From: Tianyu Lan <ti...@microsoft.com>
Expose x2apic_savic_update_vector() and device driver
arch code may update AVIC backing page to allow Hyper-V
inject associated vector.
Signed-off-by: Tianyu Lan <ti...@microsoft.com>
---
arch/x86/include/asm/apic.h | 9 +++++++++
arch/x86/kernel/apic/x2apic_savic.c | 8 ++++++++
2 files changed, 17 insertions(+)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 6aa4b8ff08a9..949389e05dd7 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -241,6 +241,15 @@ static inline u64 native_x2apic_icr_read(void)
return val;
}
+#if defined(CONFIG_AMD_SECURE_AVIC)
+extern void x2apic_savic_update_vector(unsigned int cpu,
+ unsigned int vector,
+ bool set);
+#else
+static inline void x2apic_savic_update_vector(unsigned int cpu,
+ unsigned int vector,
bool set) { }
+#endif
+
extern int x2apic_mode;
extern int x2apic_phys;
extern void __init x2apic_set_max_apicid(u32 apicid);
diff --git a/arch/x86/kernel/apic/x2apic_savic.c
b/arch/x86/kernel/apic/x2apic_savic.c
index 6284d1f8dac9..0dd7e39931b0 100644
--- a/arch/x86/kernel/apic/x2apic_savic.c
+++ b/arch/x86/kernel/apic/x2apic_savic.c
@@ -321,6 +321,14 @@ static void savic_update_vector(unsigned int cpu, unsigned
int vector, bool set)
update_vector(cpu, SAVIC_ALLOWED_IRR, vector, set);
}
+void x2apic_savic_update_vector(unsigned int cpu, unsigned int vector, bool
set)
+{
+ if (!cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
+ return;
+
+ savic_update_vector(cpu, vector, set);
+}
+
static void init_apic_page(void)
{
u32 apic_id;
--
2.25.1
