linux-kernel - [RFC][PATCH 05/34] x86/cpu: Move /proc per-cpu ->x86_phys

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Date: Thu, 22 Feb 2024 10:39:33 -0800
From: Dave Hansen <dave.hansen@...ux.intel.com>
To: linux-kernel@...r.kernel.org
Cc: kirill.shutemov@...ux.intel.com,pbonzini@...hat.com,tglx@...utronix.de,x86@...nel.org,bp@...en8.de,Dave Hansen <dave.hansen@...ux.intel.com>
Subject: [RFC][PATCH 05/34] x86/cpu: Move /proc per-cpu ->x86_phys_bits reference to global one


From: Dave Hansen <dave.hansen@...ux.intel.com>

This is one of the few references to the per-cpu version of
->x86_phys_bits.  It is theoretically possible to have this value vary
from CPU to CPU.  But in practice nobody builds systems that way.

Continue outputting the value in /proc, but read it from the global
configuration.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
---

 b/arch/x86/kernel/cpu/proc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/x86/kernel/cpu/proc.c~proc-global-x86-phys-bits arch/x86/kernel/cpu/proc.c
--- a/arch/x86/kernel/cpu/proc.c~proc-global-x86-phys-bits	2024-02-22 10:08:50.584536732 -0800
+++ b/arch/x86/kernel/cpu/proc.c	2024-02-22 10:08:50.584536732 -0800
@@ -133,7 +133,7 @@ static int show_cpuinfo(struct seq_file
 	seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
 	seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
 	seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
-		   c->x86_phys_bits, c->x86_virt_bits);
+		   x86_phys_bits(), c->x86_virt_bits);
 
 	seq_puts(m, "power management:");
 	for (i = 0; i < 32; i++) {
_