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| shorne | zx2c4: now I think I figured it out | 09:28 |
|---|---|---|
| zx2c4 | !! | 09:31 |
| shorne | https://gist.github.com/stffrdhrn/6285f162b00f945aa1129f2b4ed154e8 | 09:34 |
| shorne | this patch fixes it for me | 09:34 |
| shorne | the problem was as expected, after TB exits due to exception on page boundary | 09:35 |
| shorne | qemu-exec will save state from TB to ENV | 09:35 |
| shorne | by default it uses set_pc if schronize_from_tb is not provided | 09:35 |
| shorne | openriscs set_pc implementation clears the delay slot flag!! | 09:36 |
| shorne | so I just procide schronize_from_tb callback without the code to clear the delay slot flag | 09:36 |
| shorne | and it seems to work | 09:36 |
| shorne | I think I need to maybe think of a few other cases but it should be good | 09:36 |
| shorne | zx2c4: when you have time check the patch, otherwise I will fix it up and send an official patch maybe later tonight | 09:42 |
| shorne | cooking dinner now | 09:42 |
| zx2c4 | Awesome! Will take a look | 09:43 |
| zx2c4 | shorne: do you have a qemu tree where youve collected all these patches? | 12:51 |
| zx2c4 | looks like not from your github | 12:58 |
| zx2c4 | ill make something now in case it helps | 12:58 |
| zx2c4 | shorne: also, wireguard status: https://git.zx2c4.com/wireguard-linux/commit/?h=jd/openrisc | 13:30 |
| tpb | Title: wireguard-linux - WireGuard for the Linux kernel (at git.zx2c4.com) | 13:30 |
| zx2c4 | and here's the qemu tree of patches needed: https://git.zx2c4.com/qemu-openrisc/log/ | 13:30 |
| tpb | Title: qemu-openrisc - Various patches to make QEMU work with OpenRISC (at git.zx2c4.com) | 13:30 |
| zx2c4 | so basically: kernel l.nop thing [written, unmerged], qemu patches [written, unmerged], qemu mttcg [unwritten] | 13:31 |
| zx2c4 | shorne: nice tweet storm! | 13:41 |
| shorne | I have a tree | 13:54 |
| shorne | https://github.com/stffrdhrn/qemu/commits/or1k-fixes-700 | 13:55 |
| shorne | I just have not staged implement shutdown and reset helpers | 13:57 |
| shorne | 'implement shutdown and reset helpers' | 13:57 |
| shorne | zx2c4: the 'implement shutdown and reset helpers' patch needs additional work of documentation and move to semihosting | 13:57 |
| shorne | Now hopefully the main issues are fixed I can pop the stack and work on those things | 13:58 |
| shorne | I plan to do in order | 13:58 |
| shorne | 1. Need to finish off a mor1kx patch to fix a bug with data-cache, fixed but need to cleanup series and record some other issues | 13:59 |
| shorne | 2. Get my kernel patches into next for or1k | 13:59 |
| shorne | 3. Send qemu patches upstream | 13:59 |
| shorne | 4. work on openrisc spec for simulator ABI | 14:00 |
| zx2c4 | 5. mttcg? | 14:40 |
| zx2c4 | shorne: ^ | 14:40 |
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| shorne | zx2c4: yeah, that too fixing my multithread TCG patch | 20:55 |
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