Re: [PATCH v2 09/14] arm64: Enable memory encrypt for Realms

Suzuki K Poulose
2024-04-25T13:43:03Z

On 15/04/2024 04:13, kernel test robot wrote:
> Hi Steven,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on arm64/for-next/core]
> [also build test ERROR on kvmarm/next efi/next tip/irq/core linus/master v6.9-rc3 next-20240412]
> [cannot apply to arnd-asm-generic/master]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url: https://github.com/intel-lab-lkp/linux/commits/Steven-Price/arm64-rsi-Add-RSI-definitions/20240412-164852
> base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
> patch link: https://lore.kernel.org/r/20240412084213.1733764-10-steven.price%40arm.com
> patch subject: [PATCH v2 09/14] arm64: Enable memory encrypt for Realms
> config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20240415/202404151003.vkNApJiS-lkp@intel.com/config)
> compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 8b3b4a92adee40483c27f26c478a384cd69c6f05)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240415/202404151003.vkNApJiS-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202404151003.vkNApJiS-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> In file included from drivers/hv/hv.c:13:
> In file included from include/linux/mm.h:2208:
> include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 509 | item];
> | ~~~~
> include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 516 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
> 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
> | ~~~~~~~~~~~ ^ ~~~
> include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 528 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 537 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/hv/hv.c:132:10: error: call to undeclared function 'set_memory_decrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 132 | ret = set_memory_decrypted((unsigned long)hv_cpu->post_msg_page, 1);
> | ^
> drivers/hv/hv.c:168:10: error: call to undeclared function 'set_memory_decrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 168 | ret = set_memory_decrypted((unsigned long)
> | ^
>>> drivers/hv/hv.c:218:11: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 218 | ret = set_memory_encrypted((unsigned long)
> | ^
> drivers/hv/hv.c:230:11: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 230 | ret = set_memory_encrypted((unsigned long)
> | ^
> drivers/hv/hv.c:239:11: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 239 | ret = set_memory_encrypted((unsigned long)
> | ^
> 5 warnings and 5 errors generated.
> --
> In file included from drivers/hv/connection.c:16:
> In file included from include/linux/mm.h:2208:
> include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 509 | item];
> | ~~~~
> include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 516 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
> 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
> | ~~~~~~~~~~~ ^ ~~~
> include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 528 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 537 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/hv/connection.c:236:8: error: call to undeclared function 'set_memory_decrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 236 | ret = set_memory_decrypted((unsigned long)
> | ^
>>> drivers/hv/connection.c:340:2: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 340 | set_memory_encrypted((unsigned long)vmbus_connection.monitor_pages[0], 1);
> | ^
> 5 warnings and 2 errors generated.
> --
> In file included from drivers/hv/channel.c:14:
> In file included from include/linux/mm.h:2208:
> include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 509 | item];
> | ~~~~
> include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 516 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
> 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
> | ~~~~~~~~~~~ ^ ~~~
> include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 528 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
> include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
> 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~ ^
> 537 | NR_VM_NUMA_EVENT_ITEMS +
> | ~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/hv/channel.c:442:8: error: call to undeclared function 'set_memory_decrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 442 | ret = set_memory_decrypted((unsigned long)kbuffer,
> | ^
>>> drivers/hv/channel.c:531:3: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 531 | set_memory_encrypted((unsigned long)kbuffer,
> | ^
> drivers/hv/channel.c:848:8: error: call to undeclared function 'set_memory_encrypted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> 848 | ret = set_memory_encrypted((unsigned long)gpadl->buffer,
> | ^
> 5 warnings and 3 errors generated.

Thats my mistake. The correct place for declaring set_memory_*crypted()
is asm/set_memory.h not asm/mem_encrypt.h.

Steven, please could you fold this patch below :

diff --git a/arch/arm64/include/asm/mem_encrypt.h
b/arch/arm64/include/asm/mem_encrypt.h
index 7381f9585321..e47265cd180a 100644
--- a/arch/arm64/include/asm/mem_encrypt.h
+++ b/arch/arm64/include/asm/mem_encrypt.h
@@ -14,6 +14,4 @@ static inline bool force_dma_unencrypted(struct device
*dev)
return is_realm_world();
}

-int set_memory_encrypted(unsigned long addr, int numpages);
-int set_memory_decrypted(unsigned long addr, int numpages);
#endif
diff --git a/arch/arm64/include/asm/set_memory.h
b/arch/arm64/include/asm/set_memory.h
index 0f740b781187..9561b90fb43c 100644
--- a/arch/arm64/include/asm/set_memory.h
+++ b/arch/arm64/include/asm/set_memory.h
@@ -14,4 +14,6 @@ int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
bool kernel_page_present(struct page *page);

