diff options
| -rw-r--r-- | sys/src/9/pc/mtrr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/src/9/pc/mtrr.c b/sys/src/9/pc/mtrr.c index 7601ef543..f840b159d 100644 --- a/sys/src/9/pc/mtrr.c +++ b/sys/src/9/pc/mtrr.c @@ -678,6 +678,10 @@ mtrr(uvlong base, uvlong size, char *tstr) if((new.type = str2type(tstr)) < 0) return "bad cache type"; + if(new.type == Writecomb + && (cpu0state.cap & Capwc) == 0) + return "write combining not supported"; + qlock(&mtrrlk); newstate = cpu0state; nr = getranges(&newstate, ranges, Nranges, &new); |