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include: sbi: Fine grain the permissions for M and SU modes

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Split the permissions for M-mode and SU-mode. This would
help if different sections of OpenSBI need to be given
different permissions and if M-mode has different permisssions
than the SU-mode over a region.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Himanshu Chauhan 2023-01-09 05:20:35 +00:00 • committed by Anup Patel
commit 9e0ba09076
1 changed files with 42 additions and 5 deletions

47
include/sbi/sbi_domain.h
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@ -36,11 +36,48 @@ struct sbi_domain_memregion {
*/
unsigned long base;
/** Flags representing memory region attributes */
#define SBI_DOMAIN_MEMREGION_READABLE (1UL << 0)
#define SBI_DOMAIN_MEMREGION_WRITEABLE (1UL << 1)
#define SBI_DOMAIN_MEMREGION_EXECUTABLE (1UL << 2)
#define SBI_DOMAIN_MEMREGION_MMODE (1UL << 3)
#define SBI_DOMAIN_MEMREGION_ACCESS_MASK (0xfUL)
#define SBI_DOMAIN_MEMREGION_M_READABLE (1UL << 0)
#define SBI_DOMAIN_MEMREGION_M_WRITABLE (1UL << 1)
#define SBI_DOMAIN_MEMREGION_M_EXECUTABLE (1UL << 2)
#define SBI_DOMAIN_MEMREGION_SU_READABLE (1UL << 3)
#define SBI_DOMAIN_MEMREGION_SU_WRITABLE (1UL << 4)
#define SBI_DOMAIN_MEMREGION_SU_EXECUTABLE (1UL << 5)
/** Bit to control if permissions are enforced on all modes */
#define SBI_DOMAIN_MEMREGION_ENF_PERMISSIONS (1UL << 6)
#define SBI_DOMAIN_MEMREGION_M_RWX \
(SBI_DOMAIN_MEMREGION_M_READABLE | \
SBI_DOMAIN_MEMREGION_M_WRITABLE | \
SBI_DOMAIN_MEMREGION_M_EXECUTABLE)
/* Unrestricted M-mode accesses but enfoced on SU-mode */
#define SBI_DOMAIN_MEMREGION_READABLE \
(SBI_DOMAIN_MEMREGION_SU_READABLE | \
SBI_DOMAIN_MEMREGION_M_RWX)
#define SBI_DOMAIN_MEMREGION_WRITEABLE \
(SBI_DOMAIN_MEMREGION_SU_WRITABLE | \
SBI_DOMAIN_MEMREGION_M_RWX)
#define SBI_DOMAIN_MEMREGION_EXECUTABLE \
(SBI_DOMAIN_MEMREGION_SU_EXECUTABLE | \
SBI_DOMAIN_MEMREGION_M_RWX)
/* Enforced accesses across all modes */
#define SBI_DOMAIN_MEMREGION_ENF_READABLE \
(SBI_DOMAIN_MEMREGION_SU_READABLE | \
SBI_DOMAIN_MEMREGION_M_READABLE)
#define SBI_DOMAIN_MEMREGION_ENF_WRITABLE \
(SBI_DOMAIN_MEMREGION_SU_WRITABLE | \
SBI_DOMAIN_MEMREGION_M_WRITABLE)
#define SBI_DOMAIN_MEMREGION_ENF_EXECUTABLE \
(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;