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

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Message-ID: <20200713144036.7afe4e76@canb.auug.org.au>
Date:   Mon, 13 Jul 2020 14:40:36 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Christoffer Dall <cdall@...columbia.edu>,
        Marc Zyngier <maz@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>, KVM <kvm@...r.kernel.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: linux-next: manual merge of the kvm-arm tree with the kvm tree

Hi all,

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

  arch/arm64/kvm/mmu.c

between commit:

  c1a33aebe91d ("KVM: arm64: Use common KVM implementation of MMU memory caches")

from the kvm tree and commit:

  a0e50aa3f4a8 ("KVM: arm64: Factor out stage 2 page table data from struct kvm")

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/kvm/mmu.c
index 838aad520f1c,cd14c831d56f..000000000000
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@@ -124,11 -127,44 +127,12 @@@ static void stage2_dissolve_pud(struct 
  	put_page(virt_to_page(pudp));
  }
  
- static void clear_stage2_pgd_entry(struct kvm *kvm, pgd_t *pgd, phys_addr_t addr)
 -static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache,
 -				  int min, int max)
 -{
 -	void *page;
 -
 -	BUG_ON(max > KVM_NR_MEM_OBJS);
 -	if (cache->nobjs >= min)
 -		return 0;
 -	while (cache->nobjs < max) {
 -		page = (void *)__get_free_page(GFP_PGTABLE_USER);
 -		if (!page)
 -			return -ENOMEM;
 -		cache->objects[cache->nobjs++] = page;
 -	}
 -	return 0;
 -}
 -
 -static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc)
 -{
 -	while (mc->nobjs)
 -		free_page((unsigned long)mc->objects[--mc->nobjs]);
 -}
 -
 -static void *mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc)
 -{
 -	void *p;
 -
 -	BUG_ON(!mc || !mc->nobjs);
 -	p = mc->objects[--mc->nobjs];
 -	return p;
 -}
 -
+ static void clear_stage2_pgd_entry(struct kvm_s2_mmu *mmu, pgd_t *pgd, phys_addr_t addr)
  {
+ 	struct kvm *kvm = mmu->kvm;
  	p4d_t *p4d_table __maybe_unused = stage2_p4d_offset(kvm, pgd, 0UL);
  	stage2_pgd_clear(kvm, pgd);
- 	kvm_tlb_flush_vmid_ipa(kvm, addr);
+ 	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
  	stage2_p4d_free(kvm, p4d_table);
  	put_page(virt_to_page(pgd));
  }

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