* [PATCH v3 1/2] hyperv: Move hv_current_partition_id to arch-generic code
2025-02-07 19:03 [PATCH v3 0/2] hyperv: Move some features to common code Nuno Das Neves
@ 2025-02-07 19:03 ` Nuno Das Neves
2025-02-08 15:44 ` Michael Kelley
2025-02-07 19:03 ` [PATCH v3 2/2] hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv Nuno Das Neves
2025-02-12 4:10 ` [PATCH v3 0/2] hyperv: Move some features to common code Wei Liu
2 siblings, 1 reply; 6+ messages in thread
From: Nuno Das Neves @ 2025-02-07 19:03 UTC (permalink / raw)
To: linux-hyperv, linux-arm-kernel, linux-kernel, linux-arch, wei.liu,
mhklinux
Cc: kys, haiyangz, decui, catalin.marinas, will, tglx, mingo, bp,
dave.hansen, x86, hpa, arnd, jinankjain, muminulrussell,
skinsburskii, mukeshrathor
Move hv_current_partition_id and hv_get_partition_id() to hv_common.c,
and call hv_get_partition_id() on arm64 in hyperv_init(). These aren't
specific to x86_64 and will be needed by common code.
Set hv_current_partition_id to HV_PARTITION_ID_SELF by default.
Rename struct hv_get_partition_id to hv_output_get_partition_id, to
make it distinct from the function hv_get_partition_id(), and match
the original Hyper-V struct name.
Remove the BUG()s. Failing to get the id need not crash the machine.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
---
arch/arm64/hyperv/mshyperv.c | 3 +++
arch/x86/hyperv/hv_init.c | 25 +------------------------
arch/x86/include/asm/mshyperv.h | 2 --
drivers/hv/hv_common.c | 22 ++++++++++++++++++++++
include/asm-generic/mshyperv.h | 2 ++
include/hyperv/hvgdk_mini.h | 2 +-
6 files changed, 29 insertions(+), 27 deletions(-)
diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
index fc49949b7df6..29fcfd595f48 100644
--- a/arch/arm64/hyperv/mshyperv.c
+++ b/arch/arm64/hyperv/mshyperv.c
@@ -72,6 +72,9 @@ static int __init hyperv_init(void)
return ret;
}
+ if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
+ hv_get_partition_id();
+
ms_hyperv_late_init();
hyperv_initialized = true;
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 173005e6a95d..9be1446f5bd3 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -34,9 +34,6 @@
#include <clocksource/hyperv_timer.h>
#include <linux/highmem.h>
-u64 hv_current_partition_id = ~0ull;
-EXPORT_SYMBOL_GPL(hv_current_partition_id);
-
void *hv_hypercall_pg;
EXPORT_SYMBOL_GPL(hv_hypercall_pg);
@@ -393,24 +390,6 @@ static void __init hv_stimer_setup_percpu_clockev(void)
old_setup_percpu_clockev();
}
-static void __init hv_get_partition_id(void)
-{
- struct hv_get_partition_id *output_page;
- u64 status;
- unsigned long flags;
-
- local_irq_save(flags);
- output_page = *this_cpu_ptr(hyperv_pcpu_output_arg);
- status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, output_page);
- if (!hv_result_success(status)) {
- /* No point in proceeding if this failed */
- pr_err("Failed to get partition ID: %lld\n", status);
- BUG();
- }
- hv_current_partition_id = output_page->partition_id;
- local_irq_restore(flags);
-}
-
#if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)
static u8 __init get_vtl(void)
{
@@ -605,11 +584,9 @@ void __init hyperv_init(void)
register_syscore_ops(&hv_syscore_ops);
- if (cpuid_ebx(HYPERV_CPUID_FEATURES) & HV_ACCESS_PARTITION_ID)
+ if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
hv_get_partition_id();
- BUG_ON(hv_root_partition && hv_current_partition_id == ~0ull);
-
#ifdef CONFIG_PCI_MSI
/*
* If we're running as root, we want to create our own PCI MSI domain.
