[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] xen/riscv: disable fpu
commit d1e67674591c262e7cedfcd42547a3f64caec251 Author: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> AuthorDate: Mon Mar 20 17:10:34 2023 +0100 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Mon Mar 20 17:10:34 2023 +0100 xen/riscv: disable fpu Disable FPU to detect illegal usage of floating point in kernel space. Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Bobby Eshleman <bobbyeshleman@xxxxxxxxx> --- xen/arch/riscv/riscv64/head.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/arch/riscv/riscv64/head.S b/xen/arch/riscv/riscv64/head.S index ffd95f9f89..52fa41c778 100644 --- a/xen/arch/riscv/riscv64/head.S +++ b/xen/arch/riscv/riscv64/head.S @@ -6,6 +6,13 @@ ENTRY(start) /* Mask all interrupts */ csrw CSR_SIE, zero + /* + * Disable FPU to detect illegal usage of + * floating point in kernel space + */ + li t0, SSTATUS_FS + csrc CSR_SSTATUS, t0 + la sp, cpu0_boot_stack li t0, STACK_SIZE add sp, sp, t0 -- generated by git-patchbot for /home/xen/git/xen.git#master
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