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Subject[tip:x86/platform] x86/virt, x86/platform: Add ->guest_late_init() callback to hypervisor_x86 structure
Commit-ID:  f3614646005a1b59f836ff54351c9bd2224b6005
Gitweb: https://git.kernel.org/tip/f3614646005a1b59f836ff54351c9bd2224b6005
Author: Juergen Gross <jgross@suse.com>
AuthorDate: Thu, 9 Nov 2017 14:27:38 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Fri, 10 Nov 2017 10:03:13 +0100

x86/virt, x86/platform: Add ->guest_late_init() callback to hypervisor_x86 structure

Add a new guest_late_init callback to the hypervisor_x86 structure. It
will replace the current kvm_guest_init() call which is changed to
make use of the new callback.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kvm@vger.kernel.org
Cc: rkrcmar@redhat.com
Link: http://lkml.kernel.org/r/20171109132739.23465-5-jgross@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/kvm_para.h | 2 --
arch/x86/include/asm/x86_init.h | 2 ++
arch/x86/kernel/kvm.c | 3 ++-
arch/x86/kernel/setup.c | 2 +-
arch/x86/kernel/x86_init.c | 1 +
5 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index c373e44..7b407dd 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -88,7 +88,6 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
#ifdef CONFIG_KVM_GUEST
bool kvm_para_available(void);
unsigned int kvm_arch_para_features(void);
-void __init kvm_guest_init(void);
void kvm_async_pf_task_wait(u32 token, int interrupt_kernel);
void kvm_async_pf_task_wake(u32 token);
u32 kvm_read_and_reset_pf_reason(void);
@@ -103,7 +102,6 @@ static inline void kvm_spinlock_init(void)
#endif /* CONFIG_PARAVIRT_SPINLOCKS */

#else /* CONFIG_KVM_GUEST */
-#define kvm_guest_init() do {} while (0)
#define kvm_async_pf_task_wait(T, I) do {} while(0)
#define kvm_async_pf_task_wake(T) do {} while(0)

diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 260e9a8..5dd011a 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -117,11 +117,13 @@ struct x86_init_pci {
/**
* struct x86_hyper_init - x86 hypervisor init functions
* @init_platform: platform setup
+ * @guest_late_init: guest late init
* @x2apic_available: X2APIC detection
* @init_mem_mapping: setup early mappings during init_mem_mapping()
*/
struct x86_hyper_init {
void (*init_platform)(void);
+ void (*guest_late_init)(void);
bool (*x2apic_available)(void);
void (*init_mem_mapping)(void);
};
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index a94de09..4b1f6f5 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -465,7 +465,7 @@ static void __init kvm_apf_trap_init(void)
update_intr_gate(X86_TRAP_PF, async_page_fault);
}

-void __init kvm_guest_init(void)
+static void __init kvm_guest_init(void)
{
int i;

@@ -548,6 +548,7 @@ const __initconst struct hypervisor_x86 x86_hyper_kvm = {
.name = "KVM",
.detect = kvm_detect,
.type = X86_HYPER_KVM,
+ .init.guest_late_init = kvm_guest_init,
.init.x2apic_available = kvm_para_available,
};

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0957dd7..372da52 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1294,7 +1294,7 @@ void __init setup_arch(char **cmdline_p)

io_apic_init_mappings();

- kvm_guest_init();
+ x86_init.hyper.guest_late_init();

e820__reserve_resources();
e820__register_nosave_regions(max_low_pfn);
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 5b2d10c..c8fa4cd 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -86,6 +86,7 @@ struct x86_init_ops x86_init __initdata = {

.hyper = {
.init_platform = x86_init_noop,
+ .guest_late_init = x86_init_noop,
.x2apic_available = bool_x86_init_noop,
.init_mem_mapping = x86_init_noop,
},
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