opensbi.git/lib/sbi/sbi_expected_trap.S, branch master

lib: sbi: expected trap must always clear MPRV

2025-12-26T10:52:09Z

Expected trap must always clear MPRV. Currently it doesn't. There is a security issue here where if firmware was doing ld/st with MPRV=1 and since there would be a expected trap, opensbi will continue to run as MPRV=1. Security impact is DoS where opensbi will just keep trapping. Signed-off-by: Deepak Gupta Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251124220339.3695940-1-debug@rivosinc.com Signed-off-by: Anup Patel

lib: sbi: Remove epc from struct sbi_trap_info

2024-03-19T06:01:16Z

In the only places this value is used, it duplicates mepc from struct sbi_trap_regs. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: Fix typo in comment

2022-10-23T04:49:28Z

%s/is is/is Signed-off-by: Yu Chien Peter Lin Reviewed-by: Anup Patel

lib: sbi_trap: Save mstatus[h].GVA in trap->gva

2022-08-22T03:19:39Z

The machine mode GVA field is available if the hypervisor extension is implemented, and indicates if mtval is a guest virtual address. Add a gva field to sbi_trap_info for this, and in __sbi_expected_trap_hext, save mstatus[h].GVA to it, so that gva indicates if tval is a guest virtual address. If the hypervisor extension is not implemented, always set gva to 0. Signed-off-by: Vivian Wang Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: Rename unprivileged trap handler

2020-05-10T04:29:16Z

Unprivileged trap handler can be reused for any cases where the executing code expects a trap. Rename it to "expected" trap handler as it will be used in other cases in future. Signed-off-by: Atish Patra Tested-by: Jonathan Balkind Reviewed-by: Anup Patel