diff options
| -rw-r--r-- | src/drivers/pc80/tpm/acpi/tpm.asl | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/drivers/pc80/tpm/acpi/tpm.asl b/src/drivers/pc80/tpm/acpi/tpm.asl index 0562f2a935..ece63e25e3 100644 --- a/src/drivers/pc80/tpm/acpi/tpm.asl +++ b/src/drivers/pc80/tpm/acpi/tpm.asl @@ -101,4 +101,96 @@ Device (TPM) Return (RBUF) } } + + /* Dummy _DSM to make Bitlocker work. */ + Method (_DSM, 4, Serialized) + { + /* Physical presence interface. + This is used to submit commands like "Clear TPM" to + be run at next reboot provided that user confirms them. + Spec allows user to cancel all commands and/or + configure BIOS to reject commands. So we pretend that + user did just this: cancelled everything. If user + really wants to clear TPM the only option now is to do it manually + in payload. + */ + If (LEqual (Arg0, ToUUID ("3dddfaa6-361b-4eb4-a424-8d10089d1653"))) + { + If (LEqual (Arg2, 0)) + { + /* Functions 1-8. */ + Return (Buffer (2) { 0xFF, 0x01 }) + } + + /* Interface version: 1.2 */ + If (LEqual (Arg2, 1)) + { + Return ("1.2") + } + + /* Submit operations: drop on the floor and return success. */ + If (LEqual (Arg2, 2)) + { + Return (0x00) + } + + /* Pending operation: none. */ + If (LEqual (Arg2, 3)) + { + Return (Package (2) { 0, 0 }) + } + + /* Pre-OS transition method: reboot. */ + If (LEqual (Arg2, 4)) + { + Return (2) + } + + /* Operation response: no operation executed. */ + If (LEqual (Arg2, 5)) + { + Return (Package (3) { 0, 0, 0 }) + } + + /* Set preffered user language: deprecated and must return 3 aka "not implemented". */ + If (LEqual (Arg2, 6)) + { + Return (3) + } + + /* Submit operations: deny. */ + If (LEqual (Arg2, 7)) + { + Return (3) + } + + /* All actions are forbidden. */ + If (LEqual (Arg2, 8)) + { + Return (1) + } + + Return (1) + } + + /* Memory clearing on boot: just a dummy. */ + If (LEqual (Arg0, ToUUID("376054ed-cc13-4675-901c-4756d7f2d45d"))) + { + If (LEqual (Arg2, 0)) + { + /* Function 1. */ + Return (Buffer (1) { 3 }) + } + + /* Just return success. */ + If (LEqual (Arg2, 1)) + { + Return (0) + } + + Return (1) + } + + Return (Buffer (1) { 0 }) + } } |