diff mbox series

[v2,2/4] arm64/process: Make loading of 32bit processes depend on aarch32_enabled()

Message ID 2d105c9d8184686fe5aadf646bea7f46ec68ff8b.1698069331.git.andrea.porta@suse.com
State New
Headers
Series arm64: Make Aarch32 compatibility enablement optional at boot |

Commit Message

Andrea della Porta Oct. 23, 2023, 2:42 p.m. UTC 
  Major aspect of Aarch32 support is the ability to load 32bit
processes.
That's currently decided (among others) by compat_elf_check_arch()
and system_supports_32bit_el0().

Make the macro use aarch32_enabled() to decide if Aarch32 compat is
enabled before loading a 32bit process.

Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
---
 arch/arm64/include/asm/cpufeature.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 1180d68daaff..778f2f3b2c7d 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -679,8 +679,9 @@  static inline bool system_supports_32bit_el0(void)
 {
 	u64 pfr0 = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
 
-	return static_branch_unlikely(&arm64_mismatched_32bit_el0) ||
-	       id_aa64pfr0_32bit_el0(pfr0);
+	return (static_branch_unlikely(&arm64_mismatched_32bit_el0) ||
+		id_aa64pfr0_32bit_el0(pfr0)) &&
+		aarch32_enabled();
 }
 
 static inline bool system_supports_4kb_granule(void)