Date: Thu, 20 Oct 2022 11:43:23 +0100 From: Andrew Turner <andrew@fubar.geek.nz> To: Souradeep Chakrabarti <schakrabarti@microsoft.com> Cc: Warner Losh <imp@bsdimp.com>, "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Wei Hu <weh@microsoft.com> Subject: Re: [EXTERNAL] allocating IRQ mentioned in _CRS of ACPI Message-ID: <F4CD9D0B-980D-40E5-B17B-A1D87B46EA3C@fubar.geek.nz> In-Reply-To: <PSAP153MB0536D3DC3F8C7E37CC121C2ECC2B9@PSAP153MB0536.APCP153.PROD.OUTLOOK.COM> References: <PSAP153MB053667A618629ACFFDCEDCBFCC249@PSAP153MB0536.APCP153.PROD.OUTLOOK.COM> <PSAP153MB053698CAD8CB5439C99355B4CC249@PSAP153MB0536.APCP153.PROD.OUTLOOK.COM> <PSAP153MB053688DD7E9B60CE5AEB17A6CC289@PSAP153MB0536.APCP153.PROD.OUTLOOK.COM> <CANCZdfotdfuwK1t7efmh%2B_jNxjEJj4UmdrWhTVmUktZC9auzEQ@mail.gmail.com> <PSAP153MB0536D3DC3F8C7E37CC121C2ECC2B9@PSAP153MB0536.APCP153.PROD.OUTLOOK.COM>
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[-- Attachment #1 --]
Based on my reading of the ACPI tables, and looking how Linux handles it I don’t think the vmbus_res driver should be used. If the vmbus driver was to attach to the “VMBUS" _HID it would be able to manage the interrupt directly.
Ideally acpi_syscontainer would become a proper bus, but that would need checking that existing drivers that depend on the current behaviour still work.
Andrew
> On 19 Oct 2022, at 18:51, Souradeep Chakrabarti <schakrabarti@microsoft.com> wrote:
>
> Hi Warner,
>
> 1) PCI mmio resource in HID "ACPI0004", which is needed by the FreeBSD guest for SRIOV devices.
>
> Device (\_SB.VMOD) <-- This is currently owned by acpi_syscontainer module on FreeBSD
> {
> Name (_HID, "ACPI0004" /* Module Device */) // _HID: Hardware ID
> Name (_UID, Zero) // _UID: Unique ID
> Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings
> {
> ...
> }
> CreateDWordField (_CRS, \_SB.VMOD._Y00._MIN, MIN6) // _MIN: Minimum Base Address
> CreateDWordField (_CRS, \_SB.VMOD._Y00._MAX, MAX6) // _MAX: Maximum Base Address
> CreateDWordField (_CRS, \_SB.VMOD._Y00._LEN, LEN6) // _LEN: Length
> CreateQWordField (_CRS, \_SB.VMOD._Y01._MIN, MIN7) // _MIN: Minimum Base Address
> CreateQWordField (_CRS, \_SB.VMOD._Y01._MAX, MAX7) // _MAX: Maximum Base Address
> CreateQWordField (_CRS, \_SB.VMOD._Y01._LEN, LEN7) // _LEN: Length
> Method (_INI, 0, NotSerialized) // _INI: Initialize
> {
> MIN6 = MG2B /* \MG2B */
> LEN6 = MG2L /* \MG2L */
> Local0 = MG2L /* \MG2L */
> MAX6 = (MIN6 + Local0--)
> Local1 = (HMIB << 0x14)
> Local2 = (HMIL << 0x14)
> MIN7 = Local1
> LEN7 = Local2
> Local0 = Local2
> MAX7 = (MIN7 + Local0--)
> }
> }
>
> 2) Vmbus IRQ resource in HID "VMBus", which is needed to get Hyper-V vmbus interrupt to work on guests.
> Device (\_SB.VMOD.VMBS) <--- currently owned by vmbus_res module on FreeBSD
> {
> ...
