Commit 3f74b632 authored by Richard Henderson's avatar Richard Henderson
Browse files

target/ppc: Use qemu_guest_getrandom for DARN 



We now have an interface for guest visible random numbers.

Acked-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: default avatarLaurent Vivier <lvivier@redhat.com>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
parent 7e4357f6

target/ppc/int_helper.c

+26 −11
Original line number Diff line number Diff line
@@ -23,6 +23,8 @@ 
#include "exec/helper-proto.h"

#include "crypto/aes.h"

#include "fpu/softfloat.h"

#include "qapi/error.h"

#include "qemu/guest-random.h"



#include "helper_regs.h"

/*****************************************************************************/
@@ -158,24 +160,37 @@ uint32_t helper_cmpeqb(target_ulong ra, target_ulong rb) 
#undef hasvalue



/*

 * Return invalid random number.

 *

 * FIXME: Add rng backend or other mechanism to get cryptographically suitable

 * random number

 * Return a random number.

 */

target_ulong helper_darn32(void)

uint64_t helper_darn32(void)

{

    Error *err = NULL;

    uint32_t ret;



    if (qemu_guest_getrandom(&ret, sizeof(ret), &err) < 0) {

        qemu_log_mask(LOG_UNIMP, "darn: Crypto failure: %s",

                      error_get_pretty(err));

        error_free(err);

        return -1;

    }



target_ulong helper_darn64(void)

    return ret;

}



uint64_t helper_darn64(void)

{

    Error *err = NULL;

    uint64_t ret;



    if (qemu_guest_getrandom(&ret, sizeof(ret), &err) < 0) {

        qemu_log_mask(LOG_UNIMP, "darn: Crypto failure: %s",

                      error_get_pretty(err));

        error_free(err);

        return -1;

    }



#endif



#if defined(TARGET_PPC64)

    return ret;

}



uint64_t helper_bpermd(uint64_t rs, uint64_t rb)

{