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MIPS: asm/tlb.h: Add UNIQUE_GUEST_ENTRYHI() macro

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Add a distinct UNIQUE_GUEST_ENTRYHI() macro for invalidation of guest
TLB entries by KVM, using addresses in KSeg1 rather than KSeg0. This
avoids conflicts with guest invalidation routines when there is no EHINV
bit to mark the whole entry as invalid, avoiding guest machine check
exceptions on Cavium Octeon III.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
This commit is contained in:
James Hogan 2017-03-14 10:15:13 +00:00
parent eb0bab3866
commit a6c09b9f9d
1 changed files with 4 additions and 2 deletions
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6
arch/mips/include/asm/tlb.h
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@ -21,9 +21,11 @@
*/
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
#define UNIQUE_ENTRYHI(idx) \
((CKSEG0 + ((idx) << (PAGE_SHIFT + 1))) | \
#define _UNIQUE_ENTRYHI(base, idx) \
(((base) + ((idx) << (PAGE_SHIFT + 1))) | \
(cpu_has_tlbinv ? MIPS_ENTRYHI_EHINV : 0))
#define UNIQUE_ENTRYHI(idx) _UNIQUE_ENTRYHI(CKSEG0, idx)
#define UNIQUE_GUEST_ENTRYHI(idx) _UNIQUE_ENTRYHI(CKSEG1, idx)
static inline unsigned int num_wired_entries(void)
{