On Fri, 01 Jun 2018 22:26:19 +0100,
Catalin Marinas wrote:
>
> Hi Stefan,
>
> On Fri, Jun 01, 2018 at 10:05:07PM +0200, Stefan Wahren wrote:
> > i can't build todays linux-next-20180601 and get the following error message:
> >
> > arch/arm64/kvm/hyp/hyp-entry.S: Assembler messages:
> > arch/arm64/kvm/hyp/hyp-entry.S:128: Error: constant expression required at operand 3 -- `bfi x0,x1,#VCPU_WORKAROUND_2_FLAG_SHIFT,#1'
> >
> > Related commit:
> > arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests
> >
> > Toolchain: gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu
> > Kernel config: arm64/defconfig
>
> Thanks for reporting this.
>
> I can hit this as well. It looks like an #ifndef __ASSEMBLY__ in the
> wrong place in arch/arm64/include/asm/kvm_asm.h. I can't tell whether it
> was caused by a merge conflict resolution or just some unfortunate
> interaction between the security fixes going via the arm64 tree and the
> other arm64 KVM patches.
The merge between 55e3748e8902 in the arm64 tree, and both
fa89d31c5306 and 46c4a30b0b16 in the kvmarm tree has resulted in a
slight mis-merge which I didn't spot yesterday. Apologies for not
realising this myself.
Stephen, could you please add the following patchlet as a resolution
of the merge?
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index c5246d80b857..a169f3a88148 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -30,13 +30,13 @@
/* The hyp-stub will return this for any kvm_call_hyp() call */
#define ARM_EXCEPTION_HYP_GONE HVC_STUB_ERR
+#define VCPU_WORKAROUND_2_FLAG_SHIFT 0
+#define VCPU_WORKAROUND_2_FLAG (_AC(1, UL) << VCPU_WORKAROUND_2_FLAG_SHIFT)
+
#ifndef __ASSEMBLY__
#include <linux/mm.h>
-#define VCPU_WORKAROUND_2_FLAG_SHIFT 0
-#define VCPU_WORKAROUND_2_FLAG (_AC(1, UL) << VCPU_WORKAROUND_2_FLAG_SHIFT)
-
/* Translate a kernel address of @sym into its equivalent linear mapping */
#define kvm_ksym_ref(sym) \
({ \
Catalin: Alternatively, you could add a patch on top of the arm64
branch, moving these two defines to the top of the file, avoiding the
conflict altogether.
Thanks,
M.
--
Jazz is not dead, it just smell funny.
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