SVE/SVE2 issue on Cortex-A320 example

Dear ARM support,

I am currently exploring the Cortex-A320 core and have downloaded the startup_Cortex-A320x1 example for experimentation. To evaluate the functionality of SVE/SVE2 intrinsics, I added a small test snippet using basic SVE instructions.

#include <stdlib.h>
#include <stdio.h>

#include <arm_sve.h>
#include <arm_neon.h>

#ifdef USE_SERIAL_PORT
  #include "uart.h"
#endif

#ifdef USE_SERIAL_PORT
extern void UartInit(void);
#endif


// declaration of 'extern' functions
extern void init_timer(void);    // in timer_interrupts.c


__attribute__((noreturn)) int main(void)
{
#ifdef USE_SERIAL_PORT
    UartInit();
#endif

    printf("\nArmv9-A single-core startup code example, using Arm Compiler for Embedded 6\n\n");
    init_timer();

#if 1
    uint8_t __attribute__((aligned(16))) data[64] = {0} ;
	uint8_t* unaligned_ptr = data ;

	printf("\n\rorig: %d\n\r", ((int32_t*)unaligned_ptr)[0]);

	int32x4_t v_neon = vld1q_s32((int32_t*)unaligned_ptr);
	v_neon = vaddq_s32(v_neon, vdupq_n_s32(1));
	vst1q_s32((int32_t*)unaligned_ptr, v_neon);

	printf("\n\rneon: %d\n\r", ((int32_t*)unaligned_ptr)[0]);

	svbool_t pg = svptrue_b32();

	svint32_t v_sve = svld1_s32(pg, (int32_t*)unaligned_ptr);
	v_sve = svadd_s32_m(pg, v_sve, svdup_s32(1));
	svst1_s32(pg, (int32_t*)unaligned_ptr, v_sve);

	printf("\n\rsve: %d\n\r", ((int32_t*)unaligned_ptr)[0]);
#endif

    for(;;) { asm volatile ("WFI"); } // loop forever
}

However, during execution, the core enters an exception state immediately upon encountering the first SVE instruction (svld1_s32).

//
// Current EL with SPx
//
    .balign 0x80
cxsync1: B cxsync1

Could you please advise:

  1. Why the exception occurs on the SVE instruction?

  2. How to properly enable SVE/SVE2 support on the Cortex-A320 using the provided FVP simulator and example setup?

I am using the FVP configuration that came with the example mentioned above. Any guidance on configuring the vector length or enabling necessary system registers would also be appreciated.

Thank you in advance for your assistance.

Best regards,
Yevhenii