> Name (_HID, "VMBus") // _HID: Hardware ID
> Name (_UID, Zero) // _UID: Unique ID
> ...
> Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings
> {
> Interrupt (ResourceConsumer, Edge, ActiveHigh, Exclusive, ,, )
> {
> 0x00000012,
> }
> })
> }
>
> <image001.png>
>
> Today I was able to get both IRQ and MMIO allocation successful using below snippet in vmbus:
>
> + device_t dev = devclass_get_device(devclass_find("vmbus_res"), 0);
> + sc->ires = bus_alloc_resource_any(dev,
> SYS_RES_IRQ, &sc->vector, RF_ACTIVE | RF_SHAREABLE);
>
>
> Thanks & Regards,
> Souradeep
>
> From: Warner Losh <imp@bsdimp.com>
> Sent: Wednesday, October 19, 2022 11:09 PM
> To: Souradeep Chakrabarti <schakrabarti@microsoft.com>
> Cc: freebsd-hackers@freebsd.org; Wei Hu <weh@microsoft.com>
> Subject: [EXTERNAL] Re: allocating IRQ mentioned in _CRS of ACPI
>
> Sorry for the late reply... I've been busy with some things for work...
>
> I think you'll need to get the parent of vmbus to allow a pass through allocation. What bus is that
> currently?
>
> Warner
>
> On Tue, Oct 18, 2022 at 12:33 PM Souradeep Chakrabarti <schakrabarti@microsoft.com <mailto:schakrabarti@microsoft.com>> wrote:
> Hi,
> It will be a great help, if someone can help here with some idea.
> As it is blocking the FreeBSD on Hyper-V ARM64.
>
> Thanks & Regards,
> Souradeep
>
> > -----Original Message-----
> > From: Souradeep Chakrabarti
> > Sent: Friday, October 14, 2022 1:24 PM
> > To: 'Warner Losh' <imp@bsdimp.com <mailto:imp@bsdimp.com>>
> > Cc: freebsd-hackers@freebsd.org <mailto:freebsd-hackers@freebsd.org>; Wei Hu <weh@microsoft.com <mailto:weh@microsoft.com>>
> > Subject: RE: allocating IRQ mentioned in _CRS of ACPI
> >
> > Last mail was having incorrect FreeBSD hacker alias. Replacing that with correct
> > one here.
> >
> >
> > > -----Original Message-----
> > > From: Souradeep Chakrabarti
> > > Sent: Friday, October 14, 2022 1:19 PM
> > > To: Warner Losh <imp@bsdimp.com <mailto:imp@bsdimp.com>>
> > > Cc: hacker@freebsd.org <mailto:hacker@freebsd.org>; Wei Hu <weh@microsoft.com <mailto:weh@microsoft.com>>
> > > Subject: allocating IRQ mentioned in _CRS of ACPI
> > >
> > > Hi,
> > > I would like to allocate IRQ to a device, mentioned in the _CRS of
> > > that device in ACPI table.
> > > I have tried with bus_alloc_resource_any(), but it is failing as the
> > > parent of that device is not owning the IRQ.
> > >
> > > Current ACPI topo for the device :
> > > ACPI0->SB.VMOD(HID ACPI0004, has SYS_RES_MEM for MMIO in _CRS)-
> > > >VMBUS( it has SYS_RES_IRQ in it's _CRS).
> > >
> > > How can I get here both SYS_RES_IRQ and SYS_RES_MEM allocated to VMBUS?
