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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-03-25 13:47:20 -0400
committerAvi Kivity <avi@qumranet.com>2008-04-27 05:00:42 -0400
commitb0c632db637d68ad39d9f97f452ce176253f5f4e (patch)
tree770d68c17cbcabc1543d1e9125669130fcf4fee4 /include/asm-s390
parent8a88ac6183975c73c65b45f365f6f3b875c1348b (diff)
KVM: s390: arch backend for the kvm kernel module
This patch contains the port of Qumranet's kvm kernel module to IBM zSeries (aka s390x, mainframe) architecture. It uses the mainframe's virtualization instruction SIE to run virtual machines with up to 64 virtual CPUs each. This port is only usable on 64bit host kernels, and can only run 64bit guest kernels. However, running 31bit applications in guest userspace is possible. The following source files are introduced by this patch arch/s390/kvm/kvm-s390.c similar to arch/x86/kvm/x86.c, this implements all arch callbacks for kvm. __vcpu_run calls back into sie64a to enter the guest machine context arch/s390/kvm/sie64a.S assembler function sie64a, which enters guest context via SIE, and switches world before and after that include/asm-s390/kvm_host.h contains all vital data structures needed to run virtual machines on the mainframe include/asm-s390/kvm.h defines kvm_regs and friends for user access to guest register content arch/s390/kvm/gaccess.h functions similar to uaccess to access guest memory arch/s390/kvm/kvm-s390.h header file for kvm-s390 internals, extended by later patches Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/Kbuild1
-rw-r--r--include/asm-s390/kvm.h41
-rw-r--r--include/asm-s390/kvm_host.h127
-rw-r--r--include/asm-s390/kvm_para.h30
4 files changed, 198 insertions, 1 deletions
diff --git a/include/asm-s390/Kbuild b/include/asm-s390/Kbuild
index e92b429d2be1..13c9805349f1 100644
--- a/include/asm-s390/Kbuild
+++ b/include/asm-s390/Kbuild
@@ -7,6 +7,7 @@ header-y += tape390.h
7header-y += ucontext.h 7header-y += ucontext.h
8header-y += vtoc.h 8header-y += vtoc.h
9header-y += zcrypt.h 9header-y += zcrypt.h
10header-y += kvm.h
10 11
11unifdef-y += cmb.h 12unifdef-y += cmb.h
12unifdef-y += debug.h 13unifdef-y += debug.h
diff --git a/include/asm-s390/kvm.h b/include/asm-s390/kvm.h
index 573f2a351386..d74002f95794 100644
--- a/include/asm-s390/kvm.h
+++ b/include/asm-s390/kvm.h
@@ -1,6 +1,45 @@
1#ifndef __LINUX_KVM_S390_H 1#ifndef __LINUX_KVM_S390_H
2#define __LINUX_KVM_S390_H 2#define __LINUX_KVM_S390_H
3 3
4/* s390 does not support KVM */ 4/*
5 * asm-s390/kvm.h - KVM s390 specific structures and definitions
6 *
7 * Copyright IBM Corp. 2008
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License (version 2 only)
11 * as published by the Free Software Foundation.
12 *
13 * Author(s): Carsten Otte <cotte@de.ibm.com>
14 * Christian Borntraeger <borntraeger@de.ibm.com>
15 */
16#include <asm/types.h>
17
18/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
19struct kvm_pic_state {
20 /* no PIC for s390 */
21};
22
23struct kvm_ioapic_state {
24 /* no IOAPIC for s390 */
25};
26
27/* for KVM_GET_REGS and KVM_SET_REGS */
28struct kvm_regs {
29 /* general purpose regs for s390 */
30 __u64 gprs[16];
31};
32
33/* for KVM_GET_SREGS and KVM_SET_SREGS */
34struct kvm_sregs {
35 __u32 acrs[16];
36 __u64 crs[16];
37};
38
39/* for KVM_GET_FPU and KVM_SET_FPU */
40struct kvm_fpu {
41 __u32 fpc;
42 __u64 fprs[16];
43};
5 44
6#endif 45#endif
diff --git a/include/asm-s390/kvm_host.h b/include/asm-s390/kvm_host.h
new file mode 100644
index 000000000000..c9d653333106
--- /dev/null
+++ b/include/asm-s390/kvm_host.h
@@ -0,0 +1,127 @@
1/*
2 * asm-s390/kvm_host.h - definition for kernel virtual machines on s390
