Re: [PATCH v4 12/15] KVM: arm64: nv: Add emulation for ERETAx instructions

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On 23/04/2024 12:42, Marc Zyngier wrote:
On Tue, 23 Apr 2024 10:40:22 +0100,
Zenghui Yu <yuzenghui@xxxxxxxxxx> wrote:

On 2024/4/23 17:22, Jon Hunter wrote:

Some of our builders currently have an older version of GCC (v6) and
after this change I am seeing ...

    CC      arch/arm64/kvm/pauth.o
/tmp/ccohst0v.s: Assembler messages:
/tmp/ccohst0v.s:1177: Error: unknown architectural extension `pauth'
/tmp/ccohst0v.s:1177: Error: unknown mnemonic `pacga' -- `pacga x21,x22,x0'
/local/workdir/tegra/mlt-linux_next/kernel/scripts/Makefile.build:244:
recipe for target 'arch/arm64/kvm/pauth.o' failed
make[5]: *** [arch/arm64/kvm/pauth.o] Error 1
/local/workdir/tegra/mlt-linux_next/kernel/scripts/Makefile.build:485:
recipe for target 'arch/arm64/kvm' failed
make[4]: *** [arch/arm64/kvm] Error 2
/local/workdir/tegra/mlt-linux_next/kernel/scripts/Makefile.build:485:
recipe for target 'arch/arm64' failed
make[3]: *** [arch/arm64] Error 2


I know this is pretty old now and I am trying to get these builders
updated. However, the kernel docs still show that GCC v5.1 is
supported [0].

Was just looking at the discussion [1] ;-) . FYI there is already a
patch on the list [2] which should be merged soon.

Indeed. -next as of today already has the fix, although I'm reworking
it to take Mark's remarks into account.

Jon, can you confirm that next-20240423 builds with your setup?


Yes that is building fine today too. Thanks!

Feel free to add my ...

Tested-by: Jon Hunter <jonathanh@xxxxxxxxxx>

Jon

--
nvpublic




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