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Message-Id: <20171222084627.267669895@linuxfoundation.org>
Date: Fri, 22 Dec 2017 09:45:50 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Juergen Gross <jgross@...e.com>,
Thomas Gleixner <tglx@...utronix.de>,
Xavier Deguillard <xdeguillard@...are.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Peter Zijlstra <peterz@...radead.org>, akataria@...are.com,
arnd@...db.de, boris.ostrovsky@...cle.com,
devel@...uxdriverproject.org, dmitry.torokhov@...il.com,
haiyangz@...rosoft.com, kvm@...r.kernel.org, kys@...rosoft.com,
linux-graphics-maintainer@...are.com, linux-input@...r.kernel.org,
moltmann@...are.com, pbonzini@...hat.com, pv-drivers@...are.com,
rkrcmar@...hat.com, sthemmin@...rosoft.com,
virtualization@...ts.linux-foundation.org,
xen-devel@...ts.xenproject.org, Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 4.14 065/159] x86/virt: Add enum for hypervisors to replace x86_hyper
4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Juergen Gross <jgross@...e.com>
commit 03b2a320b19f1424e9ac9c21696be9c60b6d0d93 upstream.
The x86_hyper pointer is only used for checking whether a virtual
device is supporting the hypervisor the system is running on.
Use an enum for that purpose instead and drop the x86_hyper pointer.
Signed-off-by: Juergen Gross <jgross@...e.com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Xavier Deguillard <xdeguillard@...are.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: akataria@...are.com
Cc: arnd@...db.de
Cc: boris.ostrovsky@...cle.com
Cc: devel@...uxdriverproject.org
Cc: dmitry.torokhov@...il.com
Cc: gregkh@...uxfoundation.org
Cc: haiyangz@...rosoft.com
Cc: kvm@...r.kernel.org
Cc: kys@...rosoft.com
Cc: linux-graphics-maintainer@...are.com
Cc: linux-input@...r.kernel.org
Cc: moltmann@...are.com
Cc: pbonzini@...hat.com
Cc: pv-drivers@...are.com
Cc: rkrcmar@...hat.com
Cc: sthemmin@...rosoft.com
Cc: virtualization@...ts.linux-foundation.org
Cc: xen-devel@...ts.xenproject.org
Link: http://lkml.kernel.org/r/20171109132739.23465-3-jgross@suse.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
arch/x86/hyperv/hv_init.c | 2 +-
arch/x86/include/asm/hypervisor.h | 23 ++++++++++++++---------
arch/x86/kernel/cpu/hypervisor.c | 12 +++++++++---
arch/x86/kernel/cpu/mshyperv.c | 4 ++--
arch/x86/kernel/cpu/vmware.c | 4 ++--
arch/x86/kernel/kvm.c | 4 ++--
arch/x86/xen/enlighten_hvm.c | 4 ++--
arch/x86/xen/enlighten_pv.c | 4 ++--
drivers/hv/vmbus_drv.c | 2 +-
drivers/input/mouse/vmmouse.c | 10 ++++------
drivers/misc/vmw_balloon.c | 2 +-
11 files changed, 40 insertions(+), 31 deletions(-)
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -113,7 +113,7 @@ void hyperv_init(void)
u64 guest_id;
union hv_x64_msr_hypercall_contents hypercall_msr;
- if (x86_hyper != &x86_hyper_ms_hyperv)
+ if (x86_hyper_type != X86_HYPER_MS_HYPERV)
return;
/* Allocate percpu VP index */
--- a/arch/x86/include/asm/hypervisor.h
+++ b/arch/x86/include/asm/hypervisor.h
@@ -29,6 +29,16 @@
/*
* x86 hypervisor information
*/
+
+enum x86_hypervisor_type {
+ X86_HYPER_NATIVE = 0,
+ X86_HYPER_VMWARE,
+ X86_HYPER_MS_HYPERV,
+ X86_HYPER_XEN_PV,
+ X86_HYPER_XEN_HVM,
+ X86_HYPER_KVM,
+};
+
struct hypervisor_x86 {
/* Hypervisor name */
const char *name;
@@ -36,6 +46,9 @@ struct hypervisor_x86 {
/* Detection routine */
uint32_t (*detect)(void);
+ /* Hypervisor type */
+ enum x86_hypervisor_type type;
+
/* init time callbacks */
struct x86_hyper_init init;
@@ -43,15 +56,7 @@ struct hypervisor_x86 {
struct x86_hyper_runtime runtime;
};
-extern const struct hypervisor_x86 *x86_hyper;
-
-/* Recognized hypervisors */
-extern const struct hypervisor_x86 x86_hyper_vmware;
-extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
-extern const struct hypervisor_x86 x86_hyper_xen_pv;
-extern const struct hypervisor_x86 x86_hyper_xen_hvm;
-extern const struct hypervisor_x86 x86_hyper_kvm;
-
+extern enum x86_hypervisor_type x86_hyper_type;
extern void init_hypervisor_platform(void);
#else
static inline void init_hypervisor_platform(void) { }
--- a/arch/x86/kernel/cpu/hypervisor.c
+++ b/arch/x86/kernel/cpu/hypervisor.c
@@ -26,6 +26,12 @@
#include <asm/processor.h>
#include <asm/hypervisor.h>
+extern const struct hypervisor_x86 x86_hyper_vmware;
+extern const struct hypervisor_x86 x86_hyper_ms_hyperv;
+extern const struct hypervisor_x86 x86_hyper_xen_pv;
