Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 2 | * Copyright (c) 2009, Microsoft Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Authors: |
| 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 19 | * Hank Janssen <hjanssen@microsoft.com> |
| 20 | * |
| 21 | */ |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 23 | |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 24 | #include <linux/kernel.h> |
| 25 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Bill Pemberton | b7c947f | 2009-07-29 17:00:13 -0400 | [diff] [blame] | 27 | #include <linux/vmalloc.h> |
Greg Kroah-Hartman | 46a9719 | 2011-10-04 12:29:52 -0700 | [diff] [blame] | 28 | #include <linux/hyperv.h> |
K. Y. Srinivasan | 83ba0c4 | 2012-07-24 16:11:58 -0700 | [diff] [blame] | 29 | #include <linux/version.h> |
Greg Kroah-Hartman | 407dd16 | 2011-10-11 08:36:44 -0600 | [diff] [blame] | 30 | #include <asm/hyperv.h> |
K. Y. Srinivasan | 0f2a661 | 2011-05-12 19:34:28 -0700 | [diff] [blame] | 31 | #include "hyperv_vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 32 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 33 | /* The one and only */ |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 34 | struct hv_context hv_context = { |
| 35 | .synic_initialized = false, |
| 36 | .hypercall_page = NULL, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 37 | }; |
| 38 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 39 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 40 | * query_hypervisor_info - Get version info of the windows hypervisor |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 41 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 42 | static int query_hypervisor_info(void) |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 43 | { |
| 44 | unsigned int eax; |
| 45 | unsigned int ebx; |
| 46 | unsigned int ecx; |
| 47 | unsigned int edx; |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 48 | unsigned int max_leaf; |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 49 | unsigned int op; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 50 | |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 51 | /* |
| 52 | * Its assumed that this is called after confirming that Viridian |
| 53 | * is present. Query id and revision. |
| 54 | */ |
| 55 | eax = 0; |
| 56 | ebx = 0; |
| 57 | ecx = 0; |
| 58 | edx = 0; |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 59 | op = HVCPUID_VENDOR_MAXFUNCTION; |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 60 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 61 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 62 | max_leaf = eax; |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 63 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 64 | if (max_leaf >= HVCPUID_VERSION) { |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 65 | eax = 0; |
| 66 | ebx = 0; |
| 67 | ecx = 0; |
| 68 | edx = 0; |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 69 | op = HVCPUID_VERSION; |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 70 | cpuid(op, &eax, &ebx, &ecx, &edx); |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 71 | pr_info("Hyper-V Host OS Build:%d-%d.%d-%d-%d.%d\n", |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 72 | eax, |
| 73 | ebx >> 16, |
| 74 | ebx & 0xFFFF, |
| 75 | ecx, |
| 76 | edx >> 24, |
| 77 | edx & 0xFFFFFF); |
| 78 | } |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 79 | return max_leaf; |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 80 | } |
| 81 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 82 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 83 | * do_hypercall- Invoke the specified hypercall |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 84 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 85 | static u64 do_hypercall(u64 control, void *input, void *output) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 86 | { |
Greg Kroah-Hartman | 530cf20 | 2009-07-16 22:31:15 -0700 | [diff] [blame] | 87 | #ifdef CONFIG_X86_64 |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 88 | u64 hv_status = 0; |
| 89 | u64 input_address = (input) ? virt_to_phys(input) : 0; |
| 90 | u64 output_address = (output) ? virt_to_phys(output) : 0; |
K. Y. Srinivasan | dec317f | 2011-07-19 11:44:21 -0700 | [diff] [blame] | 91 | void *hypercall_page = hv_context.hypercall_page; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 92 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 93 | __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); |
| 94 | __asm__ __volatile__("call *%3" : "=a" (hv_status) : |
| 95 | "c" (control), "d" (input_address), |
| 96 | "m" (hypercall_page)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 97 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 98 | return hv_status; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 99 | |
| 100 | #else |
| 101 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 102 | u32 control_hi = control >> 32; |
| 103 | u32 control_lo = control & 0xFFFFFFFF; |
| 104 | u32 hv_status_hi = 1; |
| 105 | u32 hv_status_lo = 1; |
| 106 | u64 input_address = (input) ? virt_to_phys(input) : 0; |
| 107 | u32 input_address_hi = input_address >> 32; |
| 108 | u32 input_address_lo = input_address & 0xFFFFFFFF; |
| 109 | u64 output_address = (output) ? virt_to_phys(output) : 0; |
| 110 | u32 output_address_hi = output_address >> 32; |
| 111 | u32 output_address_lo = output_address & 0xFFFFFFFF; |
K. Y. Srinivasan | dec317f | 2011-07-19 11:44:21 -0700 | [diff] [blame] | 112 | void *hypercall_page = hv_context.hypercall_page; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 113 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 114 | __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), |
| 115 | "=a"(hv_status_lo) : "d" (control_hi), |
| 116 | "a" (control_lo), "b" (input_address_hi), |
| 117 | "c" (input_address_lo), "D"(output_address_hi), |
