DMAR problem
Hello~!!
my dmesg is below.
===================================================================================
[ 0.000000] WARNING: at drivers/pci/dmar.c:634 warn_invalid_dmar+0x8f/0xa0()
[ 0.000000] Hardware name: System Product Name
[ 0.000000] Your BIOS is broken; DMAR reported at address fed90000 returns all ones!
[ 0.000000] BIOS vendor: American Megatrends Inc.; Ver: 1807 ; Product Version: System Version
[ 0.000000] Modules linked in:
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.37 #1
[ 0.000000] Call Trace:
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] [
[ 0.000000] ---[ end trace a7919e7f17c0a725 ]---
line 630 at drivers/pci/dmar.c
cap = dmar_readq(addr + DMAR_CAP_REG)
ecap = dmar_readq(addr + DMAR_ECAP_REG)
early_iounmap(addr, VTD_PAGE_SIZE)
if( cap == (uint64_t)-1 && ecap == (uint64_t)-1 ){
warn_invalid_dmar(drhd->address, "returns all ones" );
goto failed;
}
===================================================================================
so,.
if cap or ecap equal -1 , then kernel show warning message.
my mainboard is P7P55D-ASUS. use P55chipset
address is 0xfed90000
anyone have a solution?
regards
maple.
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