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 */
12
13
14#ifndef ASM_KVM_HOST_H
15#define ASM_KVM_HOST_H
16#include <linux/kvm_host.h>
17#include <asm/debug.h>
18
19#define KVM_MAX_VCPUS 64
20#define KVM_MEMORY_SLOTS 32
21/* memory slots that does not exposed to userspace */
22#define KVM_PRIVATE_MEM_SLOTS 4
23
24struct kvm_guest_debug {
25};
26
27struct sca_entry {
28 atomic_t scn;
29 __u64 reserved;
30 __u64 sda;
31 __u64 reserved2[2];
32} __attribute__((packed));
33
34
35struct sca_block {
36 __u64 ipte_control;
37 __u64 reserved[5];
38 __u64 mcn;
39 __u64 reserved2;
40 struct sca_entry cpu[64];
41} __attribute__((packed));
42
43#define KVM_PAGES_PER_HPAGE 256
44
45#define CPUSTAT_HOST 0x80000000
46#define CPUSTAT_WAIT 0x10000000
47#define CPUSTAT_ECALL_PEND 0x08000000
48#define CPUSTAT_STOP_INT 0x04000000
49#define CPUSTAT_IO_INT 0x02000000
50#define CPUSTAT_EXT_INT 0x01000000
51#define CPUSTAT_RUNNING 0x00800000
52#define CPUSTAT_RETAINED 0x00400000
53#define CPUSTAT_TIMING_SUB 0x00020000
54#define CPUSTAT_SIE_SUB 0x00010000
55#define CPUSTAT_RRF 0x00008000
56#define CPUSTAT_SLSV 0x00004000
57#define CPUSTAT_SLSR 0x00002000
58#define CPUSTAT_ZARCH 0x00000800
59#define CPUSTAT_MCDS 0x00000100
60#define CPUSTAT_SM 0x00000080
61#define CPUSTAT_G 0x00000008
62#define CPUSTAT_J 0x00000002
63#define CPUSTAT_P 0x00000001
64
65struct sie_block {
66 atomic_t cpuflags; /* 0x0000 */
67 __u32 prefix; /* 0x0004 */
68 __u8 reserved8[32]; /* 0x0008 */
69 __u64 cputm; /* 0x0028 */
70 __u64 ckc; /* 0x0030 */
71 __u64 epoch; /* 0x0038 */
72 __u8 reserved40[4]; /* 0x0040 */
73 __u16 lctl; /* 0x0044 */
74 __s16 icpua; /* 0x0046 */
75 __u32 ictl; /* 0x0048 */
76 __u32 eca; /* 0x004c */
77 __u8 icptcode; /* 0x0050 */
78 __u8 reserved51; /* 0x0051 */
79 __u16 ihcpu; /* 0x0052 */
80 __u8 reserved54[2]; /* 0x0054 */
81 __u16 ipa; /* 0x0056 */
82 __u32 ipb; /* 0x0058 */
83 __u32 scaoh; /* 0x005c */
84 __u8 reserved60; /* 0x0060 */
85 __u8 ecb; /* 0x0061 */
86 __u8 reserved62[2]; /* 0x0062 */
87 __u32 scaol; /* 0x0064 */
88 __u8 reserved68[4]; /* 0x0068 */
89 __u32 todpr; /* 0x006c */
90 __u8 reserved70[16]; /* 0x0070 */
91 __u64 gmsor; /* 0x0080 */
92 __u64 gmslm; /* 0x0088 */
93 psw_t gpsw; /* 0x0090 */
94 __u64 gg14; /* 0x00a0 */
95 __u64 gg15; /* 0x00a8 */
96 __u8 reservedb0[80]; /* 0x00b0 */
97 __u64 gcr[16]; /* 0x0100 */
98 __u64 gbea; /* 0x0180 */
99 __u8 reserved188[120]; /* 0x0188 */
100} __attribute__((packed));
101
102struct kvm_vcpu_stat {
103 u32 exit_userspace;
104};
105
106struct kvm_vcpu_arch {
107 struct sie_block *sie_block;
108 unsigned long guest_gprs[16];
109 s390_fp_regs host_fpregs;
110 unsigned int host_acrs[NUM_ACRS];
111 s390_fp_regs guest_fpregs;
112 unsigned int guest_acrs[NUM_ACRS];
113};
114
115struct kvm_vm_stat {
116 u32 remote_tlb_flush;
117};
118
119struct kvm_arch{
120 unsigned long guest_origin;
121 unsigned long guest_memsize;
122 struct sca_block *sca;
123 debug_info_t *dbf;
124};
125
126extern int sie64a(struct sie_block *, __u64 *);
127#endif
diff --git a/include/asm-s390/kvm_para.h b/include/asm-s390/kvm_para.h
new file mode 100644
index 000000000000..e9bd3fbe878c
--- /dev/null
+++ b/include/asm-s390/kvm_para.h
@@ -0,0 +1,30 @@
1/*
2 * asm-s390/kvm_para.h - definition for paravirtual devices on s390
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
11 */
12
13#ifndef __S390_KVM_PARA_H
14#define __S390_KVM_PARA_H
15
16/*
17 * No hypercalls for KVM on s390
18 */
19
20static inline int kvm_para_available(void)
21{
22 return 0;
23}
24
25static inline unsigned int kvm_arch_para_features(void)
26{
27 return 0;
28}
29
30#endif /* __S390_KVM_PARA_H */
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