From 63c1b7de0a66e4ff248bdb51a0c3914de4eff034 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Mon, 30 Oct 2023 17:39:59 +0000 Subject: [PATCH] linux-user: Report AArch64 hwcap2 fields above bit 31 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The AArch64 ELF hwcap2 field is 64 bits, but our get_elf_hwcap2() works with uint32_t, so it accidentally fails to report any hwcaps over bit 31. Use uint64_t here. The Arm hwcap2 is only 32 bits (because the ELF format makes these fields be the size of "long" in the ABI), but since it shares the prototype declaration for get_elf_hwcap2() it is easier to also expand it to 64 bits. The only hwcap fields we implement already that are affected by this are the HBC and MOPS ones, neither of which were implemented in a previous release, so this doesn't need backporting to older stable branches. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-id: 20231030174000.3792225-3-peter.maydell@linaro.org --- linux-user/elfload.c | 8 ++++---- linux-user/loader.h | 2 +- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 3f3975352a..4cd6891d7b 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -552,10 +552,10 @@ uint32_t get_elf_hwcap(void) return hwcaps; } -uint32_t get_elf_hwcap2(void) +uint64_t get_elf_hwcap2(void) { ARMCPU *cpu = ARM_CPU(thread_cpu); - uint32_t hwcaps = 0; + uint64_t hwcaps = 0; GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES); GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL); @@ -818,10 +818,10 @@ uint32_t get_elf_hwcap(void) return hwcaps; } -uint32_t get_elf_hwcap2(void) +uint64_t get_elf_hwcap2(void) { ARMCPU *cpu = ARM_CPU(thread_cpu); - uint32_t hwcaps = 0; + uint64_t hwcaps = 0; GET_FEATURE_ID(aa64_dcpodp, ARM_HWCAP2_A64_DCPODP); GET_FEATURE_ID(aa64_sve2, ARM_HWCAP2_A64_SVE2); diff --git a/linux-user/loader.h b/linux-user/loader.h index a0834290e7..e102e6f410 100644 --- a/linux-user/loader.h +++ b/linux-user/loader.h @@ -103,7 +103,7 @@ uint32_t get_elf_hwcap(void); const char *elf_hwcap_str(uint32_t bit); #endif #if defined(TARGET_AARCH64) || defined(TARGET_ARM) -uint32_t get_elf_hwcap2(void); +uint64_t get_elf_hwcap2(void); const char *elf_hwcap2_str(uint32_t bit); #endif