[ARM64,v4.4,V3,21/44] arm64: cpufeature: Pass capability structure to ->enable callback

Message ID fa88efee3142609dedecc00a58e31bc8583d49b9.1567077734.git.viresh.kumar@linaro.org
State New
Headers show
Series
  • V4.4 backport of arm64 Spectre patches
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Commit Message

Viresh Kumar Aug. 29, 2019, 11:34 a.m.
From: Will Deacon <will.deacon@arm.com>


commit 0a0d111d40fd1dc588cc590fab6b55d86ddc71d3 upstream.

In order to invoke the CPU capability ->matches callback from the ->enable
callback for applying local-CPU workarounds, we need a handle on the
capability structure.

This patch passes a pointer to the capability structure to the ->enable
callback.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>

Signed-off-by: Will Deacon <will.deacon@arm.com>

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

[ v4.4: Use &caps[i] instead as caps isn't incremented ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

---
 arch/arm64/kernel/cpufeature.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.21.0.rc0.269.g1a574e7a288b

Patch

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index c74df3ca000e..474b34243521 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -832,7 +832,7 @@  void enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps)
 			 * uses an IPI, giving us a PSTATE that disappears when
 			 * we return.
 			 */
-			stop_machine(caps[i].enable, NULL, cpu_online_mask);
+			stop_machine(caps[i].enable, (void *)&caps[i], cpu_online_mask);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -881,7 +881,7 @@  static void verify_local_cpu_capabilities(void)
 			cpu_die_early();
 		}
 		if (caps[i].enable)
-			caps[i].enable(NULL);
+			caps[i].enable((void *)&caps[i]);
 	}
 
 	for (i = 0, caps = arm64_hwcaps; caps[i].matches; i++) {