2020-09-26 14:30:51

by Joseph Salisbury

[permalink] [raw]
Subject: [PATCH] x86/hyperv: Remove aliases with X64 in their name

From: Joseph Salisbury <[email protected]>

In the architecture independent version of hyperv-tlfs.h, commit c55a844f46f958b
removed the "X64" in the symbol names so they would make sense for both x86 and
ARM64. That commit added aliases with the "X64" in the x86 version of hyperv-tlfs.h
so that existing x86 code would continue to compile.

As a cleanup, update the x86 code to use the symbols without the "X64", then remove
the aliases. There's no functional change.

Signed-off-by: Joseph Salisbury <[email protected]>
---
arch/x86/hyperv/hv_init.c | 8 ++++----
arch/x86/hyperv/hv_spinlock.c | 2 +-
arch/x86/include/asm/hyperv-tlfs.h | 33 ------------------------------
arch/x86/kernel/cpu/mshyperv.c | 8 ++++----
arch/x86/kvm/hyperv.c | 20 +++++++++---------
5 files changed, 19 insertions(+), 52 deletions(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 6035df1b49e1..e04d90af4c27 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -148,9 +148,9 @@ static inline bool hv_reenlightenment_available(void)
* Check for required features and priviliges to make TSC frequency
* change notifications work.
*/
- return ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ return ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE &&
- ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT;
+ ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT;
}

DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
@@ -330,8 +330,8 @@ void __init hyperv_init(void)
return;

/* Absolutely required MSRs */
- required_msrs = HV_X64_MSR_HYPERCALL_AVAILABLE |
- HV_X64_MSR_VP_INDEX_AVAILABLE;
+ required_msrs = HV_MSR_HYPERCALL_AVAILABLE |
+ HV_MSR_VP_INDEX_AVAILABLE;

if ((ms_hyperv.features & required_msrs) != required_msrs)
return;
diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c
index 07f21a06392f..f3270c1fc48c 100644
--- a/arch/x86/hyperv/hv_spinlock.c
+++ b/arch/x86/hyperv/hv_spinlock.c
@@ -66,7 +66,7 @@ void __init hv_init_spinlocks(void)
{
if (!hv_pvspin || !apic ||
!(ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) ||
- !(ms_hyperv.features & HV_X64_MSR_GUEST_IDLE_AVAILABLE)) {
+ !(ms_hyperv.features & HV_MSR_GUEST_IDLE_AVAILABLE)) {
pr_info("PV spinlocks disabled\n");
return;
}
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 7a4d2062385c..0ed20e8bba9e 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -27,39 +27,6 @@
#define HYPERV_CPUID_MIN 0x40000005
#define HYPERV_CPUID_MAX 0x4000ffff

-/*
- * Aliases for Group A features that have X64 in the name.
- * On x86/x64 these are HYPERV_CPUID_FEATURES.EAX bits.
- */
-
-#define HV_X64_MSR_VP_RUNTIME_AVAILABLE \
- HV_MSR_VP_RUNTIME_AVAILABLE
-#define HV_X64_MSR_SYNIC_AVAILABLE \
- HV_MSR_SYNIC_AVAILABLE
-#define HV_X64_MSR_APIC_ACCESS_AVAILABLE \
- HV_MSR_APIC_ACCESS_AVAILABLE
-#define HV_X64_MSR_HYPERCALL_AVAILABLE \
- HV_MSR_HYPERCALL_AVAILABLE
-#define HV_X64_MSR_VP_INDEX_AVAILABLE \
- HV_MSR_VP_INDEX_AVAILABLE
-#define HV_X64_MSR_RESET_AVAILABLE \
- HV_MSR_RESET_AVAILABLE
-#define HV_X64_MSR_GUEST_IDLE_AVAILABLE \
- HV_MSR_GUEST_IDLE_AVAILABLE
-#define HV_X64_ACCESS_FREQUENCY_MSRS \
- HV_ACCESS_FREQUENCY_MSRS
-#define HV_X64_ACCESS_REENLIGHTENMENT \
- HV_ACCESS_REENLIGHTENMENT
-#define HV_X64_ACCESS_TSC_INVARIANT \
- HV_ACCESS_TSC_INVARIANT
-
-/*
- * Aliases for Group B features that have X64 in the name.
- * On x86/x64 these are HYPERV_CPUID_FEATURES.EBX bits.
- */
-#define HV_X64_POST_MESSAGES HV_POST_MESSAGES
-#define HV_X64_SIGNAL_EVENTS HV_SIGNAL_EVENTS
-
/*
* Group D Features. The bit assignments are custom to each architecture.
* On x86/x64 these are HYPERV_CPUID_FEATURES.EDX bits.
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 31125448b174..9834a43cd0fa 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -248,7 +248,7 @@ static void __init ms_hyperv_init_platform(void)
hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF);
}