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index f91ab1e75f9f..8d3ada3e8d0d 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -43,8 +43,6 @@ extern bool hyperv_paravisor_present;
extern void *hv_hypercall_pg;
-extern u64 hv_current_partition_id;
-
extern union hv_ghcb * __percpu *hv_ghcb_pg;
bool hv_isolation_type_snp(void);
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
index af5d1dc451f6..cb3ea49020ef 100644
--- a/drivers/hv/hv_common.c
+++ b/drivers/hv/hv_common.c
@@ -31,6 +31,9 @@
#include <hyperv/hvhdk.h>
#include <asm/mshyperv.h>
+u64 hv_current_partition_id = HV_PARTITION_ID_SELF;
+EXPORT_SYMBOL_GPL(hv_current_partition_id);
+
/*
* hv_root_partition, ms_hyperv and hv_nested are defined here with other
* Hyper-V specific globals so they are shared across all architectures and are
@@ -283,6 +286,25 @@ static inline bool hv_output_page_exists(void)
return hv_root_partition || IS_ENABLED(CONFIG_HYPERV_VTL_MODE);
}
+void __init hv_get_partition_id(void)
+{
+ struct hv_output_get_partition_id *output;
+ unsigned long flags;
+ u64 status, pt_id;
+
+ local_irq_save(flags);
+ output = *this_cpu_ptr(hyperv_pcpu_input_arg);
+ status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, &output);
+ pt_id = output->partition_id;
+ local_irq_restore(flags);
+
+ if (hv_result_success(status))
+ hv_current_partition_id = pt_id;
+ else
+ pr_err("Hyper-V: failed to get partition ID: %#lx\n",
+ hv_result(status));
+}
+
int __init hv_common_init(void)
{
int i;
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index a7bbe504e4f3..febeddf6cd8a 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -58,6 +58,7 @@ struct ms_hyperv_info {
};
extern struct ms_hyperv_info ms_hyperv;
extern bool hv_nested;
+extern u64 hv_current_partition_id;
extern void * __percpu *hyperv_pcpu_input_arg;
extern void * __percpu *hyperv_pcpu_output_arg;
@@ -207,6 +208,7 @@ extern u64 (*hv_read_reference_counter)(void);
#define VP_INVAL U32_MAX
int __init hv_common_init(void);
+void __init hv_get_partition_id(void);
void __init hv_common_free(void);
void __init ms_hyperv_late_init(void);
int hv_common_cpu_init(unsigned int cpu);
diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index 155615175965..58895883f636 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -182,7 +182,7 @@ struct hv_tsc_emulation_control { /* HV_TSC_INVARIANT_CONTROL */
#endif /* CONFIG_X86 */
-struct hv_get_partition_id { /* HV_OUTPUT_GET_PARTITION_ID */
+struct hv_output_get_partition_id {
u64 partition_id;
} __packed;
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* RE: [PATCH v3 1/2] hyperv: Move hv_current_partition_id to arch-generic code
2025-02-07 19:03 ` [PATCH v3 1/2] hyperv: Move hv_current_partition_id to arch-generic code Nuno Das Neves
@ 2025-02-08 15:44 ` Michael Kelley
0 siblings, 0 replies; 6+ messages in thread
From: Michael Kelley @ 2025-02-08 15:44 UTC (permalink / raw)
To: Nuno Das Neves, linux-hyperv@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
wei.liu@kernel.org
Cc: kys@microsoft.com, haiyangz@microsoft.com, decui@microsoft.com,
catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
x86@kernel.org, hpa@zytor.com, arnd@arndb.de,
jinankjain@linux.microsoft.com, muminulrussell@gmail.com,
skinsburskii@linux.microsoft.com, mukeshrathor@microsoft.com
From: Nuno Das Neves <nunodasneves@linux.microsoft.com> Sent: Friday, February 7, 2025 11:03 AM
>
> Move hv_current_partition_id and hv_get_partition_id() to hv_common.c,
> and call hv_get_partition_id() on arm64 in hyperv_init(). These aren't
> specific to x86_64 and will be needed by common code.
>
> Set hv_current_partition_id to HV_PARTITION_ID_SELF by default.
>
> Rename struct hv_get_partition_id to hv_output_get_partition_id, to
> make it distinct from the function hv_get_partition_id(), and match
> the original Hyper-V struct name.
>
> Remove the BUG()s. Failing to get the id need not crash the machine.
