Signed-off-by: Stefan Tauner stefan.tauner@student.tuwien.ac.at --- chipset_enable.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/chipset_enable.c b/chipset_enable.c index b5385dc..5f1a6fd 100644 --- a/chipset_enable.c +++ b/chipset_enable.c @@ -264,8 +264,17 @@ static int enable_flash_ich(struct pci_dev *dev, const char *name, (old & (1 << 0)) ? "en" : "dis"); msg_pdbg("BIOS_CNTL is 0x%x\n", old);
- new = old | 1; + /* + * Quote from the 6 Series datasheet: + * "5: SMM BIOS Write Protect Disable (SMM_BWP) + * 1 = BIOS region SMM protection is enabled. + * The BIOS Region is not writable unless all processors are in SMM." + * In earlier chipsets this bit is reserved. */ + if (old & (1 << 5)) { + msg_pinfo("WARNING: BIOS region SMM protection is enabled!\n"); + }
+ new = old | 1; if (new == old) return 0;