+int set_memory_encrypted(unsigned long addr, int numpages);
+int set_memory_decrypted(unsigned long addr, int numpages);

Suzuki
>
>
> vim +/set_memory_decrypted +132 drivers/hv/hv.c
>
> 3e7ee4902fe699 drivers/staging/hv/Hv.c Hank Janssen 2009-07-13 96
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 97 int hv_synic_alloc(void)
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 98 {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 99 int cpu, ret = -ENOMEM;
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 100 struct hv_per_cpu_context *hv_cpu;
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 101
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 102 /*
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 103 * First, zero all per-cpu memory areas so hv_synic_free() can
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 104 * detect what memory has been allocated and cleanup properly
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 105 * after any failures.
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 106 */
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 107 for_each_present_cpu(cpu) {
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 108 hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 109 memset(hv_cpu, 0, sizeof(*hv_cpu));
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 110 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 111
> 6396bb221514d2 drivers/hv/hv.c Kees Cook 2018-06-12 112 hv_context.hv_numa_map = kcalloc(nr_node_ids, sizeof(struct cpumask),
> 597ff72f3de850 drivers/hv/hv.c Jia-Ju Bai 2018-03-04 113 GFP_KERNEL);
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 114 if (hv_context.hv_numa_map == NULL) {
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 115 pr_err("Unable to allocate NUMA map\n");
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 116 goto err;
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 117 }
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 118
> 421b8f20d3c381 drivers/hv/hv.c Vitaly Kuznetsov 2016-12-07 119 for_each_present_cpu(cpu) {
> f25a7ece08bdb1 drivers/hv/hv.c Michael Kelley 2018-08-10 120 hv_cpu = per_cpu_ptr(hv_context.cpu_context, cpu);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 121
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 122 tasklet_init(&hv_cpu->msg_dpc,
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 123 vmbus_on_msg_dpc, (unsigned long) hv_cpu);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 124
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 125 if (ms_hyperv.paravisor_present && hv_isolation_type_tdx()) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 126 hv_cpu->post_msg_page = (void *)get_zeroed_page(GFP_ATOMIC);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 127 if (hv_cpu->post_msg_page == NULL) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 128 pr_err("Unable to allocate post msg page\n");
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 129 goto err;
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 130 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 131
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 @132 ret = set_memory_decrypted((unsigned long)hv_cpu->post_msg_page, 1);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 133 if (ret) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 134 pr_err("Failed to decrypt post msg page: %d\n", ret);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 135 /* Just leak the page, as it's unsafe to free the page. */
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 136 hv_cpu->post_msg_page = NULL;
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 137 goto err;
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 138 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 139
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 140 memset(hv_cpu->post_msg_page, 0, PAGE_SIZE);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 141 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 142
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 143 /*
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 144 * Synic message and event pages are allocated by paravisor.
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 145 * Skip these pages allocation here.
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 146 */
> d3a9d7e49d1531 drivers/hv/hv.c Dexuan Cui 2023-08-24 147 if (!ms_hyperv.paravisor_present && !hv_root_partition) {
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 148 hv_cpu->synic_message_page =
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 149 (void *)get_zeroed_page(GFP_ATOMIC);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 150 if (hv_cpu->synic_message_page == NULL) {
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 151 pr_err("Unable to allocate SYNIC message page\n");
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 152 goto err;
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 153 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 154
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 155 hv_cpu->synic_event_page =
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 156 (void *)get_zeroed_page(GFP_ATOMIC);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 157 if (hv_cpu->synic_event_page == NULL) {
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 158 pr_err("Unable to allocate SYNIC event page\n");
> 68f2f2bc163d44 drivers/hv/hv.c Dexuan Cui 2023-08-24 159
> 68f2f2bc163d44 drivers/hv/hv.c Dexuan Cui 2023-08-24 160 free_page((unsigned long)hv_cpu->synic_message_page);
> 68f2f2bc163d44 drivers/hv/hv.c Dexuan Cui 2023-08-24 161 hv_cpu->synic_message_page = NULL;
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 162 goto err;
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 163 }
> faff44069ff538 drivers/hv/hv.c Tianyu Lan 2021-10-25 164 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 165
> 68f2f2bc163d44 drivers/hv/hv.c Dexuan Cui 2023-08-24 166 if (!ms_hyperv.paravisor_present &&
> e3131f1c81448a drivers/hv/hv.c Dexuan Cui 2023-08-24 167 (hv_isolation_type_snp() || hv_isolation_type_tdx())) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 168 ret = set_memory_decrypted((unsigned long)
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 169 hv_cpu->synic_message_page, 1);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 170 if (ret) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 171 pr_err("Failed to decrypt SYNIC msg page: %d\n", ret);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 172 hv_cpu->synic_message_page = NULL;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 173
