Date: Sun, 16 Jun 2024 11:12:50 +0300 From: Oleksandr Kryvulia <shuriku@shurik.kiev.ua> To: virtualization@freebsd.org Subject: Re: bhyve passthru problem Message-ID: <86822716-b32d-4663-9b73-87d7c977b70a@shurik.kiev.ua> In-Reply-To: <CA%2B1FSiiw3Y3Po=MiCPYM3a4-738uOO3daX0XNybQ9gBhwTB0OQ@mail.gmail.com> References: <a63589a8-2cb2-4952-83b1-7a97e2f8cd44@shurik.kiev.ua> <38c9656c26fc3cee7ba733168c0fa2cdd01209d9.camel@FreeBSD.org> <c8c87fc3-2665-44c3-a8cf-6dcbd6525c38@freebsd.org> <92b37bf8-7ef9-4abd-8617-af12fbb35e13@shurik.kiev.ua> <CA%2B1FSiiw3Y3Po=MiCPYM3a4-738uOO3daX0XNybQ9gBhwTB0OQ@mail.gmail.com>
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This is a multi-part message in MIME format. --------------7snt0nwRoQ10iL18xHBQ35Vc Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 15.06.24 13:47, Mario Marietto: > Ciao Oleksandr. > > I can't produce patches,I'm not a programmer. But I conduct > experiments every day,changing parameters,system files between > different FreeBSD versions,operating systems and tools. > > Can't you use virtio-net instead of passing through the physical > network interface,like this for example : -s 13,virtio-net,tap18 \ in > your bhyve guest ? > > You can try these bhyve versions : (try both) > > https://drive.google.com/drive/folders/14OMOjdyS5NPQ75ISatcpCWegU0udzG0r?usp=sharing > Unfortunately both of your vmm.ko modules fail to load on my system: KLD vmm.ko: depends on kernel - not available or version mismatch > On Sat, Jun 15, 2024 at 9:17 AM Oleksandr Kryvulia > <shuriku@shurik.kiev.ua> wrote: > > 14.06.24 10:50, Peter Grehan: > >> I don't know why bhyve validates the BAR size. The commit > adding this > >> check is old [1] and doesn't explain it. What bhyve could do is > >> rounding up the BAR size to a full page size when allocating > memory for > >> the BAR. > >> > >> [1] https://github.com/freebsd/freebsd- > >> src/commit/7a902ec0eccc752c9c38533ed123121eaaea1225 > > > > At the time, BIOSs would often place device BARs of less than a > page > > size in the same physical page. Since EPT only gives page > granularity, > > this would result in all those devices being available to the guest > > even if they hadn't been passed through. > > > Peter, can you explain how can I use this device in a guest without > passing through? > > > > > -- > Mario. --------------7snt0nwRoQ10iL18xHBQ35Vc Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> 15.06.24 13:47, Mario Marietto:<br> <blockquote type="cite" cite="mid:CA+1FSiiw3Y3Po=MiCPYM3a4-738uOO3daX0XNybQ9gBhwTB0OQ@mail.gmail.com"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <div dir="ltr"> <div>Ciao Oleksandr.</div> <div><br> </div> <div>I can't produce patches,I'm not a programmer. But I conduct experiments every day,changing parameters,system files between different FreeBSD versions,operating systems and tools. </div> <div><br> </div> <div>Can't you use virtio-net instead of passing through the physical network interface,like this for example : -s 13,virtio-net,tap18 \ in your bhyve guest ?</div> <div><br> </div> <div>You can try these bhyve versions : (try both)<br> </div> <div><br> </div> <div><a href="https://drive.google.com/drive/folders/14OMOjdyS5NPQ75ISatcpCWegU0udzG0r?usp=sharing" moz-do-not-send="true" class="moz-txt-link-freetext">https://drive.google.com/drive/folders/14OMOjdyS5NPQ75ISatcpCWegU0udzG0r?usp=sharing</a></div>; </div> <br> </blockquote> <span class="HwtZe" lang="en"><span class="jCAhz JxVs2d ChMk0b"><span class="ryNqvb">Unfortunately</span></span></span> both of your vmm.ko modules fail to load on my system:<br> <br> KLD vmm.ko: depends on kernel - not available or version mismatch <br> <br> <blockquote type="cite" cite="mid:CA+1FSiiw3Y3Po=MiCPYM3a4-738uOO3daX0XNybQ9gBhwTB0OQ@mail.gmail.com"> <div class="gmail_quote"> <div dir="ltr" class="gmail_attr">On Sat, Jun 15, 2024 at 9:17 AM Oleksandr Kryvulia <<a href="mailto:shuriku@shurik.kiev.ua" moz-do-not-send="true" class="moz-txt-link-freetext">shuriku@shurik.kiev.ua</a>> wrote:<br> </div> <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">14.06.24 10:50, Peter Grehan:<br> >> I don't know why bhyve validates the BAR size. The commit adding this<br> >> check is old [1] and doesn't explain it. What bhyve could do is<br> >> rounding up the BAR size to a full page size when allocating memory for<br> >> the BAR.<br> >><br> >> [1] <a href="https://github.com/freebsd/freebsd-" rel="noreferrer" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/freebsd/freebsd-</a><br>; >> src/commit/7a902ec0eccc752c9c38533ed123121eaaea1225<br> ><br> > At the time, BIOSs would often place device BARs of less than a page <br> > size in the same physical page. Since EPT only gives page granularity, <br> > this would result in all those devices being available to the guest <br> > even if they hadn't been passed through.<br> ><br> Peter, can you explain how can I use this device in a guest without <br> passing through?<br> <br> <br> </blockquote> </div> <br clear="all"> <br> <span class="gmail_signature_prefix">-- </span><br> <div dir="ltr" class="gmail_signature">Mario.<br> </div> </blockquote> <br> </body> </html> --------------7snt0nwRoQ10iL18xHBQ35Vc--
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