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include: sbi: Add Smepmp specific access flags for PMP entries

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Smepmp specification defines a truth table based on which the access is allowed to
different modes. This patch adds different flags based on this truth table.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Himanshu Chauhan
2023-07-12 10:04:29 +05:30
committed by Anup Patel
parent 1c099c4f36
commit 6c202c5efd
1 changed files with 78 additions and 6 deletions
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84
include/sbi/sbi_domain.h
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@@ -43,6 +43,84 @@ struct sbi_domain_memregion {
#define SBI_DOMAIN_MEMREGION_SU_WRITABLE (1UL << 4)
#define SBI_DOMAIN_MEMREGION_SU_EXECUTABLE (1UL << 5)
#define SBI_DOMAIN_MEMREGION_ACCESS_MASK (0x3fUL)
#define SBI_DOMAIN_MEMREGION_M_ACCESS_MASK (0x7UL)
#define SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK (0x38UL)
#define SBI_DOMAIN_MEMREGION_SU_ACCESS_SHIFT (3)
#define SBI_DOMAIN_MEMREGION_SHARED_RDONLY \
(SBI_DOMAIN_MEMREGION_M_READABLE | \
SBI_DOMAIN_MEMREGION_SU_READABLE)
#define SBI_DOMAIN_MEMREGION_SHARED_SUX_MRX \
(SBI_DOMAIN_MEMREGION_M_READABLE | \
SBI_DOMAIN_MEMREGION_M_EXECUTABLE | \
SBI_DOMAIN_MEMREGION_SU_EXECUTABLE)
#define SBI_DOMAIN_MEMREGION_SHARED_SUX_MX \
(SBI_DOMAIN_MEMREGION_M_EXECUTABLE | \
SBI_DOMAIN_MEMREGION_SU_EXECUTABLE)
#define SBI_DOMAIN_MEMREGION_SHARED_SURW_MRW \
(SBI_DOMAIN_MEMREGION_M_READABLE | \
SBI_DOMAIN_MEMREGION_M_WRITABLE | \
SBI_DOMAIN_MEMREGION_SU_READABLE| \
SBI_DOMAIN_MEMREGION_SU_WRITABLE)
#define SBI_DOMAIN_MEMREGION_SHARED_SUR_MRW \
(SBI_DOMAIN_MEMREGION_M_READABLE | \
SBI_DOMAIN_MEMREGION_M_WRITABLE | \
SBI_DOMAIN_MEMREGION_SU_READABLE)
/* Shared read-only region between M and SU mode */
#define SBI_DOMAIN_MEMREGION_IS_SUR_MR(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_SU_READABLE))
/* Shared region: SU execute-only and M read/execute */
#define SBI_DOMAIN_MEMREGION_IS_SUX_MRX(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_M_EXECUTABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE))
/* Shared region: SU and M execute-only */
#define SBI_DOMAIN_MEMREGION_IS_SUX_MX(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_EXECUTABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE))
/* Shared region: SU and M read/write */
#define SBI_DOMAIN_MEMREGION_IS_SURW_MRW(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_M_WRITABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_SU_READABLE) & \
(__flags & SBI_DOMAIN_MEMREGION_SU_WRITABLE))
/* Shared region: SU read-only and M read/write */
#define SBI_DOMAIN_MEMREGION_IS_SUR_MRW(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_READABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_M_WRITABLE) && \
(__flags & SBI_DOMAIN_MEMREGION_SU_READABLE))
/*
* Check if region flags match with any of the above
* mentioned shared region type
*/
#define SBI_DOMAIN_MEMREGION_IS_SHARED(_flags) \
(SBI_DOMAIN_MEMREGION_IS_SUR_MR(_flags) || \
SBI_DOMAIN_MEMREGION_IS_SUX_MRX(_flags) || \
SBI_DOMAIN_MEMREGION_IS_SUX_MX(_flags) || \
SBI_DOMAIN_MEMREGION_IS_SURW_MRW(_flags)|| \
SBI_DOMAIN_MEMREGION_IS_SUR_MRW(_flags))
#define SBI_DOMAIN_MEMREGION_M_ONLY_ACCESS(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_M_ACCESS_MASK) && \
!(__flags & SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK))
#define SBI_DOMAIN_MEMREGION_SU_ONLY_ACCESS(__flags) \
((__flags & SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK) && \
!(__flags & SBI_DOMAIN_MEMREGION_M_ACCESS_MASK))
/** Bit to control if permissions are enforced on all modes */
#define SBI_DOMAIN_MEMREGION_ENF_PERMISSIONS (1UL << 6)
@@ -78,12 +156,6 @@ struct sbi_domain_memregion {
(SBI_DOMAIN_MEMREGION_SU_EXECUTABLE | \
SBI_DOMAIN_MEMREGION_M_EXECUTABLE)
#define SBI_DOMAIN_MEMREGION_ACCESS_MASK (0x3fUL)
#define SBI_DOMAIN_MEMREGION_M_ACCESS_MASK (0x7UL)
#define SBI_DOMAIN_MEMREGION_SU_ACCESS_MASK (0x38UL)
#define SBI_DOMAIN_MEMREGION_SU_ACCESS_SHIFT (3)
#define SBI_DOMAIN_MEMREGION_MMIO (1UL << 31)
unsigned long flags;
};