d02d06f8f1
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20230823065335.1919380-3-mjt@tls.msk.ru> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Host specific cpu identification for ppc.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "host/cpuinfo.h"
|
|
|
|
#ifdef CONFIG_GETAUXVAL
|
|
# include <sys/auxv.h>
|
|
#else
|
|
# include <asm/cputable.h>
|
|
# include "elf.h"
|
|
#endif
|
|
|
|
unsigned cpuinfo;
|
|
|
|
/* Called both as constructor and (possibly) via other constructors. */
|
|
unsigned __attribute__((constructor)) cpuinfo_init(void)
|
|
{
|
|
unsigned info = cpuinfo;
|
|
unsigned long hwcap, hwcap2;
|
|
|
|
if (info) {
|
|
return info;
|
|
}
|
|
|
|
hwcap = qemu_getauxval(AT_HWCAP);
|
|
hwcap2 = qemu_getauxval(AT_HWCAP2);
|
|
info = CPUINFO_ALWAYS;
|
|
|
|
/* Version numbers are monotonic, and so imply all lower versions. */
|
|
if (hwcap2 & PPC_FEATURE2_ARCH_3_1) {
|
|
info |= CPUINFO_V3_1 | CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
|
|
} else if (hwcap2 & PPC_FEATURE2_ARCH_3_00) {
|
|
info |= CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
|
|
} else if (hwcap2 & PPC_FEATURE2_ARCH_2_07) {
|
|
info |= CPUINFO_V2_07 | CPUINFO_V2_06;
|
|
} else if (hwcap & PPC_FEATURE_ARCH_2_06) {
|
|
info |= CPUINFO_V2_06;
|
|
}
|
|
|
|
if (hwcap2 & PPC_FEATURE2_HAS_ISEL) {
|
|
info |= CPUINFO_ISEL;
|
|
}
|
|
if (hwcap & PPC_FEATURE_HAS_ALTIVEC) {
|
|
info |= CPUINFO_ALTIVEC;
|
|
/* We only care about the portion of VSX that overlaps Altivec. */
|
|
if (hwcap & PPC_FEATURE_HAS_VSX) {
|
|
info |= CPUINFO_VSX;
|
|
/*
|
|
* We use VSX especially for little-endian, but we should
|
|
* always have both anyway, since VSX came with Power7
|
|
* and crypto came with Power8.
|
|
*/
|
|
if (hwcap2 & PPC_FEATURE2_HAS_VEC_CRYPTO) {
|
|
info |= CPUINFO_CRYPTO;
|
|
}
|
|
}
|
|
}
|
|
|
|
cpuinfo = info;
|
|
return info;
|
|
}
|