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An interesting feature of the Arm architecture is that the stage-1 MMU supports two distinct VA regions, controlled by TTBR{0,1}_EL1. As KVM selftests on arm64 only uses TTBR0_EL1, the VA space is constrained to [0, 2^(va_bits-1)). This is different from other architectures that allow for addressing low and high regions of the VA space from a single page table. KVM selftests' VA space allocator presumes the valid address range is split between low and high memory based the MSB, which of course is a poor match for arm64's TTBR0 region. Allow architectures to override the default VA space layout. Make use of the override to align vpages_valid with the behavior of TTBR0 on arm64. Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Message-Id: <20221207214809.489070-4-oliver.upton@linux.dev> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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gic.c | ||
gic_private.h | ||
gic_v3.c | ||
handlers.S | ||
processor.c | ||
spinlock.c | ||
ucall.c | ||
vgic.c |