+extern const struct hypervisor_x86 x86_hyper_xen_hvm;
+extern const struct hypervisor_x86 x86_hyper_kvm;
+
static const __initconst struct hypervisor_x86 * const hypervisors[] =
{
#ifdef CONFIG_XEN_PV
@@ -41,8 +47,8 @@ static const __initconst struct hypervis
#endif
};
-const struct hypervisor_x86 *x86_hyper;
-EXPORT_SYMBOL(x86_hyper);
+enum x86_hypervisor_type x86_hyper_type;
+EXPORT_SYMBOL(x86_hyper_type);
static inline const struct hypervisor_x86 * __init
detect_hypervisor_vendor(void)
@@ -87,6 +93,6 @@ void __init init_hypervisor_platform(voi
copy_array(&h->init, &x86_init.hyper, sizeof(h->init));
copy_array(&h->runtime, &x86_platform.hyper, sizeof(h->runtime));
- x86_hyper = h;
+ x86_hyper_type = h->type;
x86_init.hyper.init_platform();
}
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -254,9 +254,9 @@ static void __init ms_hyperv_init_platfo
#endif
}
-const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
+const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
.name = "Microsoft Hyper-V",
.detect = ms_hyperv_platform,
+ .type = X86_HYPER_MS_HYPERV,
.init.init_platform = ms_hyperv_init_platform,
};
-EXPORT_SYMBOL(x86_hyper_ms_hyperv);
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -205,10 +205,10 @@ static bool __init vmware_legacy_x2apic_
(eax & (1 << VMWARE_PORT_CMD_LEGACY_X2APIC)) != 0;
}
-const __refconst struct hypervisor_x86 x86_hyper_vmware = {
+const __initconst struct hypervisor_x86 x86_hyper_vmware = {
.name = "VMware",
.detect = vmware_platform,
+ .type = X86_HYPER_VMWARE,
.init.init_platform = vmware_platform_setup,
.init.x2apic_available = vmware_legacy_x2apic_available,
};
-EXPORT_SYMBOL(x86_hyper_vmware);
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -544,12 +544,12 @@ static uint32_t __init kvm_detect(void)
return kvm_cpuid_base();
}
-const struct hypervisor_x86 x86_hyper_kvm __refconst = {
+const __initconst struct hypervisor_x86 x86_hyper_kvm = {
.name = "KVM",
.detect = kvm_detect,
+ .type = X86_HYPER_KVM,
.init.x2apic_available = kvm_para_available,
};
-EXPORT_SYMBOL_GPL(x86_hyper_kvm);
static __init int activate_jump_labels(void)
{
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -226,12 +226,12 @@ static uint32_t __init xen_platform_hvm(
return xen_cpuid_base();
}
-const struct hypervisor_x86 x86_hyper_xen_hvm = {
+const __initconst struct hypervisor_x86 x86_hyper_xen_hvm = {
.name = "Xen HVM",
.detect = xen_platform_hvm,
+ .type = X86_HYPER_XEN_HVM,
.init.init_platform = xen_hvm_guest_init,
.init.x2apic_available = xen_x2apic_para_available,
.init.init_mem_mapping = xen_hvm_init_mem_mapping,
.runtime.pin_vcpu = xen_pin_vcpu,
};
-EXPORT_SYMBOL(x86_hyper_xen_hvm);
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1459,9 +1459,9 @@ static uint32_t __init xen_platform_pv(v
return 0;
}
-const struct hypervisor_x86 x86_hyper_xen_pv = {
+const __initconst struct hypervisor_x86 x86_hyper_xen_pv = {
.name = "Xen PV",
.detect = xen_platform_pv,
+ .type = X86_HYPER_XEN_PV,
.runtime.pin_vcpu = xen_pin_vcpu,
};
-EXPORT_SYMBOL(x86_hyper_xen_pv);
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1534,7 +1534,7 @@ static int __init hv_acpi_init(void)
{
int ret, t;
- if (x86_hyper != &x86_hyper_ms_hyperv)
+ if (x86_hyper_type != X86_HYPER_MS_HYPERV)
return -ENODEV;
init_completion(&probe_event);
--- a/drivers/input/mouse/vmmouse.c
+++ b/drivers/input/mouse/vmmouse.c
@@ -316,11 +316,9 @@ static int vmmouse_enable(struct psmouse
/*
* Array of supported hypervisors.
*/
-static const struct hypervisor_x86 *vmmouse_supported_hypervisors[] = {
- &x86_hyper_vmware,
-#ifdef CONFIG_KVM_GUEST
- &x86_hyper_kvm,
-#endif
+static enum x86_hypervisor_type vmmouse_supported_hypervisors[] = {
+ X86_HYPER_VMWARE,
+ X86_HYPER_KVM,
};
/**
@@ -331,7 +329,7 @@ static bool vmmouse_check_hypervisor(voi
int i;
for (i = 0; i < ARRAY_SIZE(vmmouse_supported_hypervisors); i++)
- if (vmmouse_supported_hypervisors[i] == x86_hyper)
+ if (vmmouse_supported_hypervisors[i] == x86_hyper_type)
return true;
return false;
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -1271,7 +1271,7 @@ static int __init vmballoon_init(void)
* Check if we are running on VMware's hypervisor and bail out
* if we are not.
*/
- if (x86_hyper != &x86_hyper_vmware)
+ if (x86_hyper_type != X86_HYPER_VMWARE)
return -ENODEV;
for (is_2m_pages = 0; is_2m_pages < VMW_BALLOON_NUM_PAGE_SIZES;
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