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 174 /*
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 175 * Free the event page here so that hv_synic_free()
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 176 * won't later try to re-encrypt it.
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 177 */
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 178 free_page((unsigned long)hv_cpu->synic_event_page);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 179 hv_cpu->synic_event_page = NULL;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 180 goto err;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 181 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 182
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 183 ret = set_memory_decrypted((unsigned long)
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 184 hv_cpu->synic_event_page, 1);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 185 if (ret) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 186 pr_err("Failed to decrypt SYNIC event page: %d\n", ret);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 187 hv_cpu->synic_event_page = NULL;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 188 goto err;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 189 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 190
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 191 memset(hv_cpu->synic_message_page, 0, PAGE_SIZE);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 192 memset(hv_cpu->synic_event_page, 0, PAGE_SIZE);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 193 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 194 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 195
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 196 return 0;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 197
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 198 err:
> 572086325ce9a9 drivers/hv/hv.c Michael Kelley 2018-08-02 199 /*
> 572086325ce9a9 drivers/hv/hv.c Michael Kelley 2018-08-02 200 * Any memory allocations that succeeded will be freed when
> 572086325ce9a9 drivers/hv/hv.c Michael Kelley 2018-08-02 201 * the caller cleans up by calling hv_synic_free()
> 572086325ce9a9 drivers/hv/hv.c Michael Kelley 2018-08-02 202 */
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 203 return ret;
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 204 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 205
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 206
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 207 void hv_synic_free(void)
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 208 {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 209 int cpu, ret;
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 210
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 211 for_each_present_cpu(cpu) {
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 212 struct hv_per_cpu_context *hv_cpu
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 213 = per_cpu_ptr(hv_context.cpu_context, cpu);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 214
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 215 /* It's better to leak the page if the encryption fails. */
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 216 if (ms_hyperv.paravisor_present && hv_isolation_type_tdx()) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 217 if (hv_cpu->post_msg_page) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 @218 ret = set_memory_encrypted((unsigned long)
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 219 hv_cpu->post_msg_page, 1);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 220 if (ret) {
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 221 pr_err("Failed to encrypt post msg page: %d\n", ret);
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 222 hv_cpu->post_msg_page = NULL;
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 223 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 224 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 225 }
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 226
> 68f2f2bc163d44 drivers/hv/hv.c Dexuan Cui 2023-08-24 227 if (!ms_hyperv.paravisor_present &&
> e3131f1c81448a drivers/hv/hv.c Dexuan Cui 2023-08-24 228 (hv_isolation_type_snp() || hv_isolation_type_tdx())) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 229 if (hv_cpu->synic_message_page) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 230 ret = set_memory_encrypted((unsigned long)
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 231 hv_cpu->synic_message_page, 1);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 232 if (ret) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 233 pr_err("Failed to encrypt SYNIC msg page: %d\n", ret);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 234 hv_cpu->synic_message_page = NULL;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 235 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 236 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 237
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 238 if (hv_cpu->synic_event_page) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 239 ret = set_memory_encrypted((unsigned long)
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 240 hv_cpu->synic_event_page, 1);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 241 if (ret) {
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 242 pr_err("Failed to encrypt SYNIC event page: %d\n", ret);
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 243 hv_cpu->synic_event_page = NULL;
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 244 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 245 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 246 }
> 193061ea0a50c1 drivers/hv/hv.c Tianyu Lan 2023-08-18 247
> 23378295042a4b drivers/hv/hv.c Dexuan Cui 2023-08-24 248 free_page((unsigned long)hv_cpu->post_msg_page);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 249 free_page((unsigned long)hv_cpu->synic_event_page);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 250 free_page((unsigned long)hv_cpu->synic_message_page);
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 251 }
> 37cdd991fac810 drivers/hv/hv.c Stephen Hemminger 2017-02-11 252
> 9f01ec53458d9e drivers/hv/hv.c K. Y. Srinivasan 2015-08-05 253 kfree(hv_context.hv_numa_map);
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 254 }
> 2608fb65310341 drivers/hv/hv.c Jason Wang 2013-06-19 255
>