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lib: sbi: send a double trap SSE event to supervisor

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In case the double trap handler is called and the double trap happened
in supervisor mode, send a double trap SSE event.

NOTE: this commit depends on the ratification of the new SSE event
id for double trap [1].

Link: https://lists.riscv.org/g/tech-prs/message/985 [1]
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
This commit is contained in:
Clément Léger
2024-10-18 10:40:05 +02:00
committed by Anup Patel
parent 9c78593269
commit b0a7e4b853
3 changed files with 3 additions and 1 deletions
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1
include/sbi/sbi_ecall_interface.h
View File

@@ -382,6 +382,7 @@ enum sbi_sse_state {
/* SBI SSE Event IDs. */
#define SBI_SSE_EVENT_LOCAL_RAS 0x00000000
#define SBI_SSE_EVENT_LOCAL_DOUBLE_TRAP 0x00000001
#define SBI_SSE_EVENT_LOCAL_PLAT_0_START 0x00004000
#define SBI_SSE_EVENT_LOCAL_PLAT_0_END 0x00007fff
#define SBI_SSE_EVENT_GLOBAL_RAS 0x00008000

2
lib/sbi/sbi_double_trap.c
View File

@@ -26,5 +26,5 @@ int sbi_double_trap_handler(struct sbi_trap_context *tcntx)
if (prev_virt)
return sbi_trap_redirect(regs, trap);
return SBI_ENOTSUPP;
return sbi_sse_inject_event(SBI_SSE_EVENT_LOCAL_DOUBLE_TRAP);
}

1
lib/sbi/sbi_sse.c
View File

@@ -41,6 +41,7 @@
static const uint32_t supported_events[] = {
SBI_SSE_EVENT_LOCAL_RAS,
SBI_SSE_EVENT_LOCAL_DOUBLE_TRAP,
SBI_SSE_EVENT_GLOBAL_RAS,
SBI_SSE_EVENT_LOCAL_PMU,
SBI_SSE_EVENT_LOCAL_SOFTWARE,