diff mbox series

[PULL,14/14] target-ppc: Extend HWCAP2 bits for ISA 3.0

Message ID 20180907073155.26200-15-david@gibson.dropbear.id.au
State New
Headers show
Series [PULL,01/14] ppc: Remove deprecated ppcemb target | expand

Commit Message

David Gibson Sept. 7, 2018, 7:31 a.m. UTC 
From: Sandipan Das <sandipan@linux.ibm.com>

This adds the HWCAP2 bit to detect if a linux user process is
running on an ISA 3.0 compliant cpu like POWER9. This can be
verified using a simple test program that prints the value in
the auxiliary vector for AT_HWCAP2 as shown below.

Before:
  $ qemu-ppc64le -cpu power8 test
  0x8c000000

  $ qemu-ppc64le -cpu power9 test
  0x8c000000

After:
  $ qemu-ppc64le -cpu power8 test
  0x8c000000

  $ qemu-ppc64le -cpu power9 test
  0x8c800000

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 linux-user/elfload.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 8638612aec..e97c4cde49 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -710,6 +710,7 @@  enum {
     QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
     QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
     QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
+    QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
 };
 
 #define ELF_HWCAP get_elf_hwcap()
@@ -764,6 +765,7 @@  static uint32_t get_elf_hwcap2(void)
     GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
     GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
                   PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07);
+    GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00);
 
 #undef GET_FEATURE
 #undef GET_FEATURE2