Re: [PATCH 03/11] powerpc/kvm: Gather HPT related variables into sub-structure

On Fri, Dec 16, 2016 at 10:24:17AM +0100, Thomas Huth wrote:

On 15.12.2016 06:53, David Gibson wrote:

quoted

Currently, the powerpc kvm_arch structure contains a number of variables
tracking the state of the guest's hashed page table (HPT) in KVM HV.  This
patch gathers them all together into a single kvm_hpt_info substructure.
This makes life more convenient for the upcoming HPT resizing
implementation.

Signed-off-by: David Gibson <redacted>
---
 arch/powerpc/include/asm/kvm_host.h | 16 ++++---
 arch/powerpc/kvm/book3s_64_mmu_hv.c | 90 ++++++++++++++++++-------------------
 arch/powerpc/kvm/book3s_hv.c        |  2 +-
 arch/powerpc/kvm/book3s_hv_rm_mmu.c | 62 ++++++++++++-------------
 4 files changed, 87 insertions(+), 83 deletions(-)

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index e59b172..2673271 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h

@@ -241,12 +241,20 @@ struct kvm_arch_memory_slot {
 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
 };
 
+struct kvm_hpt_info {
+	unsigned long virt;
+	struct revmap_entry *rev;
+	unsigned long npte;
+	unsigned long mask;
+	u32 order;
+	int cma;
+};

While you're at it, it would be really great if you could add a comment
at the end of each line with a short description of what the variables
are about. E.g. if I just read "virt" and do not have much clue of the
code yet, I have a hard time to figure out what this means...

Good idea, done.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson