On Fri, Mar 03, 2023 at 12:24:22PM +0200, Oleksii Kurochko wrote: > Disable FPU to detect illegal usage of floating point in kernel > space. > > Signed-off-by: Oleksii Kurochko <oleksii.kuroc...@gmail.com> > --- > 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 > -- > 2.39.0 > >
My last email had the wrong trailer: Reviewed-by: Bobby Eshleman <bobbyeshle...@gmail.com>