>
> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Looks good now.
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
> ---
> arch/arm64/hyperv/mshyperv.c | 3 +++
> arch/x86/hyperv/hv_init.c | 25 +------------------------
> arch/x86/include/asm/mshyperv.h | 2 --
> drivers/hv/hv_common.c | 22 ++++++++++++++++++++++
> include/asm-generic/mshyperv.h | 2 ++
> include/hyperv/hvgdk_mini.h | 2 +-
> 6 files changed, 29 insertions(+), 27 deletions(-)
>
> diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
> index fc49949b7df6..29fcfd595f48 100644
> --- a/arch/arm64/hyperv/mshyperv.c
> +++ b/arch/arm64/hyperv/mshyperv.c
> @@ -72,6 +72,9 @@ static int __init hyperv_init(void)
> return ret;
> }
>
> + if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
> + hv_get_partition_id();
> +
> ms_hyperv_late_init();
>
> hyperv_initialized = true;
> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> index 173005e6a95d..9be1446f5bd3 100644
> --- a/arch/x86/hyperv/hv_init.c
> +++ b/arch/x86/hyperv/hv_init.c
> @@ -34,9 +34,6 @@
> #include <clocksource/hyperv_timer.h>
> #include <linux/highmem.h>
>
> -u64 hv_current_partition_id = ~0ull;
> -EXPORT_SYMBOL_GPL(hv_current_partition_id);
> -
> void *hv_hypercall_pg;
> EXPORT_SYMBOL_GPL(hv_hypercall_pg);
>
> @@ -393,24 +390,6 @@ static void __init hv_stimer_setup_percpu_clockev(void)
> old_setup_percpu_clockev();
> }
>
> -static void __init hv_get_partition_id(void)
> -{
> - struct hv_get_partition_id *output_page;
> - u64 status;
> - unsigned long flags;
> -
> - local_irq_save(flags);
> - output_page = *this_cpu_ptr(hyperv_pcpu_output_arg);
> - status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, output_page);
> - if (!hv_result_success(status)) {
> - /* No point in proceeding if this failed */
> - pr_err("Failed to get partition ID: %lld\n", status);
> - BUG();
> - }
> - hv_current_partition_id = output_page->partition_id;
> - local_irq_restore(flags);
> -}
> -
> #if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)
> static u8 __init get_vtl(void)
> {
> @@ -605,11 +584,9 @@ void __init hyperv_init(void)
>
> register_syscore_ops(&hv_syscore_ops);
>
> - if (cpuid_ebx(HYPERV_CPUID_FEATURES) & HV_ACCESS_PARTITION_ID)
> + if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
> hv_get_partition_id();
>
> - BUG_ON(hv_root_partition && hv_current_partition_id == ~0ull);
> -
> #ifdef CONFIG_PCI_MSI
> /*
> * If we're running as root, we want to create our own PCI MSI domain.
> diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
> index f91ab1e75f9f..8d3ada3e8d0d 100644
> --- a/arch/x86/include/asm/mshyperv.h
> +++ b/arch/x86/include/asm/mshyperv.h
> @@ -43,8 +43,6 @@ extern bool hyperv_paravisor_present;
>
> extern void *hv_hypercall_pg;
>
> -extern u64 hv_current_partition_id;
> -
> extern union hv_ghcb * __percpu *hv_ghcb_pg;
>
> bool hv_isolation_type_snp(void);
> diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
> index af5d1dc451f6..cb3ea49020ef 100644
> --- a/drivers/hv/hv_common.c
> +++ b/drivers/hv/hv_common.c
> @@ -31,6 +31,9 @@
> #include <hyperv/hvhdk.h>
> #include <asm/mshyperv.h>
>
> +u64 hv_current_partition_id = HV_PARTITION_ID_SELF;
> +EXPORT_SYMBOL_GPL(hv_current_partition_id);
> +
> /*
> * hv_root_partition, ms_hyperv and hv_nested are defined here with other
> * Hyper-V specific globals so they are shared across all architectures and are
> @@ -283,6 +286,25 @@ static inline bool hv_output_page_exists(void)
> return hv_root_partition || IS_ENABLED(CONFIG_HYPERV_VTL_MODE);
> }
>
> +void __init hv_get_partition_id(void)
> +{
> + struct hv_output_get_partition_id *output;
> + unsigned long flags;
> + u64 status, pt_id;
> +
> + local_irq_save(flags);
> + output = *this_cpu_ptr(hyperv_pcpu_input_arg);
