diff options
| author | wchen <waylingii@gmail.com> | 2023-05-20 23:01:16 +0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-06-06 09:04:11 +0530 |
| commit | 19bff88e65b552f54c191e600498bd50ff47e1ef (patch) | |
| tree | b7b06a0ac002f1773476916f9d3c6079dadaba78 /arch/riscv/include/asm/csr.h | |
| parent | 78329084b86436b9a77cedd3e1331734c442d413 (diff) | |
| download | lwn-19bff88e65b552f54c191e600498bd50ff47e1ef.tar.gz lwn-19bff88e65b552f54c191e600498bd50ff47e1ef.zip | |
RISC-V: KVM: Redirect AMO load/store misaligned traps to guest
The M-mode redirects an unhandled misaligned trap back
to S-mode when not delegating it to VS-mode(hedeleg).
However, KVM running in HS-mode terminates the VS-mode
software when back from M-mode.
The KVM should redirect the trap back to VS-mode, and
let VS-mode trap handler decide the next step.
Here is a way to handle misaligned traps in KVM,
not only directing them to VS-mode or terminate it.
Signed-off-by: wchen <waylingII@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/include/asm/csr.h')
| -rw-r--r-- | arch/riscv/include/asm/csr.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index b6acb7ed115f..917814a0f99e 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -82,7 +82,9 @@ #define EXC_INST_ACCESS 1 #define EXC_INST_ILLEGAL 2 #define EXC_BREAKPOINT 3 +#define EXC_LOAD_MISALIGNED 4 #define EXC_LOAD_ACCESS 5 +#define EXC_STORE_MISALIGNED 6 #define EXC_STORE_ACCESS 7 #define EXC_SYSCALL 8 #define EXC_HYPERVISOR_SYSCALL 9 |