re: radeon RV730 in iMac troubleshooting
ah, i am reminded of this channge that went in recently: https://mail-index.netbsd.org/source-changes/2023/11/06/msg148463.html can you try a -current snapshot and see if it works less badly? .mrg.
re: radeon RV730 in iMac troubleshooting
some random ideas/info about this, no real help yet.
Josh Moyer writes:
> I hacked kern/init_main.c to panic on line 739 before the display goes dark
> and the last two dmesgs are:
>
> pci_mem_find: void region (dev/pci/pci_map.c)
hmm, this one happens when the mapping size is 0. can you post the
output of "pcictl pciN dump -d 0", for whatever "radeon0 at pciN"
matches the dmesg logs, for a boot that disabled radeon0.
> radeon0: map 5 failed (could not find corresponding source file)
this comes from sys/external/bsd/drm2/pci/drm_pci.c:
115 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, type,
116 >bm_base, >bm_size, >bm_flags) != 0) {
117 aprint_debug_dev(self, "map %u failed\n", unit);
which is basically reporting the same error. BAR5 has no size.
this may be related to it not doing a POST properly, and our code
isn't properly doing that first.. eg, radeon_r300.c:r300_init()
calls radeon_boot_test_post_card(), which will do POST if it has
not been done... though it relies upon vbios being found.
.mrg.
radeon RV730 in iMac troubleshooting
Hi Tech-Kern, Sadly, the radeon DRM2 driver must be disabled with userconf in order to successfully boot a mid 2010 21.5" iMac (Radeon HD 4670 256MB/RV730) -- otherwise the screen goes black when the kernel is switching to userland/init. I'm using 10_RC1 and also had this problem in the beta and also in 9, I think. I hacked kern/init_main.c to panic on line 739 before the display goes dark and the last two dmesgs are: pci_mem_find: void region (dev/pci/pci_map.c) radeon0: map 5 failed (could not find corresponding source file) Oddly, ddb isn't invoked, despite ddb.onpanic=1, so I can't generate a kernel memory dump. I tried getting more debug output by using various config options, including the following without much luck: DIAGNOSTIC, DEBUG, DRM_DEBUG, DRM2_DEBUG, RADEON_DEBUG I even tried to comment out radeon and uncomment radeondrm in the config, but get a lot of errors at link time complaining about undefined references in the radeondrm code. Before I start hacking at pci_map.c, I wanted to check if anyone has any insights or experience or suggestions in this area. Thanks in advance for your help. Really want that hardware acceleration -- surprise, surprise! ;-) _ | * * | Josh Moyer (he/him) |*(*)*| http://jmoyer.nodomain.net/ \ - /http://www.nodomain.net/ \// Love, Responsibility, Justice Liebe, Verantwortung, Gerechtigkeit Please don't eat the animals. Thanks.
Re: PVH boot with qemu
On Mon, Nov 13, 2023 at 06:37:01AM +0100, Emile `iMil' Heitor wrote: > > I first asked guidance in port-xen@ but the topic doesn't seem to have much > success, I'll try my chances here. > > I am trying to make NetBSD/amd64 boot in PVH mode with qemu, using qemu's > -kernel flag. The kernel does start executing thanks to the first step > explained here > https://www.daemonology.net/blog/2022-10-18-FreeBSD-Firecracker.html > i.e. adding PVH entry point to the kernel ELF notes. > >#define ELFNOTE(name, type, desctype, descdata...) \ > -.pushsection .note.name; \ > +.pushsection .note.name, "a", @note; \ > .align 4 ; \ > .long 2f - 1f/* namesz */; \ > .long 4f - 3f/* descsz */; \ > @@ -588,6 +603,8 @@ next: pop %edi > movl%eax,(%ebp) > > The start_xen32 entrypoint is then found, and the kernel start, but falls in > an infinite loop in locore.S when mapping symbols and preloaded modules, > more precisely, in the fillkpt_nox macro. I assume %ecx is wrong or the region > corrupted for some reason. > https://github.com/NetBSD/src/blob/trunk/sys/arch/amd64/amd64/locore.S#L738 I don't think you can use start_xen32 as is, as it expects a Xen environnemwnt. You may need to write a new start routine, or make a difference between Xen vs non-Xen in the existing one. -- Manuel Bouyer NetBSD: 26 ans d'experience feront toujours la difference --
