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linux-user: elf: ELF_HWCAP for s390x

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Let's add all HWCAPs that we can support under TCG right now, when the
respective CPU facilities are enabled.

Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Laurent Vivier <laurent@vivier.eu>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Laurent Vivier <laurent@vivier.eu>
Cc: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-06-04 11:30:07 +02:00
parent 37c70c43dc
commit 6d88baf186
2 changed files with 29 additions and 0 deletions
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1
include/elf.h
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@ -598,6 +598,7 @@ typedef struct {
#define HWCAP_S390_ETF3EH 256
#define HWCAP_S390_HIGH_GPRS 512
#define HWCAP_S390_TE 1024
#define HWCAP_S390_VXRS 2048
/* M68K specific definitions. */
/* We use the top 24 bits to encode information about the

28
linux-user/elfload.c
View File

@ -1308,6 +1308,34 @@ static inline void init_thread(struct target_pt_regs *regs,
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_S390
#include "elf.h"
#define ELF_HWCAP get_elf_hwcap()
#define GET_FEATURE(_feat, _hwcap) \
do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0)
static uint32_t get_elf_hwcap(void)
{
/*
* Let's assume we always have esan3 and zarch.
* 31-bit processes can use 64-bit registers (high gprs).
*/
uint32_t hwcap = HWCAP_S390_ESAN3 | HWCAP_S390_ZARCH | HWCAP_S390_HIGH_GPRS;
GET_FEATURE(S390_FEAT_STFLE, HWCAP_S390_STFLE);
GET_FEATURE(S390_FEAT_MSA, HWCAP_S390_MSA);
GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT, HWCAP_S390_LDISP);
GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE, HWCAP_S390_EIMM);
if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3) &&
s390_has_feat(S390_FEAT_ETF3_ENH)) {
hwcap |= HWCAP_S390_ETF3EH;
}
GET_FEATURE(S390_FEAT_VECTOR, HWCAP_S390_VXRS);
return hwcap;
}
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->psw.addr = infop->entry;