| 118 | "S"(output_address_lo), "m" (hypercall_page)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 119 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 120 | return hv_status_lo | ((u64)hv_status_hi << 32); |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 121 | #endif /* !x86_64 */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 124 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 125 | * hv_init - Main initialization routine. |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 126 | * |
| 127 | * This routine must be called before any other routines in here are called |
| 128 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 129 | int hv_init(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 130 | { |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 131 | int max_leaf; |
| 132 | union hv_x64_msr_hypercall_contents hypercall_msr; |
| 133 | void *virtaddr = NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 134 | |
K. Y. Srinivasan | 14c1bf8 | 2012-02-02 16:56:51 -0800 | [diff] [blame] | 135 | memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS); |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 136 | memset(hv_context.synic_message_page, 0, |
K. Y. Srinivasan | 14c1bf8 | 2012-02-02 16:56:51 -0800 | [diff] [blame] | 137 | sizeof(void *) * NR_CPUS); |
K. Y. Srinivasan | 917ea42 | 2012-12-01 06:46:47 -0800 | [diff] [blame] | 138 | memset(hv_context.vp_index, 0, |
| 139 | sizeof(int) * NR_CPUS); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 140 | |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 141 | max_leaf = query_hypervisor_info(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 142 | |
K. Y. Srinivasan | 83ba0c4 | 2012-07-24 16:11:58 -0700 | [diff] [blame] | 143 | /* |
| 144 | * Write our OS ID. |
| 145 | */ |
| 146 | hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0); |
| 147 | wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 148 | |
| 149 | /* See if the hypercall page is already set */ |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 150 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 151 | |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 152 | virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 153 | |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 154 | if (!virtaddr) |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 155 | goto cleanup; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 156 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 157 | hypercall_msr.enable = 1; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 158 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 159 | hypercall_msr.guest_physical_address = vmalloc_to_pfn(virtaddr); |
| 160 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 161 | |
| 162 | /* Confirm that hypercall page did get setup. */ |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 163 | hypercall_msr.as_uint64 = 0; |
| 164 | rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 165 | |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 166 | if (!hypercall_msr.enable) |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 167 | goto cleanup; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 168 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 169 | hv_context.hypercall_page = virtaddr; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 170 | |
K. Y. Srinivasan | 5433e00 | 2011-08-25 09:48:51 -0700 | [diff] [blame] | 171 | return 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 172 | |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 173 | cleanup: |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 174 | if (virtaddr) { |
| 175 | if (hypercall_msr.enable) { |
| 176 | hypercall_msr.as_uint64 = 0; |
| 177 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 180 | vfree(virtaddr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 181 | } |
K. Y. Srinivasan | 5433e00 | 2011-08-25 09:48:51 -0700 | [diff] [blame] | 182 | |
| 183 | return -ENOTSUPP; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 186 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 187 | * hv_cleanup - Cleanup routine. |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 188 | * |
| 189 | * This routine is called normally during driver unloading or exiting. |
| 190 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 191 | void hv_cleanup(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 192 | { |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 193 | union hv_x64_msr_hypercall_contents hypercall_msr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 194 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 195 | /* Reset our OS id */ |
| 196 | wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0); |
| 197 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 198 | if (hv_context.hypercall_page) { |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 199 | hypercall_msr.as_uint64 = 0; |
| 200 | wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 201 | vfree(hv_context.hypercall_page); |
| 202 | hv_context.hypercall_page = NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 203 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 204 | } |
| 205 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 206 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 207 | * hv_post_message - Post a message using the hypervisor message IPC. |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 208 | * |
| 209 | * This involves a hypercall. |
| 210 | */ |
Dan Carpenter | 415f0a0 | 2012-03-28 09:58:07 +0300 | [diff] [blame] | 211 | int hv_post_message(union hv_connection_id connection_id, |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 212 | enum hv_message_type message_type, |
| 213 | void *payload, size_t payload_size) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 214 | { |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 215 | struct aligned_input { |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 216 | u64 alignment8; |
Greg Kroah-Hartman | cba4dec | 2009-08-19 16:21:28 -0700 | [diff] [blame] | 217 | struct hv_input_post_message msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 218 | }; |
