hi,
Now I change my a configuration to:
* .platform_info = { .pci_mmconfig_base = 0xe0000000, // virt address
.pci_mmconfig_end_bus = 0, .pci_is_virtual = 1, .pci_domain = 1,*
* .............*
Then I didn’t see the error log
*[ 35.130190] pci-host-generic e0000000.pci: host bridge /pci@0 ranges:[
35.130241] pci-host-generic e0000000.pci: MEM
0x00e0100000..0x00e0101fff -> 0x00e0100000[ 35.130295] pci-host-generic
e0000000.pci: ECAM at [mem 0xe0000000-0xe00fffff] for [bus 00][
35.130457] pci-host-generic e0000000.pci: PCI host bridge to bus 0001:00[
35.130470] pci_bus 0001:00: root bus resource [bus 00][ 35.130480]
pci_bus 0001:00: root bus resource [mem 0xe0100000-0xe0101fff][
35.130519] pci 0001:00:00.0: [110a:4106] type 00 class 0xff0000[
35.130545] pci 0001:00:00.0: reg 0x10: [mem 0x00000000-0x00000fff][
35.137255] pci 0001:00:00.0: BAR 0: assigned [mem 0xe0100000-0xe0100fff]*
*[ 35.137602] The Jailhouse is opening.[ 35.251548] vcc3v3_lcd1_n:
disabling[ 35.285180] psci: CPU3 killed (polled 0 ms)*
Then I insert uio_ivshmem.ko (build from
https://github.com/henning-schild-work/ivshmem-guest-code/tree/jailhouse)
*[ 35.287908] Created Jailhouse cell "inmate-demo"[ 50.988039]
uio_ivshmem 0001:00:00.0: ivshmem_pci_proben[ 50.988085] uio_ivshmem
0001:00:00.0: enabling device (0000 -> 0002)[ 50.988548] uio_ivshmem
0001:00:00.0: using jailhouse mode*
Then run /usr/local/sbin/ivshmem-demo and it will show mmap failure.
ID = 0
Maximum peers = 3
/usr/local/sbin/ivshmem-demo: mmap(state): No such device
Why does mmap fail?
On Saturday, September 9, 2023 at 7:38:59 PM UTC+8 Ralf Ramsauer wrote:
>
>
> On 09/09/2023 08:04, bot crack wrote:
> > Hi, everybody
> >
> > I encountered some problems when using ivshmem-demo. How should I set
> > the value of pci_mmconfig_base?
>
> Set it to a region where it does physically not collide with any other
> IO/Memory.
>
> >
> > my rootcell:
> > /.platform_info = {
> > .pci_mmconfig_base = 0x7BC00000,
> > .pci_mmconfig_end_bus = 0,
> > .pci_is_virtual = 1,
> > .pci_domain = 1,
> > .arm = {
> > .gic_version = 3,/
> >
> > .......
> >
> >
> > my linux dts:
> > /&reserved_memory {
> >
> > jailhouse: jailhouse@0x70000000{
> > reg = <0x0 0x70000000 0x0 0xBC00000>;
> > alignment = <0x1000>;
> > no-map;
> > status = "okay";
> > };
> >
> > pci_reserved: pci@0x7BC00000{
> > reg = <0x0 0x7BC00000 0x0 0x00200000>;
> > alignment = <0x1000>;
> > no-map;
> > status = "okay";
> > };
>
> There's no need to reserve it via device tree, because it isn't backed
> with anything in any case.
>
> >
> > };
> > /
> > Kernel output after inserting jailhouse.ko
> > /[ 264.612191] jailhouse: loading out-of-tree module taints kernel.
> > [ 264.624958] pci-host-generic 7bc00000.pci: host bridge /pci@0 ranges:
> > [ 264.625007] pci-host-generic 7bc00000.pci: MEM
> > 0x007bd00000..0x007bd01fff -> 0x007bd00000
> > [ 264.625028] pci-host-generic 7bc00000.pci: *resource collision: [mem
> > 0x7bd00000-0x7bd01fff] conflicts with reserved [mem
> 0x70000000-0x7bdfffff]*
>
> This happens due to your device tree reservation. If there's nothing
> behind 0x7bc..., then simply go without reservation.
>
> > [ 264.625051] pci-host-generic: probe of 7bc00000.pci failed with error
> -12
> > [ 264.625475] The Jailhouse is opening.
> > [ 264.792429] psci: CPU3 killed (polled 0 ms)
> > [ 264.794210] Created Jailhouse cell "inmate-demo"
> > /
> > The operating environment is arm64, linux5.10.160
> >
> > *How should I set the value of pci_mmconfig_base?*
>
> See above, a free (ideally aligned) memory region in your physical
> address space.
>
> Ralf
>
> >
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> >
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>
> <
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>
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