[patch V4 19/41] x86/apic: Use u32 for [gs]et_apic_id()

Thomas Gleixner
2023-08-14T08:55:37Z

APIC IDs are used with random data types u16, u32, int, unsigned int,
unsigned long.

Make it all consistently use u32 because that reflects the hardware
register width.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Michael Kelley <mikelley@microsoft.com>

---
arch/x86/include/asm/apic.h | 14 ++------------
arch/x86/kernel/apic/apic_flat_64.c | 4 ++--
arch/x86/kernel/apic/apic_noop.c | 2 +-
arch/x86/kernel/apic/apic_numachip.c | 8 ++++----
arch/x86/kernel/apic/bigsmp_32.c | 2 +-
arch/x86/kernel/apic/local.h | 4 ++--
arch/x86/kernel/apic/probe_32.c | 10 ++++++++++
arch/x86/kernel/apic/x2apic_phys.c | 4 ++--
arch/x86/kernel/apic/x2apic_uv_x.c | 2 +-
arch/x86/xen/apic.c | 4 ++--
10 files changed, 27 insertions(+), 27 deletions(-)

--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -298,8 +298,8 @@ struct apic {
u32 (*cpu_present_to_apicid)(int mps_cpu);
u32 (*phys_pkg_id)(u32 cpuid_apic, int index_msb);

- u32 (*get_apic_id)(unsigned long x);
- u32 (*set_apic_id)(unsigned int id);
+ u32 (*get_apic_id)(u32 id);
+ u32 (*set_apic_id)(u32 apicid);

/* wakeup_secondary_cpu */
int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
@@ -493,16 +493,6 @@ static inline bool lapic_vector_set_in_i
return !!(irr & (1U << (vector % 32)));
}

-static inline unsigned default_get_apic_id(unsigned long x)
-{
- unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
-
- if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
- return (x >> 24) & 0xFF;
- else
- return (x >> 24) & 0x0F;
-}
-
/*
* Warm reset vector position:
*/
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -56,12 +56,12 @@ flat_send_IPI_mask_allbutself(const stru
_flat_send_IPI_mask(mask, vector);
}

-static unsigned int flat_get_apic_id(unsigned long x)
+static u32 flat_get_apic_id(u32 x)
{
return (x >> 24) & 0xFF;
}

-static u32 set_apic_id(unsigned int id)
+static u32 set_apic_id(u32 id)
{
return (id & 0xFF) << 24;
}
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -30,7 +30,7 @@ static void noop_apic_icr_write(u32 low,
static int noop_wakeup_secondary_cpu(int apicid, unsigned long start_eip) { return -1; }
static u64 noop_apic_icr_read(void) { return 0; }
static u32 noop_phys_pkg_id(u32 cpuid_apic, int index_msb) { return 0; }
-static unsigned int noop_get_apic_id(unsigned long x) { return 0; }
+static u32 noop_get_apic_id(u32 apicid) { return 0; }
static void noop_apic_eoi(void) { }

static u32 noop_apic_read(u32 reg)
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -25,7 +25,7 @@ static const struct apic apic_numachip1;
static const struct apic apic_numachip2;
static void (*numachip_apic_icr_write)(int apicid, unsigned int val) __read_mostly;

-static unsigned int numachip1_get_apic_id(unsigned long x)
+static u32 numachip1_get_apic_id(u32 x)
{
unsigned long value;
unsigned int id = (x >> 24) & 0xff;
@@ -38,12 +38,12 @@ static unsigned int numachip1_get_apic_i
return id;
}

-static u32 numachip1_set_apic_id(unsigned int id)
+static u32 numachip1_set_apic_id(u32 id)
{
return (id & 0xff) << 24;
}

-static unsigned int numachip2_get_apic_id(unsigned long x)
+static u32 numachip2_get_apic_id(u32 x)
{
u64 mcfg;

@@ -51,7 +51,7 @@ static unsigned int numachip2_get_apic_i
return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
}

-static u32 numachip2_set_apic_id(unsigned int id)
+static u32 numachip2_set_apic_id(u32 id)
{
return id << 24;
}
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -13,7 +13,7 @@

#include "local.h"

-static unsigned bigsmp_get_apic_id(unsigned long x)
+static u32 bigsmp_get_apic_id(u32 x)
{
return (x >> 24) & 0xFF;
}
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -15,8 +15,8 @@

/* X2APIC */
void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest);
-unsigned int x2apic_get_apic_id(unsigned long id);
-u32 x2apic_set_apic_id(unsigned int id);
+u32 x2apic_get_apic_id(u32 id);
+u32 x2apic_set_apic_id(u32 id);
u32 x2apic_phys_pkg_id(u32 initial_apicid, int index_msb);

void x2apic_send_IPI_all(int vector);
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -23,6 +23,16 @@ static u32 default_phys_pkg_id(u32 cpuid
return cpuid_apic >> index_msb;
}

+static u32 default_get_apic_id(u32 x)
+{
+ unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
+
+ if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
+ return (x >> 24) & 0xFF;
+ else
+ return (x >> 24) & 0x0F;
+}
+
/* should be called last. */
static int probe_default(void)
{
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -124,12 +124,12 @@ static int x2apic_phys_probe(void)
return apic == &apic_x2apic_phys;
}

-unsigned int x2apic_get_apic_id(unsigned long id)
+u32 x2apic_get_apic_id(u32 id)
{
return id;
}

-u32 x2apic_set_apic_id(unsigned int id)
+u32 x2apic_set_apic_id(u32 id)
{
return id;
}
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -780,7 +780,7 @@ static void uv_send_IPI_all(int vector)
uv_send_IPI_mask(cpu_online_mask, vector);
}

-static u32 set_apic_id(unsigned int id)
+static u32 set_apic_id(u32 id)
{
return id;
}
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -33,13 +33,13 @@ static unsigned int xen_io_apic_read(uns
return 0xfd;
}

-static u32 xen_set_apic_id(unsigned int x)
+static u32 xen_set_apic_id(u32 x)
{
WARN_ON(1);
return x;
}

-static unsigned int xen_get_apic_id(unsigned long x)
+static u32 xen_get_apic_id(u32 x)
{
return ((x)>>24) & 0xFFu;
}