linux-kernel - linux-next: manual merge of the kvm-arm tree with the arm64 tree

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Date:   Thu, 4 Oct 2018 14:07:37 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Christoffer Dall <cdall@...columbia.edu>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Anshuman Khandual <anshuman.khandual@....com>
Subject: linux-next: manual merge of the kvm-arm tree with the arm64 tree

Hi all,

Today's linux-next merge of the kvm-arm tree got a conflict in:

  arch/arm64/include/asm/cpufeature.h

between commit:

  520ad98871a0 ("arm64/cpufeatures: Factorize emulate_mrs()")

from the arm64 tree and commit:

  ce00e3cb4fb4 ("arm64: Add a helper for PARange to physical shift conversion")

from the kvm-arm tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc arch/arm64/include/asm/cpufeature.h
index 6db48d90ad63,072cc1c970c2..000000000000
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@@ -536,7 -530,26 +536,28 @@@ void arm64_set_ssbd_mitigation(bool sta
  static inline void arm64_set_ssbd_mitigation(bool state) {}
  #endif
  
+ static inline u32 id_aa64mmfr0_parange_to_phys_shift(int parange)
+ {
+ 	switch (parange) {
+ 	case 0: return 32;
+ 	case 1: return 36;
+ 	case 2: return 40;
+ 	case 3: return 42;
+ 	case 4: return 44;
+ 	case 5: return 48;
+ 	case 6: return 52;
+ 	/*
+ 	 * A future PE could use a value unknown to the kernel.
+ 	 * However, by the "D10.1.4 Principles of the ID scheme
+ 	 * for fields in ID registers", ARM DDI 0487C.a, any new
+ 	 * value is guaranteed to be higher than what we know already.
+ 	 * As a safe limit, we return the limit supported by the kernel.
+ 	 */
+ 	default: return CONFIG_ARM64_PA_BITS;
+ 	}
+ }
++
 +extern int do_emulate_mrs(struct pt_regs *regs, u32 sys_reg, u32 rt);
  #endif /* __ASSEMBLY__ */
  
  #endif

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