- if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
x86_platform.calibrate_tsc = hv_get_tsc_khz;
x86_platform.calibrate_cpu = hv_get_tsc_khz;
@@ -270,7 +270,7 @@ static void __init ms_hyperv_init_platform(void)
crash_kexec_post_notifiers = true;

#ifdef CONFIG_X86_LOCAL_APIC
- if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
/*
* Get the APIC frequency.
@@ -296,7 +296,7 @@ static void __init ms_hyperv_init_platform(void)
machine_ops.shutdown = hv_machine_shutdown;
machine_ops.crash_shutdown = hv_machine_crash_shutdown;
#endif
- if (ms_hyperv.features & HV_X64_ACCESS_TSC_INVARIANT) {
+ if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) {
wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, 0x1);
setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
} else {
@@ -330,7 +330,7 @@ static void __init ms_hyperv_init_platform(void)
alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_hyperv_callback);

/* Setup the IDT for reenlightenment notifications */
- if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) {
+ if (ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT) {
alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR,
asm_sysvec_hyperv_reenlightenment);
}
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 1d330564eed8..8c1e8334eff0 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2000,20 +2000,20 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
break;

case HYPERV_CPUID_FEATURES:
- ent->eax |= HV_X64_MSR_VP_RUNTIME_AVAILABLE;
+ ent->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
- ent->eax |= HV_X64_MSR_SYNIC_AVAILABLE;
+ ent->eax |= HV_MSR_SYNIC_AVAILABLE;
ent->eax |= HV_MSR_SYNTIMER_AVAILABLE;
- ent->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
- ent->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
- ent->eax |= HV_X64_MSR_VP_INDEX_AVAILABLE;
- ent->eax |= HV_X64_MSR_RESET_AVAILABLE;
+ ent->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
+ ent->eax |= HV_MSR_HYPERCALL_AVAILABLE;
+ ent->eax |= HV_MSR_VP_INDEX_AVAILABLE;
+ ent->eax |= HV_MSR_RESET_AVAILABLE;
ent->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
- ent->eax |= HV_X64_ACCESS_FREQUENCY_MSRS;
- ent->eax |= HV_X64_ACCESS_REENLIGHTENMENT;
+ ent->eax |= HV_ACCESS_FREQUENCY_MSRS;
+ ent->eax |= HV_ACCESS_REENLIGHTENMENT;

- ent->ebx |= HV_X64_POST_MESSAGES;
- ent->ebx |= HV_X64_SIGNAL_EVENTS;
+ ent->ebx |= HV_POST_MESSAGES;
+ ent->ebx |= HV_SIGNAL_EVENTS;

ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
--
2.17.1


2020-09-27 00:19:52

by Michael Kelley (LINUX)

[permalink] [raw]
Subject: RE: [PATCH] x86/hyperv: Remove aliases with X64 in their name

From: Joseph Salisbury <[email protected]> Sent: Saturday, September 26, 2020 7:26 AM
>
> In the architecture independent version of hyperv-tlfs.h, commit c55a844f46f958b
> removed the "X64" in the symbol names so they would make sense for both x86 and
> ARM64. That commit added aliases with the "X64" in the x86 version of hyperv-tlfs.h
> so that existing x86 code would continue to compile.
>
> As a cleanup, update the x86 code to use the symbols without the "X64", then remove
> the aliases. There's no functional change.
>
> Signed-off-by: Joseph Salisbury <[email protected]>
> ---
> arch/x86/hyperv/hv_init.c | 8 ++++----
> arch/x86/hyperv/hv_spinlock.c | 2 +-
> arch/x86/include/asm/hyperv-tlfs.h | 33 ------------------------------
> arch/x86/kernel/cpu/mshyperv.c | 8 ++++----
> arch/x86/kvm/hyperv.c | 20 +++++++++---------
> 5 files changed, 19 insertions(+), 52 deletions(-)
>