| 219 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 220 | struct hv_input_post_message *aligned_msg; |
Greg Kroah-Hartman | 034469e | 2009-08-20 12:14:11 -0700 | [diff] [blame] | 221 | u16 status; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 222 | unsigned long addr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 223 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 224 | if (payload_size > HV_MESSAGE_PAYLOAD_BYTE_COUNT) |
K. Y. Srinivasan | 39594ab | 2011-06-06 15:50:09 -0700 | [diff] [blame] | 225 | return -EMSGSIZE; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 226 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 227 | addr = (unsigned long)kmalloc(sizeof(struct aligned_input), GFP_ATOMIC); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 228 | if (!addr) |
K. Y. Srinivasan | 39594ab | 2011-06-06 15:50:09 -0700 | [diff] [blame] | 229 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 230 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 231 | aligned_msg = (struct hv_input_post_message *) |
Uwe Kleine-König | 7350968 | 2011-01-20 09:32:01 +0100 | [diff] [blame] | 232 | (ALIGN(addr, HV_HYPERCALL_PARAM_ALIGN)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 233 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 234 | aligned_msg->connectionid = connection_id; |
| 235 | aligned_msg->message_type = message_type; |
| 236 | aligned_msg->payload_size = payload_size; |
| 237 | memcpy((void *)aligned_msg->payload, payload, payload_size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 238 | |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 239 | status = do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL) |
| 240 | & 0xFFFF; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 241 | |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 242 | kfree((void *)addr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 243 | |
| 244 | return status; |
| 245 | } |
| 246 | |
| 247 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 248 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 249 | * hv_signal_event - |
| 250 | * Signal an event on the specified connection using the hypervisor event IPC. |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 251 | * |
| 252 | * This involves a hypercall. |
| 253 | */ |
K. Y. Srinivasan | 1f42248 | 2012-12-01 06:46:42 -0800 | [diff] [blame] | 254 | u16 hv_signal_event(void *con_id) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 255 | { |
Greg Kroah-Hartman | 034469e | 2009-08-20 12:14:11 -0700 | [diff] [blame] | 256 | u16 status; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 257 | |
K. Y. Srinivasan | 1f42248 | 2012-12-01 06:46:42 -0800 | [diff] [blame] | 258 | status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF); |
| 259 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 260 | return status; |
| 261 | } |
| 262 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 263 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 264 | * hv_synic_init - Initialize the Synthethic Interrupt Controller. |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 265 | * |
| 266 | * If it is already initialized by another entity (ie x2v shim), we need to |
| 267 | * retrieve the initialized message and event pages. Otherwise, we create and |
| 268 | * initialize the message and event pages. |
| 269 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 270 | void hv_synic_init(void *irqarg) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 271 | { |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 272 | u64 version; |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 273 | union hv_synic_simp simp; |
| 274 | union hv_synic_siefp siefp; |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 275 | union hv_synic_sint shared_sint; |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 276 | union hv_synic_scontrol sctrl; |
K. Y. Srinivasan | 917ea42 | 2012-12-01 06:46:47 -0800 | [diff] [blame] | 277 | u64 vp_index; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 278 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 279 | u32 irq_vector = *((u32 *)(irqarg)); |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 280 | int cpu = smp_processor_id(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 281 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 282 | if (!hv_context.hypercall_page) |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 283 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 284 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 285 | /* Check the version */ |
Greg Kroah-Hartman | a51ed7d | 2009-08-17 17:20:02 -0700 | [diff] [blame] | 286 | rdmsrl(HV_X64_MSR_SVERSION, version); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 287 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 288 | hv_context.synic_message_page[cpu] = |
| 289 | (void *)get_zeroed_page(GFP_ATOMIC); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 290 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 291 | if (hv_context.synic_message_page[cpu] == NULL) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 292 | pr_err("Unable to allocate SYNIC message page\n"); |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 293 | goto cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 294 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 295 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 296 | hv_context.synic_event_page[cpu] = |
| 297 | (void *)get_zeroed_page(GFP_ATOMIC); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 298 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 299 | if (hv_context.synic_event_page[cpu] == NULL) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 300 | pr_err("Unable to allocate SYNIC event page\n"); |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 301 | goto cleanup; |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | /* Setup the Synic's message page */ |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 305 | rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
