linux-kernel - [PATCH v3 10/11] x86/irq: Move __prepare

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Date: Fri, 28 Jun 2024 13:18:38 -0700
From: Jacob Pan <jacob.jun.pan@...ux.intel.com>
To: X86 Kernel <x86@...nel.org>,
	Sean Christopherson <seanjc@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dave Hansen <dave.hansen@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Ingo Molnar" <mingo@...hat.com>,
	"Borislav Petkov" <bp@...en8.de>,
	"Xin Li" <xin3.li@...el.com>,
	linux-perf-users@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Cc: Paolo Bonzini <pbonzini@...hat.com>,
	Tony Luck <tony.luck@...el.com>,
	Andy Lutomirski <luto@...nel.org>,
	acme@...nel.org,
	kan.liang@...ux.intel.com,
	Andi Kleen <andi.kleen@...el.com>,
	"Mehta, Sohil" <sohil.mehta@...el.com>,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: [PATCH v3 10/11] x86/irq: Move __prepare_ICR to x86 common header

To reuse __prepare_ICR() outside APIC local code, move it to the x86
common header. e.g. It can be used by the KVM PV IPI code.

Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
---
 arch/x86/include/asm/apic.h  | 21 +++++++++++++++++++++
 arch/x86/kernel/apic/local.h | 22 ----------------------
 2 files changed, 21 insertions(+), 22 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index bcf8d17240c8..7fb4c3dae569 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -476,6 +476,27 @@ static __always_inline bool apic_id_valid(u32 apic_id)
 	return apic_id <= apic->max_apic_id;
 }
 
+static inline bool is_nmi_vector(int vector)
+{
+	return (vector & NMI_SOURCE_VEC_MASK) == NMI_VECTOR;
+}
+
+static inline unsigned int __prepare_ICR(unsigned int shortcut, int vector,
+					 unsigned int dest)
+{
+	unsigned int icr = shortcut | dest;
+
+	if (is_nmi_vector(vector)) {
+		icr |= APIC_DM_NMI;
+		if (cpu_feature_enabled(X86_FEATURE_NMI_SOURCE))
+			icr |= vector >> 16;
+	} else {
+		icr |= APIC_DM_FIXED | vector;
+	}
+
+	return icr;
+}
+
 #else /* CONFIG_X86_LOCAL_APIC */
 
 static inline u32 apic_read(u32 reg) { return 0; }
diff --git a/arch/x86/kernel/apic/local.h b/arch/x86/kernel/apic/local.h
index 60e90b7bf058..8b1fe152cd2d 100644
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -12,7 +12,6 @@
 
 #include <asm/irq_vectors.h>
 #include <asm/apic.h>
-#include <asm/nmi.h>
 
 /* X2APIC */
 void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest);
@@ -27,27 +26,6 @@ extern u32 x2apic_max_apicid;
 
 DECLARE_STATIC_KEY_FALSE(apic_use_ipi_shorthand);
 
-static inline bool is_nmi_vector(int vector)
-{
-	return (vector & NMI_SOURCE_VEC_MASK) == NMI_VECTOR;
-}
-
-static inline unsigned int __prepare_ICR(unsigned int shortcut, int vector,
-					 unsigned int dest)
-{
-	unsigned int icr = shortcut | dest;
-
-	if (is_nmi_vector(vector)) {
-		icr |= APIC_DM_NMI;
-		if (cpu_feature_enabled(X86_FEATURE_NMI_SOURCE))
-			icr |= vector >> 16;
-	} else {
-		icr |= APIC_DM_FIXED | vector;
-	}
-
-	return icr;
-}
-
 void default_init_apic_ldr(void);
 
 void apic_mem_wait_icr_idle(void);
-- 
2.25.1