[tip: x86/apic] x86/apic: Allow apic::wait_icr_idle() to be NULL
From: tip-bot2 for Thomas Gleixner
Date: Wed Aug 09 2023 - 16:37:24 EST
The following commit has been merged into the x86/apic branch of tip:
Commit-ID: ee513d9da315592c27daa3cf5ce9ec2747b2bacd
Gitweb: https://git.kernel.org/tip/ee513d9da315592c27daa3cf5ce9ec2747b2bacd
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 08 Aug 2023 15:04:04 -07:00
Committer: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 09 Aug 2023 11:58:28 -07:00
x86/apic: Allow apic::wait_icr_idle() to be NULL
Nuke more NOOP callbacks and make the invocation conditional. Will be
replaced with a static call later.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Tested-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Tested-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx> # Xen PV (dom0 and unpriv. guest)
---
arch/x86/include/asm/apic.h | 9 ++-------
arch/x86/kernel/apic/apic_noop.c | 2 --
arch/x86/kernel/apic/apic_numachip.c | 7 -------
arch/x86/kernel/apic/x2apic_cluster.c | 1 -
arch/x86/kernel/apic/x2apic_phys.c | 1 -
arch/x86/kernel/apic/x2apic_uv_x.c | 1 -
arch/x86/xen/apic.c | 5 -----
7 files changed, 2 insertions(+), 24 deletions(-)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 1499865..397cd5f 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -206,12 +206,6 @@ static inline u32 native_apic_msr_read(u32 reg)
return (u32)msr;
}
-static inline void native_x2apic_wait_icr_idle(void)
-{
- /* no need to wait for icr idle in x2apic */
- return;
-}
-
static inline u32 native_safe_x2apic_wait_icr_idle(void)
{
/* no need to wait for icr idle in x2apic */
@@ -376,7 +370,8 @@ static inline void apic_icr_write(u32 low, u32 high)
static inline void apic_wait_icr_idle(void)
{
- apic->wait_icr_idle();
+ if (apic->wait_icr_idle)
+ apic->wait_icr_idle();
}
static inline u32 safe_apic_wait_icr_idle(void)
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index c73a7a8..ef31a2e 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -20,7 +20,6 @@ static void noop_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vec
static void noop_send_IPI_allbutself(int vector) { }
static void noop_send_IPI_all(int vector) { }
static void noop_send_IPI_self(int vector) { }
-static void noop_apic_wait_icr_idle(void) { }
static void noop_apic_icr_write(u32 low, u32 id) { }
static int noop_wakeup_secondary_cpu(int apicid, unsigned long start_eip)
@@ -105,6 +104,5 @@ struct apic apic_noop __ro_after_init = {
.eoi_write = noop_apic_write,
.icr_read = noop_apic_icr_read,
.icr_write = noop_apic_icr_write,
- .wait_icr_idle = noop_apic_wait_icr_idle,
.safe_wait_icr_idle = noop_safe_apic_wait_icr_idle,
};
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index e8e13d7..647ed77 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -223,11 +223,6 @@ static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
return 1;
}
-/* APIC IPIs are queued */
-static void numachip_apic_wait_icr_idle(void)
-{
-}
-
/* APIC NMI IPIs are queued */
static u32 numachip_safe_apic_wait_icr_idle(void)
{
@@ -269,7 +264,6 @@ static const struct apic apic_numachip1 __refconst = {
.eoi_write = native_apic_mem_write,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
- .wait_icr_idle = numachip_apic_wait_icr_idle,
.safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle,
};
@@ -310,7 +304,6 @@ static const struct apic apic_numachip2 __refconst = {
.eoi_write = native_apic_mem_write,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
- .wait_icr_idle = numachip_apic_wait_icr_idle,
.safe_wait_icr_idle = numachip_safe_apic_wait_icr_idle,
};
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 705b33d..7ceef70 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -266,7 +266,6 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
.eoi_write = native_apic_msr_eoi_write,
.icr_read = native_x2apic_icr_read,
.icr_write = native_x2apic_icr_write,
- .wait_icr_idle = native_x2apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
};
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index e0fdbf5..c1ab678 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -180,7 +180,6 @@ static struct apic apic_x2apic_phys __ro_after_init = {
.eoi_write = native_apic_msr_eoi_write,
.icr_read = native_x2apic_icr_read,
.icr_write = native_x2apic_icr_write,
- .wait_icr_idle = native_x2apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
};
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 9e25e30..5cb68f6 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -854,7 +854,6 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
.eoi_write = native_apic_msr_eoi_write,
.icr_read = native_x2apic_icr_read,
.icr_write = native_x2apic_icr_write,
- .wait_icr_idle = native_x2apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle,
};
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
index f1cd7f2..e709bf0 100644
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -120,10 +120,6 @@ static int xen_phys_pkg_id(int initial_apic_id, int index_msb)
return initial_apic_id >> index_msb;
}
-static void xen_noop(void)
-{
-}
-
static int xen_cpu_present_to_apicid(int cpu)
{
if (cpu_present(cpu))
@@ -165,7 +161,6 @@ static struct apic xen_pv_apic = {
.icr_read = xen_apic_icr_read,
.icr_write = xen_apic_icr_write,
- .wait_icr_idle = xen_noop,
.safe_wait_icr_idle = xen_safe_apic_wait_icr_idle,
};