> > >
> > > Thanks & Regards,
> > > Souradeep
[-- Attachment #2 --]
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Based on my reading of the ACPI tables, and looking how Linux handles it I don’t think the vmbus_res driver should be used. If the vmbus driver was to attach to the “VMBUS" _HID it would be able to manage the interrupt directly.<div class=""><br class=""></div><div class="">Ideally acpi_syscontainer would become a proper bus, but that would need checking that existing drivers that depend on the current behaviour still work.<br class=""><div class=""><br class=""></div><div class="">Andrew<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 19 Oct 2022, at 18:51, Souradeep Chakrabarti <<a href="mailto:schakrabarti@microsoft.com" class="">schakrabarti@microsoft.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">Hi Warner,<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">1) PCI mmio resource in HID "ACPI0004", which is needed by the FreeBSD guest for SRIOV devices.<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Device (\_SB.VMOD) <-- This is currently owned by acpi_syscontainer module on FreeBSD<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_HID, "<span style="background-color: yellow;" class="">ACPI0004</span>" /* Module Device */) // _HID: Hardware ID<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_UID, Zero) // _UID: Unique ID<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> ...<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> }<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateDWordField (_CRS, \_SB.VMOD._Y00._MIN, MIN6) // _MIN: Minimum Base Address<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateDWordField (_CRS, \_SB.VMOD._Y00._MAX, MAX6) // _MAX: Maximum Base Address<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateDWordField (_CRS, \_SB.VMOD._Y00._LEN, LEN6) // _LEN: Length<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateQWordField (_CRS, \_SB.VMOD._Y01._MIN, MIN7) // _MIN: Minimum Base Address<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateQWordField (_CRS, \_SB.VMOD._Y01._MAX, MAX7) // _MAX: Maximum Base Address<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> CreateQWordField (_CRS, \_SB.VMOD._Y01._LEN, LEN7) // _LEN: Length<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Method (_INI, 0, NotSerialized) // _INI: Initialize<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> MIN6 = MG2B /* \MG2B */<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> LEN6 = MG2L /* \MG2L */<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Local0 = MG2L /* \MG2L */<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> MAX6 = (MIN6 + Local0--)<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Local1 = (HMIB << 0x14)<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Local2 = (HMIL << 0x14)<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> MIN7 = Local1<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> LEN7 = Local2<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Local0 = Local2<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> MAX7 = (MIN7 + Local0--)<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> }<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> }<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">2) Vmbus IRQ resource in HID "VMBus", which is needed to get Hyper-V vmbus interrupt to work on guests.<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Device (\_SB.VMOD.VMBS) <--- currently owned by vmbus_res module on FreeBSD<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> ...<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_HID, "<span style="background-color: yellow;" class="">VMBus</span>") // _HID: Hardware ID<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_UID, Zero) // _UID: Unique ID<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> ...<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> Interrupt (ResourceConsumer, Edge, ActiveHigh, Exclusive, ,, )<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> {<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> 0x00000012,<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> }<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> })<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> }<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><span id="cid:image001.png@01D8E411.80EECBE0"><image001.png></span></span><span class=""><o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">Today I was able to get both IRQ and MMIO allocation successful using below snippet in vmbus:<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">+ device_t dev = devclass_get_device(devclass_find("vmbus_res"), 0);<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">+ sc->ires = bus_alloc_resource_any(dev,<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> SYS_RES_IRQ, &sc->vector, RF_ACTIVE | RF_SHAREABLE);<o:p