| 306 | simp.simp_enabled = 1; |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 307 | simp.base_simp_gpa = virt_to_phys(hv_context.synic_message_page[cpu]) |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 308 | >> PAGE_SHIFT; |
| 309 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 310 | wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 311 | |
| 312 | /* Setup the Synic's event page */ |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 313 | rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
| 314 | siefp.siefp_enabled = 1; |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 315 | siefp.base_siefp_gpa = virt_to_phys(hv_context.synic_event_page[cpu]) |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 316 | >> PAGE_SHIFT; |
| 317 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 318 | wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
Hank Janssen | a73e6b7 | 2010-01-22 19:17:50 +0000 | [diff] [blame] | 319 | |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 320 | /* Setup the shared SINT. */ |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 321 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 322 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 323 | shared_sint.as_uint64 = 0; |
| 324 | shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */ |
| 325 | shared_sint.masked = false; |
K. Y. Srinivasan | 93511ba | 2011-08-27 11:31:37 -0700 | [diff] [blame] | 326 | shared_sint.auto_eoi = false; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 327 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 328 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 329 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 330 | /* Enable the global synic bit */ |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 331 | rdmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); |
| 332 | sctrl.enable = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 333 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 334 | wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 335 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 336 | hv_context.synic_initialized = true; |
K. Y. Srinivasan | 917ea42 | 2012-12-01 06:46:47 -0800 | [diff] [blame] | 337 | |
| 338 | /* |
| 339 | * Setup the mapping between Hyper-V's notion |
| 340 | * of cpuid and Linux' notion of cpuid. |
| 341 | * This array will be indexed using Linux cpuid. |
| 342 | */ |
| 343 | rdmsrl(HV_X64_MSR_VP_INDEX, vp_index); |
| 344 | hv_context.vp_index[cpu] = (u32)vp_index; |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 345 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 346 | |
K. Y. Srinivasan | 44939d3 | 2011-05-10 07:55:47 -0700 | [diff] [blame] | 347 | cleanup: |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 348 | if (hv_context.synic_event_page[cpu]) |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 349 | free_page((unsigned long)hv_context.synic_event_page[cpu]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 350 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 351 | if (hv_context.synic_message_page[cpu]) |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 352 | free_page((unsigned long)hv_context.synic_message_page[cpu]); |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 353 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 356 | /* |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 357 | * hv_synic_cleanup - Cleanup routine for hv_synic_init(). |
Greg Kroah-Hartman | 0831ad0 | 2009-08-31 20:23:33 -0700 | [diff] [blame] | 358 | */ |
Haiyang Zhang | d44890c | 2010-11-08 14:04:42 -0800 | [diff] [blame] | 359 | void hv_synic_cleanup(void *arg) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 360 | { |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 361 | union hv_synic_sint shared_sint; |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 362 | union hv_synic_simp simp; |
| 363 | union hv_synic_siefp siefp; |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 364 | int cpu = smp_processor_id(); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 365 | |
Haiyang Zhang | 6a0aaa1 | 2010-11-08 14:04:40 -0800 | [diff] [blame] | 366 | if (!hv_context.synic_initialized) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 367 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 368 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 369 | rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 370 | |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 371 | shared_sint.masked = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 372 | |
Greg Kroah-Hartman | 7692fd4 | 2010-01-08 09:06:40 -0800 | [diff] [blame] | 373 | /* Need to correctly cleanup in the case of SMP!!! */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 374 | /* Disable the interrupt */ |
Haiyang Zhang | b8dfb26 | 2010-11-08 14:04:41 -0800 | [diff] [blame] | 375 | wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 376 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 377 | rdmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
| 378 | simp.simp_enabled = 0; |
| 379 | simp.base_simp_gpa = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 380 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 381 | wrmsrl(HV_X64_MSR_SIMP, simp.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 382 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 383 | rdmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
| 384 | siefp.siefp_enabled = 0; |
| 385 | siefp.base_siefp_gpa = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 386 | |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 387 | wrmsrl(HV_X64_MSR_SIEFP, siefp.as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 388 | |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 389 | free_page((unsigned long)hv_context.synic_message_page[cpu]); |
| 390 | free_page((unsigned long)hv_context.synic_event_page[cpu]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 391 | } |