arm64: cpufeatures: Fix FEAT_NV check when checking for FEAT_NV1

Using this_cpu_has_cap() has the potential to go wrong when
used system-wide on a preemptible kernel. Instead, use the
__system_matches_cap() helper when checking for FEAT_NV in the
FEAT_NV1 probing helper.

Fixes: 3673d01 ("arm64: cpufeatures: Only check for NV1 if NV is present")
Reported-by: Marek Szyprowski <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Reviewed-by: Suzuki K Poulose <[email protected]>
Tested-by: Marek Szyprowski <[email protected]>
Link: https://lore.kernel.org/kvmarm/[email protected]/
Signed-off-by: Oliver Upton <[email protected]>

Author: Marc Zyngier

arch/arm64/kernel/cpufeature.c

@@ -1812,7 +1812,7 @@ static bool has_nv1(const struct arm64_cpu_capabilities *entry, int scope)
 		{}
 	};
 
-	return (this_cpu_has_cap(ARM64_HAS_NESTED_VIRT) &&
+	return (__system_matches_cap(ARM64_HAS_NESTED_VIRT) &&
 		!(has_cpuid_feature(entry, scope) ||
 		  is_midr_in_range_list(read_cpuid_id(), nv1_ni_list)));
 }