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[Qemu-devel] [PATCH] target-ppc: Extend HWCAP2 bits for ISA 3.0
From: |
Sandipan Das |
Subject: |
[Qemu-devel] [PATCH] target-ppc: Extend HWCAP2 bits for ISA 3.0 |
Date: |
Thu, 6 Sep 2018 12:27:29 +0530 |
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 <address@hidden>
---
linux-user/elfload.c | 2 ++
1 file changed, 2 insertions(+)
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
--
2.14.4
- [Qemu-devel] [PATCH] target-ppc: Extend HWCAP2 bits for ISA 3.0,
Sandipan Das <=