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lib: sbi: Change the order of PMP initialization

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Configure PMP at last when all other initializations have been done.
Because if SMEPMP is detected, M-mode access to the S/U space will be
rescinded.

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 10:04:34 +05:30 • committed by Anup Patel
parent 4a42a2347c
commit f3fdd041ac
1 changed files with 17 additions and 9 deletions
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26
lib/sbi/sbi_init.c
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@ -356,13 +356,6 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
sbi_hart_hang();
}
rc = sbi_hart_pmp_configure(scratch);
if (rc) {
sbi_printf("%s: PMP configure failed (error %d)\n",
__func__, rc);
sbi_hart_hang();
}
/*
* Note: Platform final initialization should be after finalizing
* domains so that it sees correct domain assignment and PMP
@ -392,6 +385,17 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
sbi_boot_print_hart(scratch, hartid);
/*
* Configure PMP at last because if SMEPMP is detected,
* M-mode access to the S/U space will be rescinded.
*/
rc = sbi_hart_pmp_configure(scratch);
if (rc) {
sbi_printf("%s: PMP configure failed (error %d)\n",
__func__, rc);
sbi_hart_hang();
}
wake_coldboot_harts(scratch, hartid);
count = sbi_scratch_offset_ptr(scratch, init_count_offset);
@ -445,11 +449,15 @@ static void __noreturn init_warm_startup(struct sbi_scratch *scratch,
if (rc)
sbi_hart_hang();
rc = sbi_hart_pmp_configure(scratch);
rc = sbi_platform_final_init(plat, false);
if (rc)
sbi_hart_hang();
rc = sbi_platform_final_init(plat, false);
/*
* Configure PMP at last because if SMEPMP is detected,
* M-mode access to the S/U space will be rescinded.
*/
rc = sbi_hart_pmp_configure(scratch);
if (rc)
sbi_hart_hang();