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lib: sbi: Introduce hart protection abstraction

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Currently, PMP and ePMP are the only hart protection mechanisms
available in OpenSBI but new protection mechanisms (such as Smmpt)
will be added in the near future.

To allow multiple hart protection mechanisms, introduce hart
protection abstraction and related APIs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20251209135235.423391-3-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2025-12-09 19:22:32 +05:30
committed by Anup Patel
parent 644a344226
commit 809df05c35
4 changed files with 202 additions and 0 deletions
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5
lib/sbi/sbi_init.c
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@@ -18,6 +18,7 @@
#include <sbi/sbi_fwft.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hartmask.h>
#include <sbi/sbi_hart_protection.h>
#include <sbi/sbi_heap.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_ipi.h>
@@ -74,6 +75,7 @@ static void sbi_boot_print_general(struct sbi_scratch *scratch)
const struct sbi_hsm_device *hdev;
const struct sbi_ipi_device *idev;
const struct sbi_timer_device *tdev;
const struct sbi_hart_protection *hprot;
const struct sbi_console_device *cdev;
const struct sbi_system_reset_device *srdev;
const struct sbi_system_suspend_device *susp_dev;
@@ -90,6 +92,9 @@ static void sbi_boot_print_general(struct sbi_scratch *scratch)
sbi_printf("Platform Features : %s\n", str);
sbi_printf("Platform HART Count : %u\n",
sbi_platform_hart_count(plat));
hprot = sbi_hart_protection_best();
sbi_printf("Platform HART Protection : %s\n",
(hprot) ? hprot->name : "---");
idev = sbi_ipi_get_device();
sbi_printf("Platform IPI Device : %s\n",
(idev) ? idev->name : "---");