* Apply dbaee836d60a8 to linux-5.10.y
@ 2024-08-27 22:21 Nathan Chancellor
2024-08-29 16:19 ` Greg Kroah-Hartman
0 siblings, 1 reply; 2+ messages in thread
From: Nathan Chancellor @ 2024-08-27 22:21 UTC (permalink / raw)
To: Greg Kroah-Hartman, Sasha Levin; +Cc: stable, llvm
Hi Greg and Sasha,
Please apply commit dbaee836d60a ("KVM: arm64: Don't use cbz/adr with
external symbols") to linux-5.10.y, as a recent LLVM optimization around
__cold functions [1] can cause hyp_panic() to be too far away from
__guest_enter(), resulting in the same error that occurred with LTO (for
the same reason):
ld.lld: error: arch/arm64/built-in.a(kvm/hyp/entry.o):(function __guest_enter: .text+0x120): relocation R_AARCH64_CONDBR19 out of range: 14339212 is not in [-1048576, 1048575]; references 'hyp_panic'
>>> referenced by entry.S:88 (arch/arm64/kvm/hyp/vhe/../entry.S:88)
>>> defined in arch/arm64/built-in.a(kvm/hyp/vhe/switch.o)
ld.lld: error: arch/arm64/built-in.a(kvm/hyp/entry.o):(function __guest_enter: .text+0x134): relocation R_AARCH64_ADR_PREL_LO21 out of range: 14339192 is not in [-1048576, 1048575]; references 'hyp_panic'
>>> referenced by entry.S:97 (arch/arm64/kvm/hyp/vhe/../entry.S:97)
>>> defined in arch/arm64/built-in.a(kvm/hyp/vhe/switch.o)
It applies cleanly with 'patch -p1' and I have verified that it fixes
the issue.
[1]: https://github.com/llvm/llvm-project/commit/6b11573b8c5e3d36beee099dbe7347c2a007bf53
Cheers,
Nathan
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Apply dbaee836d60a8 to linux-5.10.y
2024-08-27 22:21 Apply dbaee836d60a8 to linux-5.10.y Nathan Chancellor
@ 2024-08-29 16:19 ` Greg Kroah-Hartman
0 siblings, 0 replies; 2+ messages in thread
From: Greg Kroah-Hartman @ 2024-08-29 16:19 UTC (permalink / raw)
To: Nathan Chancellor; +Cc: Sasha Levin, stable, llvm
On Tue, Aug 27, 2024 at 03:21:59PM -0700, Nathan Chancellor wrote:
> Hi Greg and Sasha,
>
> Please apply commit dbaee836d60a ("KVM: arm64: Don't use cbz/adr with
> external symbols") to linux-5.10.y, as a recent LLVM optimization around
> __cold functions [1] can cause hyp_panic() to be too far away from
> __guest_enter(), resulting in the same error that occurred with LTO (for
> the same reason):
>
> ld.lld: error: arch/arm64/built-in.a(kvm/hyp/entry.o):(function __guest_enter: .text+0x120): relocation R_AARCH64_CONDBR19 out of range: 14339212 is not in [-1048576, 1048575]; references 'hyp_panic'
> >>> referenced by entry.S:88 (arch/arm64/kvm/hyp/vhe/../entry.S:88)
> >>> defined in arch/arm64/built-in.a(kvm/hyp/vhe/switch.o)
>
> ld.lld: error: arch/arm64/built-in.a(kvm/hyp/entry.o):(function __guest_enter: .text+0x134): relocation R_AARCH64_ADR_PREL_LO21 out of range: 14339192 is not in [-1048576, 1048575]; references 'hyp_panic'
> >>> referenced by entry.S:97 (arch/arm64/kvm/hyp/vhe/../entry.S:97)
> >>> defined in arch/arm64/built-in.a(kvm/hyp/vhe/switch.o)
>
> It applies cleanly with 'patch -p1' and I have verified that it fixes
> the issue.
>
> [1]: https://github.com/llvm/llvm-project/commit/6b11573b8c5e3d36beee099dbe7347c2a007bf53
Now queued up, thanks.
greg k-h
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2024-08-29 16:19 ` Greg Kroah-Hartman
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