Reviewed-by: Michael Kelley <[email protected]>

2020-09-27 06:55:58

by Paolo Bonzini

[permalink] [raw]
Subject: Re: [PATCH] x86/hyperv: Remove aliases with X64 in their name

On 26/09/20 16:26, Joseph Salisbury wrote:
> From: Joseph Salisbury <[email protected]>
>
> In the architecture independent version of hyperv-tlfs.h, commit c55a844f46f958b
> removed the "X64" in the symbol names so they would make sense for both x86 and
> ARM64. That commit added aliases with the "X64" in the x86 version of hyperv-tlfs.h
> so that existing x86 code would continue to compile.
>
> As a cleanup, update the x86 code to use the symbols without the "X64", then remove
> the aliases. There's no functional change.
>
> Signed-off-by: Joseph Salisbury <[email protected]>
> ---
> arch/x86/hyperv/hv_init.c | 8 ++++----
> arch/x86/hyperv/hv_spinlock.c | 2 +-
> arch/x86/include/asm/hyperv-tlfs.h | 33 ------------------------------
> arch/x86/kernel/cpu/mshyperv.c | 8 ++++----
> arch/x86/kvm/hyperv.c | 20 +++++++++---------
> 5 files changed, 19 insertions(+), 52 deletions(-)
>
> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> index 6035df1b49e1..e04d90af4c27 100644
> --- a/arch/x86/hyperv/hv_init.c
> +++ b/arch/x86/hyperv/hv_init.c
> @@ -148,9 +148,9 @@ static inline bool hv_reenlightenment_available(void)
> * Check for required features and priviliges to make TSC frequency
> * change notifications work.
> */
> - return ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
> + return ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
> ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE &&
> - ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT;
> + ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT;
> }
>
> DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
> @@ -330,8 +330,8 @@ void __init hyperv_init(void)
> return;
>
> /* Absolutely required MSRs */
> - required_msrs = HV_X64_MSR_HYPERCALL_AVAILABLE |
> - HV_X64_MSR_VP_INDEX_AVAILABLE;
> + required_msrs = HV_MSR_HYPERCALL_AVAILABLE |
> + HV_MSR_VP_INDEX_AVAILABLE;
>
> if ((ms_hyperv.features & required_msrs) != required_msrs)
> return;
> diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c
> index 07f21a06392f..f3270c1fc48c 100644
> --- a/arch/x86/hyperv/hv_spinlock.c
> +++ b/arch/x86/hyperv/hv_spinlock.c
> @@ -66,7 +66,7 @@ void __init hv_init_spinlocks(void)
> {
> if (!hv_pvspin || !apic ||
> !(ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) ||
> - !(ms_hyperv.features & HV_X64_MSR_GUEST_IDLE_AVAILABLE)) {
> + !(ms_hyperv.features & HV_MSR_GUEST_IDLE_AVAILABLE)) {
> pr_info("PV spinlocks disabled\n");
> return;
> }
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index 7a4d2062385c..0ed20e8bba9e 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -27,39 +27,6 @@
> #define HYPERV_CPUID_MIN 0x40000005
> #define HYPERV_CPUID_MAX 0x4000ffff
>
> -/*
> - * Aliases for Group A features that have X64 in the name.
> - * On x86/x64 these are HYPERV_CPUID_FEATURES.EAX bits.
> - */
> -
> -#define HV_X64_MSR_VP_RUNTIME_AVAILABLE \
> - HV_MSR_VP_RUNTIME_AVAILABLE
> -#define HV_X64_MSR_SYNIC_AVAILABLE \
> - HV_MSR_SYNIC_AVAILABLE
> -#define HV_X64_MSR_APIC_ACCESS_AVAILABLE \
> - HV_MSR_APIC_ACCESS_AVAILABLE
> -#define HV_X64_MSR_HYPERCALL_AVAILABLE \
> - HV_MSR_HYPERCALL_AVAILABLE
> -#define HV_X64_MSR_VP_INDEX_AVAILABLE \
> - HV_MSR_VP_INDEX_AVAILABLE
> -#define HV_X64_MSR_RESET_AVAILABLE \
> - HV_MSR_RESET_AVAILABLE
> -#define HV_X64_MSR_GUEST_IDLE_AVAILABLE \
> - HV_MSR_GUEST_IDLE_AVAILABLE
> -#define HV_X64_ACCESS_FREQUENCY_MSRS \
> - HV_ACCESS_FREQUENCY_MSRS
> -#define HV_X64_ACCESS_REENLIGHTENMENT \
> - HV_ACCESS_REENLIGHTENMENT
> -#define HV_X64_ACCESS_TSC_INVARIANT \
> - HV_ACCESS_TSC_INVARIANT
> -
> -/*
> - * Aliases for Group B features that have X64 in the name.
