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lib: Extend sbi_trap_redirect() for hypervisor extension

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When hypervisor extension is available, we can get traps from VS/VU
modes. We should be able to force redirect some of these traps to
HS-mode. In other words, we should be able forward traps from VS/VU
mode to HS-mode using sbi_trap_redirect() hence this patch.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel
2019-04-15 11:53:31 +05:30
committed by Anup Patel
parent 1a5614e971
commit bbeb8e619d
4 changed files with 156 additions and 26 deletions
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6
include/sbi/sbi_trap.h
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@@ -80,8 +80,10 @@
#define SBI_TRAP_REGS_mepc 32
/** Index of mstatus member in sbi_trap_regs */
#define SBI_TRAP_REGS_mstatus 33
/** Index of mstatusH member in sbi_trap_regs */
#define SBI_TRAP_REGS_mstatusH 34
/** Last member index in sbi_trap_regs */
#define SBI_TRAP_REGS_last 34
#define SBI_TRAP_REGS_last 35
/* clang-format on */
@@ -164,6 +166,8 @@ struct sbi_trap_regs {
unsigned long mepc;
/** mstatus register state */
unsigned long mstatus;
/** mstatusH register state (only for 32-bit) */
unsigned long mstatusH;
} __packed;
struct sbi_scratch;