linux-user/elfload: Introduce elf_hwcap_str() on s390x

It is required for implementing /proc/cpuinfo emulation.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230605113950.1169228-4-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 49ec9ccc944b59dadf5bc80fec7eff9da5cbb4a7..d80d68484b6982bded85c2ffa155631b76c76a58 100644 (file)
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -1605,6 +1605,33 @@ uint32_t get_elf_hwcap(void)
     return hwcap;
 }
 
+const char *elf_hwcap_str(uint32_t bit)
+{
+    static const char *hwcap_str[] = {
+        [HWCAP_S390_ESAN3]     = "esan3",
+        [HWCAP_S390_ZARCH]     = "zarch",
+        [HWCAP_S390_STFLE]     = "stfle",
+        [HWCAP_S390_MSA]       = "msa",
+        [HWCAP_S390_LDISP]     = "ldisp",
+        [HWCAP_S390_EIMM]      = "eimm",
+        [HWCAP_S390_DFP]       = "dfp",
+        [HWCAP_S390_HPAGE]     = "edat",
+        [HWCAP_S390_ETF3EH]    = "etf3eh",
+        [HWCAP_S390_HIGH_GPRS] = "highgprs",
+        [HWCAP_S390_TE]        = "te",
+        [HWCAP_S390_VXRS]      = "vx",
+        [HWCAP_S390_VXRS_BCD]  = "vxd",
+        [HWCAP_S390_VXRS_EXT]  = "vxe",
+        [HWCAP_S390_GS]        = "gs",
+        [HWCAP_S390_VXRS_EXT2] = "vxe2",
+        [HWCAP_S390_VXRS_PDE]  = "vxp",
+        [HWCAP_S390_SORT]      = "sort",
+        [HWCAP_S390_DFLT]      = "dflt",
+    };
+
+    return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL;
+}
+
 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
 {
     regs->psw.addr = infop->entry;

diff --git a/linux-user/loader.h b/linux-user/loader.h
index ad6ca9dbe3598d5d5edcbd1b59060f53e8956da0..59cbeacf24f47abc0c1db3aba1ade60ee67ca8ab 100644 (file)
--- a/linux-user/loader.h
+++ b/linux-user/loader.h
@@ -58,6 +58,7 @@ extern unsigned long guest_stack_size;
 
 #ifdef TARGET_S390X
 uint32_t get_elf_hwcap(void);
+const char *elf_hwcap_str(uint32_t bit);
 #endif
 
 #endif /* LINUX_USER_LOADER_H */