> - * On x86/x64 these are HYPERV_CPUID_FEATURES.EBX bits.
> - */
> -#define HV_X64_POST_MESSAGES HV_POST_MESSAGES
> -#define HV_X64_SIGNAL_EVENTS HV_SIGNAL_EVENTS
> -
> /*
> * Group D Features. The bit assignments are custom to each architecture.
> * On x86/x64 these are HYPERV_CPUID_FEATURES.EDX bits.
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index 31125448b174..9834a43cd0fa 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -248,7 +248,7 @@ static void __init ms_hyperv_init_platform(void)
> hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF);
> }
>
> - if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
> + if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
> ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
> x86_platform.calibrate_tsc = hv_get_tsc_khz;
> x86_platform.calibrate_cpu = hv_get_tsc_khz;
> @@ -270,7 +270,7 @@ static void __init ms_hyperv_init_platform(void)
> crash_kexec_post_notifiers = true;
>
> #ifdef CONFIG_X86_LOCAL_APIC
> - if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
> + if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
> ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
> /*
> * Get the APIC frequency.
> @@ -296,7 +296,7 @@ static void __init ms_hyperv_init_platform(void)
> machine_ops.shutdown = hv_machine_shutdown;
> machine_ops.crash_shutdown = hv_machine_crash_shutdown;
> #endif
> - if (ms_hyperv.features & HV_X64_ACCESS_TSC_INVARIANT) {
> + if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) {
> wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, 0x1);
> setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
> } else {
> @@ -330,7 +330,7 @@ static void __init ms_hyperv_init_platform(void)
> alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_hyperv_callback);
>
> /* Setup the IDT for reenlightenment notifications */
> - if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) {
> + if (ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT) {
> alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR,
> asm_sysvec_hyperv_reenlightenment);
> }
> diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
> index 1d330564eed8..8c1e8334eff0 100644
> --- a/arch/x86/kvm/hyperv.c
> +++ b/arch/x86/kvm/hyperv.c
> @@ -2000,20 +2000,20 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
> break;
>
> case HYPERV_CPUID_FEATURES:
> - ent->eax |= HV_X64_MSR_VP_RUNTIME_AVAILABLE;
> + ent->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
> ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
> - ent->eax |= HV_X64_MSR_SYNIC_AVAILABLE;
> + ent->eax |= HV_MSR_SYNIC_AVAILABLE;
> ent->eax |= HV_MSR_SYNTIMER_AVAILABLE;
> - ent->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
> - ent->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
> - ent->eax |= HV_X64_MSR_VP_INDEX_AVAILABLE;
> - ent->eax |= HV_X64_MSR_RESET_AVAILABLE;
> + ent->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
> + ent->eax |= HV_MSR_HYPERCALL_AVAILABLE;
> + ent->eax |= HV_MSR_VP_INDEX_AVAILABLE;
> + ent->eax |= HV_MSR_RESET_AVAILABLE;
> ent->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
> - ent->eax |= HV_X64_ACCESS_FREQUENCY_MSRS;
> - ent->eax |= HV_X64_ACCESS_REENLIGHTENMENT;
> + ent->eax |= HV_ACCESS_FREQUENCY_MSRS;
> + ent->eax |= HV_ACCESS_REENLIGHTENMENT;
>
> - ent->ebx |= HV_X64_POST_MESSAGES;
> - ent->ebx |= HV_X64_SIGNAL_EVENTS;
> + ent->ebx |= HV_POST_MESSAGES;
> + ent->ebx |= HV_SIGNAL_EVENTS;
>
> ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
> ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
>

Acked-by: Paolo Bonzini <[email protected]>

Subject: [tip: x86/hyperv] x86/hyperv: Remove aliases with X64 in their name

The following commit has been merged into the x86/hyperv branch of tip:

