diff options
Diffstat (limited to 'drivers/hv/connection.c')
| -rw-r--r-- | drivers/hv/connection.c | 113 |
1 files changed, 28 insertions, 85 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index da51b50787df..5978e9dbc286 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -104,8 +104,14 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) vmbus_connection.msg_conn_id = VMBUS_MESSAGE_CONNECTION_ID; } - msg->monitor_page1 = vmbus_connection.monitor_pages_pa[0]; - msg->monitor_page2 = vmbus_connection.monitor_pages_pa[1]; + /* + * shared_gpa_boundary is zero in non-SNP VMs, so it's safe to always + * bitwise OR it + */ + msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]) | + ms_hyperv.shared_gpa_boundary; + msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]) | + ms_hyperv.shared_gpa_boundary; msg->target_vcpu = hv_cpu_number_to_vp_number(VMBUS_CONNECT_CPU); @@ -219,72 +225,27 @@ int vmbus_connect(void) * Setup the monitor notification facility. The 1st page for * parent->child and the 2nd page for child->parent */ - vmbus_connection.monitor_pages[0] = (void *)hv_alloc_hyperv_zeroed_page(); - vmbus_connection.monitor_pages[1] = (void *)hv_alloc_hyperv_zeroed_page(); + vmbus_connection.monitor_pages[0] = (void *)hv_alloc_hyperv_page(); + vmbus_connection.monitor_pages[1] = (void *)hv_alloc_hyperv_page(); if ((vmbus_connection.monitor_pages[0] == NULL) || (vmbus_connection.monitor_pages[1] == NULL)) { ret = -ENOMEM; goto cleanup; } - vmbus_connection.monitor_pages_original[0] - = vmbus_connection.monitor_pages[0]; - vmbus_connection.monitor_pages_original[1] - = vmbus_connection.monitor_pages[1]; - vmbus_connection.monitor_pages_pa[0] - = virt_to_phys(vmbus_connection.monitor_pages[0]); - vmbus_connection.monitor_pages_pa[1] - = virt_to_phys(vmbus_connection.monitor_pages[1]); - - if (hv_is_isolation_supported()) { - ret = set_memory_decrypted((unsigned long) - vmbus_connection.monitor_pages[0], - 1); - ret |= set_memory_decrypted((unsigned long) - vmbus_connection.monitor_pages[1], - 1); - if (ret) - goto cleanup; - - /* - * Isolation VM with AMD SNP needs to access monitor page via - * address space above shared gpa boundary. - */ - if (hv_isolation_type_snp()) { - vmbus_connection.monitor_pages_pa[0] += - ms_hyperv.shared_gpa_boundary; - vmbus_connection.monitor_pages_pa[1] += - ms_hyperv.shared_gpa_boundary; - - vmbus_connection.monitor_pages[0] - = memremap(vmbus_connection.monitor_pages_pa[0], - HV_HYP_PAGE_SIZE, - MEMREMAP_WB); - if (!vmbus_connection.monitor_pages[0]) { - ret = -ENOMEM; - goto cleanup; - } - - vmbus_connection.monitor_pages[1] - = memremap(vmbus_connection.monitor_pages_pa[1], - HV_HYP_PAGE_SIZE, - MEMREMAP_WB); - if (!vmbus_connection.monitor_pages[1]) { - ret = -ENOMEM; - goto cleanup; - } - } - - /* - * Set memory host visibility hvcall smears memory - * and so zero monitor pages here. - */ - memset(vmbus_connection.monitor_pages[0], 0x00, - HV_HYP_PAGE_SIZE); - memset(vmbus_connection.monitor_pages[1], 0x00, - HV_HYP_PAGE_SIZE); + ret = set_memory_decrypted((unsigned long) + vmbus_connection.monitor_pages[0], 1); + ret |= set_memory_decrypted((unsigned long) + vmbus_connection.monitor_pages[1], 1); + if (ret) + goto cleanup; - } + /* + * Set_memory_decrypted() will change the memory contents if + * decryption occurs, so zero monitor pages here. + */ + memset(vmbus_connection.monitor_pages[0], 0x00, HV_HYP_PAGE_SIZE); + memset(vmbus_connection.monitor_pages[1], 0x00, HV_HYP_PAGE_SIZE); msginfo = kzalloc(sizeof(*msginfo) + sizeof(struct vmbus_channel_initiate_contact), @@ -376,31 +337,13 @@ void vmbus_disconnect(void) vmbus_connection.int_page = NULL; } - if (hv_is_isolation_supported()) { - /* - * memunmap() checks input address is ioremap address or not - * inside. It doesn't unmap any thing in the non-SNP CVM and - * so not check CVM type here. - */ - memunmap(vmbus_connection.monitor_pages[0]); - memunmap(vmbus_connection.monitor_pages[1]); - - set_memory_encrypted((unsigned long) - vmbus_connection.monitor_pages_original[0], - 1); - set_memory_encrypted((unsigned long) - vmbus_connection.monitor_pages_original[1], - 1); - } + set_memory_encrypted((unsigned long)vmbus_connection.monitor_pages[0], 1); + set_memory_encrypted((unsigned long)vmbus_connection.monitor_pages[1], 1); - hv_free_hyperv_page((unsigned long) - vmbus_connection.monitor_pages_original[0]); - hv_free_hyperv_page((unsigned long) - vmbus_connection.monitor_pages_original[1]); - vmbus_connection.monitor_pages_original[0] = - vmbus_connection.monitor_pages[0] = NULL; - vmbus_connection.monitor_pages_original[1] = - vmbus_connection.monitor_pages[1] = NULL; + hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[0]); + hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[1]); + vmbus_connection.monitor_pages[0] = NULL; + vmbus_connection.monitor_pages[1] = NULL; } /* |