class=""></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class="">Thanks & Regards,<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class=""> Souradeep<o:p class=""></o:p></span></div></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="border-style: none none none solid; border-left-width: 1.5pt; border-left-color: blue; padding: 0cm 0cm 0cm 4pt;" class=""><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span lang="EN-US" class="">From:</span></b><span lang="EN-US" class=""><span class="Apple-converted-space"> </span>Warner Losh <<a href="mailto:imp@bsdimp.com" class="">imp@bsdimp.com</a>><span class="Apple-converted-space"> </span><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Wednesday, October 19, 2022 11:09 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Souradeep Chakrabarti <<a href="mailto:schakrabarti@microsoft.com" class="">schakrabarti@microsoft.com</a>><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:freebsd-hackers@freebsd.org" class="">freebsd-hackers@freebsd.org</a>; Wei Hu <<a href="mailto:weh@microsoft.com" class="">weh@microsoft.com</a>><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>[EXTERNAL] Re: allocating IRQ mentioned in _CRS of ACPI<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Sorry for the late reply... I've been busy with some things for work...<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">I think you'll need to get the parent of vmbus to allow a pass through allocation. What bus is that<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">currently?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Warner<o:p class=""></o:p></div></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">On Tue, Oct 18, 2022 at 12:33 PM Souradeep Chakrabarti <<a href="mailto:schakrabarti@microsoft.com" style="color: blue; text-decoration: underline;" class="">schakrabarti@microsoft.com</a>> wrote:<o:p class=""></o:p></div></div><blockquote style="border-style: none none none solid; border-left-width: 1pt; border-left-color: rgb(204, 204, 204); padding: 0cm 0cm 0cm 6pt; margin-left: 4.8pt; margin-right: 0cm;" class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hi,<br class="">It will be a great help, if someone can help here with some idea.<br class="">As it is blocking the FreeBSD on Hyper-V ARM64.<br class=""><br class="">Thanks & Regards,<br class="">Souradeep<br class=""><br class="">> -----Original Message-----<br class="">> From: Souradeep Chakrabarti<br class="">> Sent: Friday, October 14, 2022 1:24 PM<br class="">> To: 'Warner Losh' <<a href="mailto:imp@bsdimp.com" target="_blank" style="color: blue; text-decoration: underline;" class="">imp@bsdimp.com</a>><br class="">> Cc:<span class="Apple-converted-space"> </span><a href="mailto:freebsd-hackers@freebsd.org" target="_blank" style="color: blue; text-decoration: underline;" class="">freebsd-hackers@freebsd.org</a>; Wei Hu <<a href="mailto:weh@microsoft.com" target="_blank" style="color: blue; text-decoration: underline;" class="">weh@microsoft.com</a>><br class="">> Subject: RE: allocating IRQ mentioned in _CRS of ACPI<br class="">><span class="Apple-converted-space"> </span><br class="">> Last mail was having incorrect FreeBSD hacker alias. Replacing that with correct<br class="">> one here.<br class="">><span class="Apple-converted-space"> </span><br class="">><span class="Apple-converted-space"> </span><br class="">> > -----Original Message-----<br class="">> > From: Souradeep Chakrabarti<br class="">> > Sent: Friday, October 14, 2022 1:19 PM<br class="">> > To: Warner Losh <<a href="mailto:imp@bsdimp.com" target="_blank" style="color: blue; text-decoration: underline;" class="">imp@bsdimp.com</a>><br class="">> > Cc:<span class="Apple-converted-space"> </span><a href="mailto:hacker@freebsd.org" target="_blank" style="color: blue; text-decoration: underline;" class="">hacker@freebsd.org</a>; Wei Hu <<a href="mailto:weh@microsoft.com" target="_blank" style="color: blue; text-decoration: underline;" class="">weh@microsoft.com</a>><br class="">> > Subject: allocating IRQ mentioned in _CRS of ACPI<br class="">> ><br class="">> > Hi,<br class="">> > I would like to allocate IRQ to a device, mentioned in the _CRS of<br class="">> > that device in ACPI table.<br class="">> > I have tried with bus_alloc_resource_any(), but it is failing as the<br class="">> > parent of that device is not owning the IRQ.<br class="">> ><br class="">> > Current ACPI topo for the device :<br class="">> > ACPI0->SB.VMOD(HID ACPI0004, has SYS_RES_MEM for MMIO in _CRS)-<br class="">> > >VMBUS( it has SYS_RES_IRQ in it's _CRS).<br class="">> ><br class="">> > How can I get here both SYS_RES_IRQ and SYS_RES_MEM allocated to VMBUS?<br class="">> ><br class="">> > Thanks & Regards,<br class="">> > Souradeep</div></blockquote></div></div></div></div></div></blockquote></div><br class=""></div></div></body></html>
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