1. 11 Jan, 2018 3 commits
  2. 10 Jan, 2018 2 commits
    • David Gibson's avatar
      KVM: PPC: Book3S HV: Always flush TLB in kvmppc_alloc_reset_hpt() · ecba8297
      David Gibson authored
      The KVM_PPC_ALLOCATE_HTAB ioctl(), implemented by kvmppc_alloc_reset_hpt()
      is supposed to completely clear and reset a guest's Hashed Page Table (HPT)
      allocating or re-allocating it if necessary.
      
      In the case where an HPT of the right size already exists and it just
      zeroes it, it forces a TLB flush on all guest CPUs, to remove any stale TLB
      entries loaded from the old HPT.
      
      However, that situation can arise when the HPT is resizing as well - or
      even when switching from an RPT to HPT - so those cases need a TLB flush as
      well.
      
      So, move the TLB flush to trigger in all cases except for errors.
      
      Cc: stable@vger.kernel.org # v4.10+
      Fixes: f98a8bf9 ("KVM: PPC: Book3S HV: Allow KVM_PPC_ALLOCATE_HTAB ioctl() to change HPT size")
      Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
      ecba8297
    • Alexey Kardashevskiy's avatar
      KVM: PPC: Book3S PR: Fix WIMG handling under pHyp · 6c7d47c3
      Alexey Kardashevskiy authored
      Commit 96df2267 ("KVM: PPC: Book3S PR: Preserve storage control bits")
      added code to preserve WIMG bits but it missed 2 special cases:
      - a magic page in kvmppc_mmu_book3s_64_xlate() and
      - guest real mode in kvmppc_handle_pagefault().
      
      For these ptes, WIMG was 0 and pHyp failed on these causing a guest to
      stop in the very beginning at NIP=0x100 (due to bd9166ff "KVM: PPC:
      Book3S PR: Exit KVM on failed mapping").
      
      According to LoPAPR v1.1 14.5.4.1.2 H_ENTER:
      
       The hypervisor checks that the WIMG bits within the PTE are appropriate
       for the physical page number else H_Parameter return. (For System Memory
       pages WIMG=0010, or, 1110 if the SAO option is enabled, and for IO pages
       WIMG=01**.)
      
      This hence initializes WIMG to non-zero value HPTE_R_M (0x10), as expected
      by pHyp.
      
      [paulus@ozlabs.org - fix compile for 32-bit]
      
      Cc: stable@vger.kernel.org # v4.11+
      Fixes: 96df2267 "KVM: PPC: Book3S PR: Preserve storage control bits"
      Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
      Tested-by: default avatarRuediger Oertel <ro@suse.de>
      Reviewed-by: default avatarGreg Kurz <groug@kaod.org>
      Tested-by: default avatarGreg Kurz <groug@kaod.org>
      Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
      6c7d47c3
  3. 07 Jan, 2018 8 commits
  4. 06 Jan, 2018 7 commits
  5. 05 Jan, 2018 20 commits