linux-kernel - linux-next: manual merge of the tip tree with Linus' tree

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Date:   Mon, 12 Feb 2018 12:27:35 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        KarimAllah Ahmed <karahmed@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: linux-next: manual merge of the tip tree with Linus' tree

Hi all,

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

  arch/x86/kvm/vmx.c

between commit:

  c992384bde84 ("KVM: vmx: speed up MSR bitmap merge")

from Linus' tree and commit:

  ff37dc0cd96c ("KVM/nVMX: Set the CPU_BASED_USE_MSR_BITMAPS if we have a valid L02 MSR bitmap")

from the tip tree.

I fixed it up (I think - 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/x86/kvm/vmx.c
index f427723dc7db,91e3539cba02..000000000000
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@@ -10136,7 -10127,12 +10136,10 @@@ static void nested_get_vmcs12_pages(str
  			(unsigned long)(vmcs12->posted_intr_desc_addr &
  			(PAGE_SIZE - 1)));
  	}
- 	if (!nested_vmx_prepare_msr_bitmap(vcpu, vmcs12))
 -	if (cpu_has_vmx_msr_bitmap() &&
 -	    nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS) &&
 -	    nested_vmx_merge_msr_bitmap(vcpu, vmcs12))
++	if (nested_vmx_prepare_msr_bitmap(vcpu, vmcs12))
+ 		vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL,
+ 			      CPU_BASED_USE_MSR_BITMAPS);
+ 	else
  		vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL,
  				CPU_BASED_USE_MSR_BITMAPS);
  }
@@@ -10224,14 -10220,9 +10227,14 @@@ static inline bool nested_vmx_prepare_m
  	 *    updated to reflect this when L1 (or its L2s) actually write to
  	 *    the MSR.
  	 */
- 	bool pred_cmd = msr_write_intercepted_l01(vcpu, MSR_IA32_PRED_CMD);
- 	bool spec_ctrl = msr_write_intercepted_l01(vcpu, MSR_IA32_SPEC_CTRL);
+ 	bool pred_cmd = !msr_write_intercepted_l01(vcpu, MSR_IA32_PRED_CMD);
+ 	bool spec_ctrl = !msr_write_intercepted_l01(vcpu, MSR_IA32_SPEC_CTRL);
  
 +	/* Nothing to do if the MSR bitmap is not in use.  */
 +	if (!cpu_has_vmx_msr_bitmap() ||
 +	    !nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
 +		return false;
 +
  	if (!nested_cpu_has_virt_x2apic_mode(vmcs12) &&
  	    !pred_cmd && !spec_ctrl)
  		return false;