Commit-ID: dfc53baae3c6a165a35735b789e3e083786271d6
Gitweb: https://git.kernel.org/tip/dfc53baae3c6a165a35735b789e3e083786271d6
Author: Joseph Salisbury <[email protected]>
AuthorDate: Sat, 26 Sep 2020 07:26:26 -07:00
Committer: Thomas Gleixner <[email protected]>
CommitterDate: Sun, 27 Sep 2020 11:34:54 +02:00

x86/hyperv: Remove aliases with X64 in their name

In the architecture independent version of hyperv-tlfs.h, commit c55a844f46f958b
removed the "X64" in the symbol names so they would make sense for both x86 and
ARM64. That commit added aliases with the "X64" in the x86 version of hyperv-tlfs.h
so that existing x86 code would continue to compile.

As a cleanup, update the x86 code to use the symbols without the "X64", then remove
the aliases. There's no functional change.

Signed-off-by: Joseph Salisbury <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Michael Kelley <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

---
arch/x86/hyperv/hv_init.c | 8 +++----
arch/x86/hyperv/hv_spinlock.c | 2 +-
arch/x86/include/asm/hyperv-tlfs.h | 33 +-----------------------------
arch/x86/kernel/cpu/mshyperv.c | 8 +++----
arch/x86/kvm/hyperv.c | 20 +++++++++---------
5 files changed, 19 insertions(+), 52 deletions(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 6035df1..e04d90a 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -148,9 +148,9 @@ static inline bool hv_reenlightenment_available(void)
* Check for required features and priviliges to make TSC frequency
* change notifications work.
*/
- return ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ return ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE &&
- ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT;
+ ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT;
}

DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
@@ -330,8 +330,8 @@ void __init hyperv_init(void)
return;

/* Absolutely required MSRs */
- required_msrs = HV_X64_MSR_HYPERCALL_AVAILABLE |
- HV_X64_MSR_VP_INDEX_AVAILABLE;
+ required_msrs = HV_MSR_HYPERCALL_AVAILABLE |
+ HV_MSR_VP_INDEX_AVAILABLE;

if ((ms_hyperv.features & required_msrs) != required_msrs)
return;
diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c
index 07f21a0..f3270c1 100644
--- a/arch/x86/hyperv/hv_spinlock.c
+++ b/arch/x86/hyperv/hv_spinlock.c
@@ -66,7 +66,7 @@ void __init hv_init_spinlocks(void)
{
if (!hv_pvspin || !apic ||
!(ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) ||
- !(ms_hyperv.features & HV_X64_MSR_GUEST_IDLE_AVAILABLE)) {
+ !(ms_hyperv.features & HV_MSR_GUEST_IDLE_AVAILABLE)) {
pr_info("PV spinlocks disabled\n");
return;
}
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 7a4d206..0ed20e8 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -28,39 +28,6 @@
#define HYPERV_CPUID_MAX 0x4000ffff

/*
- * Aliases for Group A features that have X64 in the name.
- * On x86/x64 these are HYPERV_CPUID_FEATURES.EAX bits.
- */
-
-#define HV_X64_MSR_VP_RUNTIME_AVAILABLE \
- HV_MSR_VP_RUNTIME_AVAILABLE
-#define HV_X64_MSR_SYNIC_AVAILABLE \
- HV_MSR_SYNIC_AVAILABLE
-#define HV_X64_MSR_APIC_ACCESS_AVAILABLE \
- HV_MSR_APIC_ACCESS_AVAILABLE
-#define HV_X64_MSR_HYPERCALL_AVAILABLE \
- HV_MSR_HYPERCALL_AVAILABLE
-#define HV_X64_MSR_VP_INDEX_AVAILABLE \
- HV_MSR_VP_INDEX_AVAILABLE
-#define HV_X64_MSR_RESET_AVAILABLE \
- HV_MSR_RESET_AVAILABLE
-#define HV_X64_MSR_GUEST_IDLE_AVAILABLE \
- HV_MSR_GUEST_IDLE_AVAILABLE
-#define HV_X64_ACCESS_FREQUENCY_MSRS \
- HV_ACCESS_FREQUENCY_MSRS
-#define HV_X64_ACCESS_REENLIGHTENMENT \
- HV_ACCESS_REENLIGHTENMENT
-#define HV_X64_ACCESS_TSC_INVARIANT \
- HV_ACCESS_TSC_INVARIANT
-
-/*
- * Aliases for Group B features that have X64 in the name.
- * On x86/x64 these are HYPERV_CPUID_FEATURES.EBX bits.
- */
-#define HV_X64_POST_MESSAGES HV_POST_MESSAGES
-#define HV_X64_SIGNAL_EVENTS HV_SIGNAL_EVENTS
-
-/*
* Group D Features. The bit assignments are custom to each architecture.
* On x86/x64 these are HYPERV_CPUID_FEATURES.EDX bits.
*/
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 3112544..9834a43 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -248,7 +248,7 @@ static void __init ms_hyperv_init_platform(void)
hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF);
}

