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Re: [Xen-devel] how to disable build of pv-shim?
- To: Wei Liu <wei.liu2@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 14 May 2019 10:37:14 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Olaf Hering <olaf@xxxxxxxxx>
- Delivery-date: Tue, 14 May 2019 09:37:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 14/05/2019 10:23, Wei Liu wrote:
> On Tue, May 14, 2019 at 10:55:18AM +0200, Roger Pau Monné wrote:
>> On Mon, May 13, 2019 at 04:28:12PM +0100, Wei Liu wrote:
>>> On Mon, May 13, 2019 at 05:20:05PM +0200, Roger Pau Monné wrote:
>>>> On Mon, May 13, 2019 at 04:53:21PM +0200, Olaf Hering wrote:
>>>>> What is the recommended way to disable CONFIG_PV_SHIM, which is set in
>>>>> tools/firmware/Makefile? From my understanding there is no way to
>>>>> influence
>>>>> its value from outside, which means the build always enters xen-dir/.
>>>> I think the following should do the trick.
>>>>
>>>> Let me know if that works for you and I will submit it formally.
>>>>
>>>> Thanks!
>>>>
>>>> ---8<---
>>>> diff --git a/config/Tools.mk.in b/config/Tools.mk.in
>>>> index 98245f63c9..84ddb1a542 100644
>>>> --- a/config/Tools.mk.in
>>>> +++ b/config/Tools.mk.in
>>>> @@ -75,3 +75,5 @@ TINFO_LIBS := @TINFO_LIBS@
>>>> ARGP_LDFLAGS := @argp_ldflags@
>>>>
>>>> FILE_OFFSET_BITS := @FILE_OFFSET_BITS@
>>>> +
>>>> +CONFIG_PV_SHIM := @pvshim@
>>>> diff --git a/tools/configure.ac b/tools/configure.ac
>>>> index c9fd69ddfa..8df2fd604b 100644
>>>> --- a/tools/configure.ac
>>>> +++ b/tools/configure.ac
>>>> @@ -492,4 +492,15 @@ AC_ARG_ENABLE([9pfs],
>>>>
>>>> AC_SUBST(ninepfs)
>>>>
>>>> +AC_ARG_ENABLE([pvshim],
>>>> + AS_HELP_STRING([--disable-pvshim], [Disable pvshim build (x86 only,
>>>> enabled by default)]),
>>>> + [AS_IF([test "x$enable_pvshim" = "xno"], [pvshim=n], [pvshim=y])], [
>>>> + case "$host_cpu" in
>>>> + i[[3456]]86|x86_64)
>>>> + pvshim="y";;
>>> Since xen doesn't build on 32bit anymore you may want to exclude
>>> i[3456]86 here?
>> Oh, I didn't realize this. Is it true for all distros?
> FAOD I was thinking about 32bit xen support. But I just realise since
> you tested host_cpu here, maybe you intended to do a cross-build?
>
> I have never tested cross-building 64bit xen on a 32bit platform...
XenServer used this for many years when we had a 64bit Xen and 32bit
dom0. It works fine (or did last time I checked, and I have no reason
to expect that we've broken it).
~Andrew
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