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lib: sbi: check A2 register in ecall_dbcn_handler.

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Do not ignore register A2 (high bits of physical address) in the dbcn
handler (RV64).

Signed-off-by: Gianluca Guida <gianluca@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Gianluca Guida 2023-06-22 18:38:59 +01:00 • committed by Anup Patel
parent 27c957a43b
commit 8bd666a25b
1 changed files with 5 additions and 2 deletions
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7
lib/sbi/sbi_ecall_dbcn.c
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@ -34,11 +34,14 @@ static int sbi_ecall_dbcn_handler(unsigned long extid, unsigned long funcid,
* Based on above, we simply fail if the upper 32bits of
* the physical address (i.e. a2 register) is non-zero on
* RV32.
*
* Analogously, we fail if the upper 64bit of the
* physical address (i.e. a2 register) is non-zero on
* RV64.
*/
#if __riscv_xlen == 32
if (regs->a2)
return SBI_ERR_FAILED;
#endif
if (!sbi_domain_check_addr_range(sbi_domain_thishart_ptr(),
regs->a1, regs->a0, smode,
SBI_DOMAIN_READ|SBI_DOMAIN_WRITE))