Add a special Kconfig symbol X86_HV_CALLBACK_VECTOR so that the guests
using the hypervisor interrupt callback counter can select and thus
enable that counter. Select it when xen or hyperv support is enabled.
No functional changes.
Signed-off-by: Zhao Yakui <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
---
v3->v4: Follow the comments to refine the commit log.
---
arch/x86/Kconfig | 3 +++
arch/x86/include/asm/hardirq.h | 2 +-
arch/x86/kernel/irq.c | 2 +-
arch/x86/xen/Kconfig | 1 +
drivers/hv/Kconfig | 1 +
5 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2bbbd4d..c9ab090 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -781,6 +781,9 @@ config PARAVIRT_SPINLOCKS
If you are unsure how to answer this question, answer Y.
+config X86_HV_CALLBACK_VECTOR
+ def_bool n
+
source "arch/x86/xen/Kconfig"
config KVM_GUEST
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index d9069bb..0753379 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -37,7 +37,7 @@ typedef struct {
#ifdef CONFIG_X86_MCE_AMD
unsigned int irq_deferred_error_count;
#endif
-#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
unsigned int irq_hv_callback_count;
#endif
#if IS_ENABLED(CONFIG_HYPERV)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 9b68b5b..4e8f193 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -135,7 +135,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
seq_puts(p, " Machine check polls\n");
#endif
-#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
if (test_bit(HYPERVISOR_CALLBACK_VECTOR, system_vectors)) {
seq_printf(p, "%*s: ", prec, "HYP");
for_each_online_cpu(j)
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index e07abef..ba5a418 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -7,6 +7,7 @@ config XEN
bool "Xen guest support"
depends on PARAVIRT
select PARAVIRT_CLOCK
+ select X86_HV_CALLBACK_VECTOR
depends on X86_64 || (X86_32 && X86_PAE)
depends on X86_LOCAL_APIC && X86_TSC
help
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 1c1a251..cafcb97 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -6,6 +6,7 @@ config HYPERV
tristate "Microsoft Hyper-V client drivers"
depends on X86 && ACPI && X86_LOCAL_APIC && HYPERVISOR_GUEST
select PARAVIRT
+ select X86_HV_CALLBACK_VECTOR
help
Select this option to run Linux as a Hyper-V client operating
system.
--
2.7.4
Commit-ID: ecca25029473bee6e98ce062e76b7310904bbdd1
Gitweb: https://git.kernel.org/tip/ecca25029473bee6e98ce062e76b7310904bbdd1
Author: Zhao Yakui <[email protected]>
AuthorDate: Tue, 30 Apr 2019 11:45:23 +0800
Committer: Borislav Petkov <[email protected]>
CommitDate: Tue, 11 Jun 2019 21:21:11 +0200
x86/Kconfig: Add new X86_HV_CALLBACK_VECTOR config symbol
Add a special Kconfig symbol X86_HV_CALLBACK_VECTOR so that the guests
using the hypervisor interrupt callback counter can select and thus
enable that counter. Select it when xen or hyperv support is enabled. No
functional changes.
Signed-off-by: Zhao Yakui <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Haiyang Zhang <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: "K. Y. Srinivasan" <[email protected]>
Cc: [email protected]
Cc: Nicolai Stange <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
---
arch/x86/Kconfig | 3 +++
arch/x86/include/asm/hardirq.h | 2 +-
arch/x86/kernel/irq.c | 2 +-
arch/x86/xen/Kconfig | 1 +
drivers/hv/Kconfig | 1 +
5 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2bbbd4d1ba31..c9ab09004b16 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -781,6 +781,9 @@ config PARAVIRT_SPINLOCKS
If you are unsure how to answer this question, answer Y.
+config X86_HV_CALLBACK_VECTOR
+ def_bool n
+
source "arch/x86/xen/Kconfig"
config KVM_GUEST
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index d9069bb26c7f..07533795b8d2 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -37,7 +37,7 @@ typedef struct {
#ifdef CONFIG_X86_MCE_AMD
unsigned int irq_deferred_error_count;
#endif
-#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
unsigned int irq_hv_callback_count;
#endif
#if IS_ENABLED(CONFIG_HYPERV)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 9b68b5b00ac9..4e8f193ad81f 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -135,7 +135,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
seq_puts(p, " Machine check polls\n");
#endif
-#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
if (test_bit(HYPERVISOR_CALLBACK_VECTOR, system_vectors)) {
seq_printf(p, "%*s: ", prec, "HYP");
for_each_online_cpu(j)
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index e07abefd3d26..ba5a41828e9d 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -7,6 +7,7 @@ config XEN
bool "Xen guest support"
depends on PARAVIRT
select PARAVIRT_CLOCK
+ select X86_HV_CALLBACK_VECTOR
depends on X86_64 || (X86_32 && X86_PAE)
depends on X86_LOCAL_APIC && X86_TSC
help
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 1c1a2514d6f3..cafcb974dcfe 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -6,6 +6,7 @@ config HYPERV
tristate "Microsoft Hyper-V client drivers"
depends on X86 && ACPI && X86_LOCAL_APIC && HYPERVISOR_GUEST
select PARAVIRT
+ select X86_HV_CALLBACK_VECTOR
help
Select this option to run Linux as a Hyper-V client operating
system.