arm64: realm: Query IPA size from the RMM

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The top bit of the configured IPA size is used as an attribute to
control whether the address is protected or shared. Query the
configuration from the RMM to assertain which bit this is.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Co-developed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20241017131434.40935-4-steven.price@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Steven Price 2024-10-17 14:14:26 +01:00 • committed by Catalin Marinas

parent c077711f71

commit 3993069549

2 changed files with 12 additions and 0 deletions

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4

arch/arm64/include/asm/pgtable-prot.h

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8

arch/arm64/kernel/rsi.c

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