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authorRusty Russell <rusty@rustcorp.com.au>2007-07-19 01:49:23 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:52 -0700
commitd7e28ffe6c74416b54345d6004fd0964c115b12c (patch)
tree844beb4f400d5400098538e0c1e5f12d20a9504a /include
parent07ad157f6e5d228be78acd5cea0291e5d0360398 (diff)
downloadop-kernel-dev-d7e28ffe6c74416b54345d6004fd0964c115b12c.zip
op-kernel-dev-d7e28ffe6c74416b54345d6004fd0964c115b12c.tar.gz
lguest: the host code
This is the code for the "lg.ko" module, which allows lguest guests to be launched. [akpm@linux-foundation.org: update for futex-new-private-futexes] [akpm@linux-foundation.org: build fix] [jmorris@namei.org: lguest: use hrtimers] [akpm@linux-foundation.org: x86_64 build fix] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-i386/tsc.h1
-rw-r--r--include/linux/lguest.h12
-rw-r--r--include/linux/lguest_launcher.h73
3 files changed, 80 insertions, 6 deletions
diff --git a/include/asm-i386/tsc.h b/include/asm-i386/tsc.h
index 62c091f..a4d8066 100644
--- a/include/asm-i386/tsc.h
+++ b/include/asm-i386/tsc.h
@@ -63,6 +63,7 @@ extern void tsc_init(void);
extern void mark_tsc_unstable(char *reason);
extern int unsynchronized_tsc(void);
extern void init_tsc_clocksource(void);
+int check_tsc_unstable(void);
/*
* Boot-time check whether the TSCs are synchronized across
diff --git a/include/linux/lguest.h b/include/linux/lguest.h
index f30c04f..500aace 100644
--- a/include/linux/lguest.h
+++ b/include/linux/lguest.h
@@ -3,11 +3,6 @@
#ifndef _ASM_LGUEST_H
#define _ASM_LGUEST_H
-/* These are randomly chosen numbers which indicate we're an lguest at boot */
-#define LGUEST_MAGIC_EBP 0x4C687970
-#define LGUEST_MAGIC_EDI 0x652D4D65
-#define LGUEST_MAGIC_ESI 0xFFFFFFFF
-
#ifndef __ASSEMBLY__
#include <asm/irq.h>
@@ -20,7 +15,7 @@
#define LHCALL_LOAD_IDT_ENTRY 6
#define LHCALL_SET_STACK 7
#define LHCALL_TS 8
-#define LHCALL_TIMER_READ 9
+#define LHCALL_SET_CLOCKEVENT 9
#define LHCALL_HALT 10
#define LHCALL_GET_WALLCLOCK 11
#define LHCALL_BIND_DMA 12
@@ -29,6 +24,9 @@
#define LHCALL_SET_PMD 15
#define LHCALL_LOAD_TLS 16
+#define LG_CLOCK_MIN_DELTA 100UL
+#define LG_CLOCK_MAX_DELTA ULONG_MAX
+
#define LGUEST_TRAP_ENTRY 0x1F
static inline unsigned long
@@ -75,6 +73,8 @@ struct lguest_data
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;
/* Fields initialized by the guest at boot: */
/* Instruction range to suppress interrupts even if enabled */
diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h
new file mode 100644
index 0000000..0ba414a
--- /dev/null
+++ b/include/linux/lguest_launcher.h
@@ -0,0 +1,73 @@
+#ifndef _ASM_LGUEST_USER
+#define _ASM_LGUEST_USER
+/* Everything the "lguest" userspace program needs to know. */
+/* 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. */
+#define LGUEST_MAX_DMA_SECTIONS 16
+
+/* How many devices? Assume each one wants up to two dma arrays per device. */
+#define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2)
+
+struct lguest_dma
+{
+ /* 0 if free to be used, filled by hypervisor. */
+ u32 used_len;
+ unsigned long addr[LGUEST_MAX_DMA_SECTIONS];
+ u16 len[LGUEST_MAX_DMA_SECTIONS];
+};
+
+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 */
+};
+
+/* There is a shared page of these. */
+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
+
+/* We have a page of these descriptors in the lguest_device page. */
+struct lguest_device_desc {
+ u16 type;
+#define LGUEST_DEVICE_T_CONSOLE 1
+#define LGUEST_DEVICE_T_NET 2
+#define LGUEST_DEVICE_T_BLOCK 3
+
+ u16 features;
+#define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */
+#define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */
+
+ 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 */
+
+ u16 num_pages;
+ u32 pfn;
+};
+
+/* Write command first word is a request. */
+enum lguest_req
+{
+ LHREQ_INITIALIZE, /* + pfnlimit, pgdir, start, pageoffset */
+ LHREQ_GETDMA, /* + addr (returns &lguest_dma, irq in ->used_len) */
+ LHREQ_IRQ, /* + irq */
+ LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
+};
+#endif /* _ASM_LGUEST_USER */
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