Am 14.05.2021 um 18:44 schrieb Harry Schmalzbauer:
Am 16.10.2020 um 11:35 schrieb Wei Hu via freebsd-virtualization:
:
Did you try 12.0? Maybe something changed in 12.x causes failure.
I386 is not well tested on Hyper-V. I will try to reproduce and take
a look.
The regression happened before 12.0.
Today I stumbled across this problem too and tried 11.4 (/May 8th,
2020) /sucessfully, while 12.0 (/Oct 19th, 2018)/ is failing with i386
releases.
One commit which is in 12 but not in 11.4 is r332489.
:
:
:
Unfortunately beyond my skills.
In sys/x86/x86/local_apic.c, I added this debug printf:
for (idx = IPI_DYN_FIRST; idx <= IPI_DYN_LAST; idx++) {
printf("DEBUG: native_lapic_ipi_alloc(), idx = %i\n", idx);
ip = &idt[idx];
func = (ip->gd_hioffset << 16) | ip->gd_looffset;
if ((!pti && func == (uintptr_t)&IDTVEC(rsvd)) ||
(pti && func == (uintptr_t)&IDTVEC(rsvd_pti))) {
vector = idx;
setidt(vector, ipifunc, SDT_APIC, SEL_KPL,
GSEL_APIC);
break;
}
}
This is my latest attempt to see if at least the origin of my fault
tracing matches.
It does.
From #define IPI_DYN_FIRST (APIC_IPI_INTS + 9) in
sys/x86/include/apicvar.h
I expected to see 252, 253 and 254, which I sucessfully verified.
Now comes the part I cannot read: (uintptr_t)&IDTVEC(rsvd)
IDTVEC(rsvd) seems to be a assembler makro from sys/i386/i386/exception.s
But now it doesn't make any sense for me to dig further, I simply do not
understand it.
Unfortunately having broken i386 support on Hyper-V is not a cosmetic issue.
Removing "device hyperv" from kernel gives access to the v-hdd via
legacy IDE/ada, but then I have no NIC.
Choosing between missing HDD and missing network support is hard
nowadays ;-)
Any help getting i386 up and running back on Hyper-V highly
appreciated! 11.4 is the latest working version, all i386-releases
starting with 12.0 don't work!
Thanks,
-harry
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