KVM: x86/mmu: count KVM mmu usage in secondary pagetable stats.

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Count the pages used by KVM mmu on x86 in memory stats under secondary
pagetable stats (e.g. "SecPageTables" in /proc/meminfo) to give better
visibility into the memory consumption of KVM mmu in a similar way to
how normal user page tables are accounted.

Add the inner helper in common KVM, ARM will also use it to count stats
in a future commit.

Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Acked-by: Marc Zyngier <maz@kernel.org> # generic KVM changes
Link: https://lore.kernel.org/r/20220823004639.2387269-3-yosryahmed@google.com
Link: https://lore.kernel.org/r/20220823004639.2387269-4-yosryahmed@google.com
[sean: squash x86 usage to workaround modpost issues]
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Yosry Ahmed 2022-08-23 00:46:37 +00:00 • committed by Sean Christopherson

parent ebc97a52b5

commit 43a063cab3

3 changed files with 39 additions and 2 deletions

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16

arch/x86/kvm/mmu/mmu.c

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12

arch/x86/kvm/mmu/tdp_mmu.c

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13

include/linux/kvm_host.h

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