the length of the field.
* @bitnum: the bit to test.
*
* If handed a NULL token, it returns false, otherwise returns bit status.
* If it's one, it sets the mirroring acknowledgement bit. */
int virtio_use_bit(struct virtio_device *vdev,
void *token, unsigned int len, unsigned int bitnum);
#endif /* __KERNEL__ */
#endif /* _LINUX_VIRTIO_CONFIG_H */
include/linux/virtio_console.h
+12
View File
@@ -0,0 +1,12 @@
#ifndef _LINUX_VIRTIO_CONSOLE_H
#define _LINUX_VIRTIO_CONSOLE_H
#include <linux/virtio_config.h>
/* The ID for virtio console */
#define VIRTIO_ID_CONSOLE 3
#ifdef __KERNEL__
int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
#endif /* __KERNEL__ */
#endif /* _LINUX_VIRTIO_CONSOLE_H */
include/linux/virtio_net.h
+36
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@@ -0,0 +1,36 @@
#ifndef _LINUX_VIRTIO_NET_H
#define _LINUX_VIRTIO_NET_H
#include <linux/virtio_config.h>
/* The ID for virtio_net */
#define VIRTIO_ID_NET 1
/* The bitmap of config for virtio net */
#define VIRTIO_CONFIG_NET_F 0x40
#define VIRTIO_NET_F_NO_CSUM 0
#define VIRTIO_NET_F_TSO4 1
#define VIRTIO_NET_F_UFO 2
#define VIRTIO_NET_F_TSO4_ECN 3
#define VIRTIO_NET_F_TSO6 4
/* The config defining mac address. */
#define VIRTIO_CONFIG_NET_MAC_F 0x41
/* This is the first element of the scatter-gather list. If you don't
* specify GSO or CSUM features, you can simply ignore the header. */
struct virtio_net_hdr
{
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
__u8 flags;
#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
/* FIXME: Do we need this? If they said they can handle ECN, do they care? */
#define VIRTIO_NET_HDR_GSO_TCPV4_ECN 2 // GSO frame, IPv4 TCP w/ ECN
#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
__u8 gso_type;
__u16 gso_size;
__u16 csum_start;
__u16 csum_offset;
};
#endif /* _LINUX_VIRTIO_NET_H */
include/linux/virtio_ring.h
+119
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#ifndef _LINUX_VIRTIO_RING_H
#define _LINUX_VIRTIO_RING_H
/* An interface for efficient virtio implementation, currently for use by KVM
* and lguest, but hopefully others soon. Do NOT change this since it will
* break existing servers and clients.
*
* This header is BSD licensed so anyone can use the definitions to implement
* compatible drivers/servers.
*
* Copyright Rusty Russell IBM Corporation 2007. */
#include <linux/types.h>
/* This marks a buffer as continuing via the next field. */
#define VRING_DESC_F_NEXT 1
/* This marks a buffer as write-only (otherwise read-only). */
#define VRING_DESC_F_WRITE 2
/* This means don't notify other side when buffer added. */
#define VRING_USED_F_NO_NOTIFY 1
/* This means don't interrupt guest when buffer consumed. */
#define VRING_AVAIL_F_NO_INTERRUPT 1
/* Virtio ring descriptors: 16 bytes. These can chain together via "next". */
struct vring_desc
{
/* Address (guest-physical). */
__u64 addr;
/* Length. */
__u32 len;
/* The flags as indicated above. */
__u16 flags;
/* We chain unused descriptors via this, too */
__u16 next;
};
struct vring_avail
{
__u16 flags;
__u16 idx;
__u16 ring[];
};
/* u32 is used here for ids for padding reasons. */
struct vring_used_elem
{
/* Index of start of used descriptor chain. */
__u32 id;
/* Total length of the descriptor chain which was used (written to) */
__u32 len;
};
struct vring_used
{
__u16 flags;
__u16 idx;
struct vring_used_elem ring[];
};
struct vring {
unsigned int num;
struct vring_desc *desc;
struct vring_avail *avail;
struct vring_used *used;
};
/* The standard layout for the ring is a continuous chunk of memory which looks
* like this. The used fields will be aligned to a "num+1" boundary.
*
* struct vring
* {
* // The actual descriptors (16 bytes each)
* struct vring_desc desc[num];
*
* // A ring of available descriptor heads with free-running index.
* __u16 avail_flags;
* __u16 avail_idx;
* __u16 available[num];
*
* // Padding so a correctly-chosen num value will cache-align used_idx.
* char pad[sizeof(struct vring_desc) - sizeof(avail_flags)];
*
* // A ring of used descriptor heads with free-running index.
* __u16 used_flags;
* __u16 used_idx;
* struct vring_used_elem used[num];
* };
*/
static inline void vring_init(struct vring *vr, unsigned int num, void *p)
{
vr->num = num;
vr->desc = p;
vr->avail = p + num*sizeof(struct vring);
vr->used = p + (num+1)*(sizeof(struct vring) + sizeof(__u16));
}
static inline unsigned vring_size(unsigned int num)
{
return (num + 1) * (sizeof(struct vring_desc) + sizeof(__u16))
+ sizeof(__u32) + num * sizeof(struct vring_used_elem);
}
#ifdef __KERNEL__
#include <linux/irqreturn.h>
struct virtio_device;
struct virtqueue;
struct virtqueue *vring_new_virtqueue(unsigned int num,
struct virtio_device *vdev,
void *pages,
void (*notify)(struct virtqueue *vq),
bool (*callback)(struct virtqueue *vq));
void vring_del_virtqueue(struct virtqueue *vq);
irqreturn_t vring_interrupt(int irq, void *_vq);
#endif /* __KERNEL__ */
#endif /* _LINUX_VIRTIO_RING_H */
include/video/Kbuild
+1
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@@ -1 +1,2 @@
unifdef-y += sisfb.h uvesafb.h
unifdef-y += edid.h
include/video/edid.h
+4 -5
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@@ -1,17 +1,16 @@
#ifndef __linux_video_edid_h__
#define __linux_video_edid_h__
#ifdef __KERNEL__
#if !defined(__KERNEL__) || defined(CONFIG_X86)
#ifdef CONFIG_X86
struct edid_info {
unsigned char dummy[128];
};
#ifdef __KERNEL__
extern struct edid_info edid_info;
#endif /* CONFIG_X86 */
#endif /* __KERNEL__ */
#endif
#endif /* __linux_video_edid_h__ */