Re: [PATCH v5 03/19] arm64: rsi: Add RSI definitions
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2024-08-26 10:01:44
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On Mon, Aug 19, 2024 at 02:19:08PM +0100, Steven Price wrote:
From: Suzuki K Poulose <suzuki.poulose@arm.com> The RMM (Realm Management Monitor) provides functionality that can be accessed by a realm guest through SMC (Realm Services Interface) calls. The SMC definitions are based on DEN0137[1] version 1.0-rel0-rc1. [1] https://developer.arm.com/-/cdn-downloads/permalink/PDF/Architectures/DEN0137_1.0-rel0-rc1_rmm-arch_external.pdf Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Steven Price <steven.price@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> (I did cross-check the definitions with the spec)
+struct realm_config {
+ union {
+ struct {
+ unsigned long ipa_bits; /* Width of IPA in bits */
+ unsigned long hash_algo; /* Hash algorithm */
+ };
+ u8 pad[0x200];
+ };
+ union {
+ u8 rpv[64]; /* Realm Personalization Value */
+ u8 pad2[0xe00];
+ };
+ /*
+ * The RMM requires the configuration structure to be aligned to a 4k
+ * boundary, ensure this happens by aligning this structure.
+ */
+} __aligned(0x1000);It might have been easier to just write the pad sizes in decimal (trying to figure out what 0xe00 is ;)). Anyway, it's fine like this as well. -- Catalin