1 files changed, 37 insertions, 12 deletions

diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_bios.c
index 5bcbaef53798..e45f0d3d12de 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_bios.c
@@ -29,6 +29,11 @@
 #define MAX_TEXT_EVENT          1000    /* Max event string length */
 #define ACPI_TCPA_SIG           "TCPA"  /* 0x41504354 /'TCPA' */
 
+enum bios_platform_class {
+        BIOS_CLIENT = 0x00,
+        BIOS_SERVER = 0x01,
+};
+
 struct tpm_bios_log {
         void *bios_event_log;
         void *bios_event_log_end;
@@ -36,9 +41,18 @@ struct tpm_bios_log {
 
 struct acpi_tcpa {
         struct acpi_table_header hdr;
-        u16 reserved;
-        u32 log_max_len __attribute__ ((packed));
-        u32 log_start_addr __attribute__ ((packed));
+        u16 platform_class;
+        union {
+                struct client_hdr {
+                        u32 log_max_len __attribute__ ((packed));
+                        u64 log_start_addr __attribute__ ((packed));
+                } client;
+                struct server_hdr {
+                        u16 reserved;
+                        u64 log_max_len __attribute__ ((packed));
+                        u64 log_start_addr __attribute__ ((packed));
+                } server;
+        };
 };
 
 struct tcpa_event {
@@ -379,6 +393,7 @@ static int read_log(struct tpm_bios_log *log)
         struct acpi_tcpa *buff;
         acpi_status status;
         struct acpi_table_header *virt;
+        u64 len, start;
 
         if (log->bios_event_log != NULL) {
                 printk(KERN_ERR
@@ -399,27 +414,37 @@ static int read_log(struct tpm_bios_log *log)
                 return -EIO;
         }
 
-        if (buff->log_max_len == 0) {
+        switch(buff->platform_class) {
+        case BIOS_SERVER:
+                len = buff->server.log_max_len;
+                start = buff->server.log_start_addr;
+                break;
+        case BIOS_CLIENT:
+        default:
+                len = buff->client.log_max_len;
+                start = buff->client.log_start_addr;
+                break;
+        }
+        if (!len) {
                 printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
                 return -EIO;
         }
 
         /* malloc EventLog space */
-        log->bios_event_log = kmalloc(buff->log_max_len, GFP_KERNEL);
+        log->bios_event_log = kmalloc(len, GFP_KERNEL);
         if (!log->bios_event_log) {
-                printk
-                    ("%s: ERROR - Not enough  Memory for BIOS measurements\n",
-                     __func__);
+                printk("%s: ERROR - Not enough  Memory for BIOS measurements\n",
+                        __func__);
                 return -ENOMEM;
         }
 
-        log->bios_event_log_end = log->bios_event_log + buff->log_max_len;
+        log->bios_event_log_end = log->bios_event_log + len;
 
-        acpi_os_map_memory(buff->log_start_addr, buff->log_max_len, (void *) &virt);
+        acpi_os_map_memory(start, len, (void *) &virt);
 
-        memcpy(log->bios_event_log, virt, buff->log_max_len);
+        memcpy(log->bios_event_log, virt, len);
 
-        acpi_os_unmap_memory(virt, buff->log_max_len);
+        acpi_os_unmap_memory(virt, len);
         return 0;
 }