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lib: sbi: Introduce sbi_trap_exit() API

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We introduce sbi_trap_exit() API which can help non-firmware
(i.e. generic or platform) code to force exit trap/interrupt
handling and resume execution at context pointed by parameter
"const struct sbi_trap_regs *regs".

This new sbi_trap_exit() API will help Keystone Enclave project
to resume execution of enclave from custom SBI call handler.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-12-29 11:39:22 +05:30
committed by Anup Patel
parent 80bc5065bb
commit b7df5e4392
4 changed files with 72 additions and 3 deletions
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include/sbi/sbi_trap.h
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@@ -207,6 +207,8 @@ int sbi_trap_redirect(struct sbi_trap_regs *regs,
void sbi_trap_handler(struct sbi_trap_regs *regs);
void __noreturn sbi_trap_exit(const struct sbi_trap_regs *regs);
#endif
#endif