linux-kernel - [PATCH] [RFC] apic: fix timer base macro definitions

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Date:   Wed,  2 Feb 2022 15:02:44 +0100
From:   Daniel Vacek <neelx@...hat.com>
To:     "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [RFC] apic: fix timer base macro definitions

I was wondering if the aliasing of APIC_TIMER_BASE_TMBASE and
APIC_LVT_TIMER_TSCDEADLINE was intentional or we need to << 19?

Also it seems the GET_APIC_TIMER_BASE, APIC_TIMER_BASE_CLKIN and
APIC_TIMER_BASE_TMBASE are not even being used. Perhaps, can we
just remove them?

Signed-off-by: Daniel Vacek <neelx@...hat.com>
---
 arch/x86/include/asm/apicdef.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index 5716f22f81ac..00b4ca49f3ea 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -95,9 +95,9 @@
 #define	APIC_LVTTHMR	0x330
 #define	APIC_LVTPC	0x340
 #define	APIC_LVT0	0x350
-#define		APIC_LVT_TIMER_BASE_MASK	(0x3 << 18)
-#define		GET_APIC_TIMER_BASE(x)		(((x) >> 18) & 0x3)
-#define		SET_APIC_TIMER_BASE(x)		(((x) << 18))
+#define		APIC_LVT_TIMER_BASE_MASK	(0x3 << 19)
+#define		GET_APIC_TIMER_BASE(x)		(((x) >> 19) & 0x3)
+#define		SET_APIC_TIMER_BASE(x)		(((x) << 19))
 #define		APIC_TIMER_BASE_CLKIN		0x0
 #define		APIC_TIMER_BASE_TMBASE		0x1
 #define		APIC_TIMER_BASE_DIV		0x2
-- 
2.34.1