- if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
x86_platform.calibrate_tsc = hv_get_tsc_khz;
x86_platform.calibrate_cpu = hv_get_tsc_khz;
@@ -270,7 +270,7 @@ static void __init ms_hyperv_init_platform(void)
crash_kexec_post_notifiers = true;

#ifdef CONFIG_X86_LOCAL_APIC
- if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS &&
+ if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
/*
* Get the APIC frequency.
@@ -296,7 +296,7 @@ static void __init ms_hyperv_init_platform(void)
machine_ops.shutdown = hv_machine_shutdown;
machine_ops.crash_shutdown = hv_machine_crash_shutdown;
#endif
- if (ms_hyperv.features & HV_X64_ACCESS_TSC_INVARIANT) {
+ if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) {
wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, 0x1);
setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE);
} else {
@@ -330,7 +330,7 @@ static void __init ms_hyperv_init_platform(void)
alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_hyperv_callback);

/* Setup the IDT for reenlightenment notifications */
- if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) {
+ if (ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT) {
alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR,
asm_sysvec_hyperv_reenlightenment);
}
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 1d33056..8c1e833 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2000,20 +2000,20 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
break;

case HYPERV_CPUID_FEATURES:
- ent->eax |= HV_X64_MSR_VP_RUNTIME_AVAILABLE;
+ ent->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
- ent->eax |= HV_X64_MSR_SYNIC_AVAILABLE;
+ ent->eax |= HV_MSR_SYNIC_AVAILABLE;
ent->eax |= HV_MSR_SYNTIMER_AVAILABLE;
- ent->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
- ent->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
- ent->eax |= HV_X64_MSR_VP_INDEX_AVAILABLE;
- ent->eax |= HV_X64_MSR_RESET_AVAILABLE;
+ ent->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
+ ent->eax |= HV_MSR_HYPERCALL_AVAILABLE;
+ ent->eax |= HV_MSR_VP_INDEX_AVAILABLE;
+ ent->eax |= HV_MSR_RESET_AVAILABLE;
ent->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
- ent->eax |= HV_X64_ACCESS_FREQUENCY_MSRS;
- ent->eax |= HV_X64_ACCESS_REENLIGHTENMENT;
+ ent->eax |= HV_ACCESS_FREQUENCY_MSRS;
+ ent->eax |= HV_ACCESS_REENLIGHTENMENT;

- ent->ebx |= HV_X64_POST_MESSAGES;
- ent->ebx |= HV_X64_SIGNAL_EVENTS;
+ ent->ebx |= HV_POST_MESSAGES;
+ ent->ebx |= HV_SIGNAL_EVENTS;

ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;

2020-09-28 09:04:58

by Wei Liu

[permalink] [raw]
Subject: Re: [PATCH] x86/hyperv: Remove aliases with X64 in their name

On Sat, Sep 26, 2020 at 07:26:26AM -0700, Joseph Salisbury wrote:
> From: Joseph Salisbury <[email protected]>
>
> In the architecture independent version of hyperv-tlfs.h, commit c55a844f46f958b
> removed the "X64" in the symbol names so they would make sense for both x86 and
> ARM64. That commit added aliases with the "X64" in the x86 version of hyperv-tlfs.h
> so that existing x86 code would continue to compile.
>
> As a cleanup, update the x86 code to use the symbols without the "X64", then remove
> the aliases. There's no functional change.
>
> Signed-off-by: Joseph Salisbury <[email protected]>

Applied to hyperv-next. Thanks.

Wei.