x86/apic: Add apic->eoi_write() callback

Add eoi_write callback so that kvm can override
eoi accesses without touching the rest of the apic.
As a side-effect, this will enable a micro-optimization
for apics using msr.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: gleb@redhat.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/0df425d746c49ac2ecc405174df87752869629d2.1337184153.git.mst@redhat.com
[ tidied it up a bit ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

11 files changed, 13 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 359b6899a36c..0e881c46e8c8 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -227,6 +227,7 @@ static struct apic apic_flat =  {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
@@ -386,6 +387,7 @@ static struct apic apic_physflat =  {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 634ae6cdd5c9..a6e4c6e06c08 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -181,6 +181,7 @@ struct apic apic_noop = {
 
         .read                           = noop_apic_read,
         .write                          = noop_apic_write,
+        .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,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index 23e75422e013..6ec6d5d297c3 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -295,6 +295,7 @@ static struct apic apic_numachip __refconst = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index 0cdec7065aff..31fbdbfbf960 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -248,6 +248,7 @@ static struct apic apic_bigsmp = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
index e42d1d3b9134..db4ab1be3c79 100644
--- a/arch/x86/kernel/apic/es7000_32.c
+++ b/arch/x86/kernel/apic/es7000_32.c
@@ -678,6 +678,7 @@ static struct apic __refdata apic_es7000_cluster = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
@@ -742,6 +743,7 @@ static struct apic __refdata apic_es7000 = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index 00d2422ca7c9..f00a68cca37a 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -530,6 +530,7 @@ static struct apic __refdata apic_numaq = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index ff2c1b9aac4d..1b291da09e60 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -142,6 +142,7 @@ static struct apic apic_default = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c
index fea000b27f07..659897c00755 100644
--- a/arch/x86/kernel/apic/summit_32.c
+++ b/arch/x86/kernel/apic/summit_32.c
@@ -546,6 +546,7 @@ static struct apic apic_summit = {
 
         .read                           = native_apic_mem_read,
         .write                          = native_apic_mem_write,
+        .eoi_write                      = native_apic_mem_write,
         .icr_read                       = native_apic_icr_read,
         .icr_write                      = native_apic_icr_write,
         .wait_icr_idle                  = native_apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 48f3103b3c93..a5baa785a251 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -260,6 +260,7 @@ static struct apic apic_x2apic_cluster = {
 
         .read                           = native_apic_msr_read,
         .write                          = native_apic_msr_write,
+        .eoi_write                      = native_apic_msr_write,
         .icr_read                       = native_x2apic_icr_read,
         .icr_write                      = native_x2apic_icr_write,
         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index 991e315f4227..834035666b8d 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -172,6 +172,7 @@ static struct apic apic_x2apic_phys = {
 
         .read                           = native_apic_msr_read,
         .write                          = native_apic_msr_write,
+        .eoi_write                      = native_apic_msr_write,
         .icr_read                       = native_x2apic_icr_read,
         .icr_write                      = native_x2apic_icr_write,
         .wait_icr_idle                  = native_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 87bfa69e216e..5b0e3d0a3d2d 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -404,6 +404,7 @@ static struct apic __refdata apic_x2apic_uv_x = {
 
         .read                           = native_apic_msr_read,
         .write                          = native_apic_msr_write,
+        .eoi_write                      = native_apic_msr_write,
         .icr_read                       = native_x2apic_icr_read,
         .icr_write                      = native_x2apic_icr_write,
         .wait_icr_idle                  = native_x2apic_wait_icr_idle,