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  1. Nov 27, 2020
  3. Nov 20, 2020
    • Sean Christopherson's avatar
      MAINTAINERS: Update email address for Sean Christopherson · c2b1209d
      Sean Christopherson authored 
      

Update my email address to one provided by my new benefactor.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: kvm@vger.kernel.org
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <20201119183707.291864-1-sean.kvm@gmail.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      c2b1209d
  5. Nov 19, 2020
  7. Nov 18, 2020
  9. Nov 17, 2020
  11. Nov 16, 2020
    • Jamie Iles's avatar
      KVM: arm64: Correctly align nVHE percpu data · 7bab16a6
      Jamie Iles authored 
      The nVHE percpu data is partially linked but the nVHE linker script did
not align the percpu section.  The PERCPU_INPUT macro would then align
the data to a page boundary:

  #define PERCPU_INPUT(cacheline)					\
  	__per_cpu_start = .;						\
  	*(.data..percpu..first)						\
  	. = ALIGN(PAGE_SIZE);						\
  	*(.data..percpu..page_aligned)					\
  	. = ALIGN(cacheline);						\
  	*(.data..percpu..read_mostly)					\
  	. = ALIGN(cacheline);						\
  	*(.data..percpu)						\
  	*(.data..percpu..shared_aligned)				\
  	PERCPU_DECRYPTED_SECTION					\
  	__per_cpu_end = .;

but then when the final vmlinux linking happens the hypervisor percpu
data is included after page alignment and so the offsets potentially
don't match.  On my build I saw that the .hyp.data..percpu section was
at address 0x20 and then the percpu data would begin at 0x1000 (because
of the page alignment in PERCPU_INPUT), but when linked into vmlinux,
everything would be shifted down by 0x20 bytes.

This manifests as one of the CPUs getting lost when running
kvm-unit-tests or starting any VM and subsequent soft lockup on a Cortex
A72 device.

Fixes: 30c95391

 ("kvm: arm64: Set up hyp percpu data for nVHE")
Signed-off-by: default avatarJamie Iles <jamie@nuviainc.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Acked-by: default avatarDavid Brazdil <dbrazdil@google.com>
Cc: David Brazdil <dbrazdil@google.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201113150406.14314-1-jamie@nuviainc.com
      7bab16a6
  13. Nov 15, 2020
    • Paolo Bonzini's avatar
      kvm: mmu: fix is_tdp_mmu_check when the TDP MMU is not in use · c887c9b9
      Paolo Bonzini authored 
      

In some cases where shadow paging is in use, the root page will
be either mmu->pae_root or vcpu->arch.mmu->lm_root.  Then it will
not have an associated struct kvm_mmu_page, because it is allocated
with alloc_page instead of kvm_mmu_alloc_page.

Just return false quickly from is_tdp_mmu_root if the TDP MMU is
not in use, which also includes the case where shadow paging is
enabled.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      c887c9b9
  15. Nov 13, 2020
  17. Nov 12, 2020