> + status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, &output);
> + pt_id = output->partition_id;
> + local_irq_restore(flags);
> +
> + if (hv_result_success(status))
> + hv_current_partition_id = pt_id;
> + else
> + pr_err("Hyper-V: failed to get partition ID: %#lx\n",
> + hv_result(status));
> +}
> +
> int __init hv_common_init(void)
> {
> int i;
> diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
> index a7bbe504e4f3..febeddf6cd8a 100644
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -58,6 +58,7 @@ struct ms_hyperv_info {
> };
> extern struct ms_hyperv_info ms_hyperv;
> extern bool hv_nested;
> +extern u64 hv_current_partition_id;
>
> extern void * __percpu *hyperv_pcpu_input_arg;
> extern void * __percpu *hyperv_pcpu_output_arg;
> @@ -207,6 +208,7 @@ extern u64 (*hv_read_reference_counter)(void);
> #define VP_INVAL U32_MAX
>
> int __init hv_common_init(void);
> +void __init hv_get_partition_id(void);
> void __init hv_common_free(void);
> void __init ms_hyperv_late_init(void);
> int hv_common_cpu_init(unsigned int cpu);
> diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
> index 155615175965..58895883f636 100644
> --- a/include/hyperv/hvgdk_mini.h
> +++ b/include/hyperv/hvgdk_mini.h
> @@ -182,7 +182,7 @@ struct hv_tsc_emulation_control { /*
> HV_TSC_INVARIANT_CONTROL */
>
> #endif /* CONFIG_X86 */
>
> -struct hv_get_partition_id { /* HV_OUTPUT_GET_PARTITION_ID */
> +struct hv_output_get_partition_id {
> u64 partition_id;
> } __packed;
>
> --
> 2.34.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v3 2/2] hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv
2025-02-07 19:03 [PATCH v3 0/2] hyperv: Move some features to common code Nuno Das Neves
2025-02-07 19:03 ` [PATCH v3 1/2] hyperv: Move hv_current_partition_id to arch-generic code Nuno Das Neves
@ 2025-02-07 19:03 ` Nuno Das Neves
2025-02-12 4:11 ` Wei Liu
2025-02-12 4:10 ` [PATCH v3 0/2] hyperv: Move some features to common code Wei Liu
2 siblings, 1 reply; 6+ messages in thread
From: Nuno Das Neves @ 2025-02-07 19:03 UTC (permalink / raw)
To: linux-hyperv, linux-arm-kernel, linux-kernel, linux-arch, wei.liu,
mhklinux
Cc: kys, haiyangz, decui, catalin.marinas, will, tglx, mingo, bp,
dave.hansen, x86, hpa, arnd, jinankjain, muminulrussell,
skinsburskii, mukeshrathor
These helpers are not specific to x86_64 and will be needed by common code.
Remove some unnecessary #includes.
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
---
arch/x86/hyperv/Makefile | 2 +-
arch/x86/include/asm/mshyperv.h | 4 ----
drivers/hv/Makefile | 2 +-
{arch/x86/hyperv => drivers/hv}/hv_proc.c | 4 ----
include/asm-generic/mshyperv.h | 4 ++++
5 files changed, 6 insertions(+), 10 deletions(-)
rename {arch/x86/hyperv => drivers/hv}/hv_proc.c (98%)
diff --git a/arch/x86/hyperv/Makefile b/arch/x86/hyperv/Makefile
index 3a1548054b48..d55f494f471d 100644
--- a/arch/x86/hyperv/Makefile
+++ b/arch/x86/hyperv/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y := hv_init.o mmu.o nested.o irqdomain.o ivm.o
-obj-$(CONFIG_X86_64) += hv_apic.o hv_proc.o
+obj-$(CONFIG_X86_64) += hv_apic.o
obj-$(CONFIG_HYPERV_VTL_MODE) += hv_vtl.o
ifdef CONFIG_X86_64
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 8d3ada3e8d0d..7dfca93ef048 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -56,10 +56,6 @@ u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2);
#define HV_AP_INIT_GPAT_DEFAULT 0x0007040600070406ULL
#define HV_AP_SEGMENT_LIMIT 0xffffffff
-int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
-int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id);
-int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags);
-
/*
* If the hypercall involves no input or output parameters, the hypervisor
* ignores the corresponding GPA pointer.
diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile
index b992c0ed182b..9afcabb3fbd2 100644
--- a/drivers/hv/Makefile
+++ b/drivers/hv/Makefile
@@ -13,4 +13,4 @@ hv_vmbus-$(CONFIG_HYPERV_TESTING) += hv_debugfs.o
hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_utils_transport.o
# Code that must be built-in
-obj-$(subst m,y,$(CONFIG_HYPERV)) += hv_common.o
+obj-$(subst m,y,$(CONFIG_HYPERV)) += hv_common.o hv_proc.o
diff --git a/arch/x86/hyperv/hv_proc.c b/drivers/hv/hv_proc.c
similarity index 98%
rename from arch/x86/hyperv/hv_proc.c
rename to drivers/hv/hv_proc.c
index ac4c834d4435..3e410489f480 100644
--- a/arch/x86/hyperv/hv_proc.c
+++ b/drivers/hv/hv_proc.c
@@ -6,11 +6,7 @@
#include <linux/slab.h>
#include <linux/cpuhotplug.h>
#include <linux/minmax.h>
-#include <asm/hypervisor.h>
#include <asm/mshyperv.h>
-#include <asm/apic.h>
-
-#include <asm/trace/hyperv.h>
/*
* See struct hv_deposit_memory. The first u64 is partition ID, the rest
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index febeddf6cd8a..7adc10a4fa3e 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -218,6 +218,10 @@ void *hv_alloc_hyperv_page(void);
void *hv_alloc_hyperv_zeroed_page(void);
void hv_free_hyperv_page(void *addr);
+int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
+int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id);
+int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags);
+
/**
* hv_cpu_number_to_vp_number() - Map CPU to VP.
* @cpu_number: CPU number in Linux terms
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH v3 2/2] hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv
2025-02-07 19:03 ` [PATCH v3 2/2] hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv Nuno Das Neves
@ 2025-02-12 4:11 ` Wei Liu
0 siblings, 0 replies; 6+ messages in thread
From: Wei Liu @ 2025-02-12 4:11 UTC (permalink / raw)
To: Nuno Das Neves
Cc: linux-hyperv, linux-arm-kernel, linux-kernel, linux-arch, wei.liu,
mhklinux, kys, haiyangz, decui, catalin.marinas, will, tglx,
mingo, bp, dave.hansen, x86, hpa, arnd, jinankjain,
muminulrussell, skinsburskii, mukeshrathor
On Fri, Feb 07, 2025 at 11:03:22AM -0800, Nuno Das Neves wrote:
> These helpers are not specific to x86_64 and will be needed by common code.
> Remove some unnecessary #includes.
>
> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
One comment about the ordering of the tag. You should order them in
chronological order in the future, so the "Reviewed-by" should be after
your SoB.
Thanks,
Wei.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3 0/2] hyperv: Move some features to common code
2025-02-07 19:03 [PATCH v3 0/2] hyperv: Move some features to common code Nuno Das Neves
2025-02-07 19:03 ` [PATCH v3 1/2] hyperv: Move hv_current_partition_id to arch-generic code Nuno Das Neves
2025-02-07 19:03 ` [PATCH v3 2/2] hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv Nuno Das Neves
@ 2025-02-12 4:10 ` Wei Liu
2 siblings, 0 replies; 6+ messages in thread
From: Wei Liu @ 2025-02-12 4:10 UTC (permalink / raw)
To: Nuno Das Neves
Cc: linux-hyperv, linux-arm-kernel, linux-kernel, linux-arch, wei.liu,
mhklinux, kys, haiyangz, decui, catalin.marinas, will, tglx,
mingo, bp, dave.hansen, x86, hpa, arnd, jinankjain,
muminulrussell, skinsburskii, mukeshrathor
On Fri, Feb 07, 2025 at 11:03:20AM -0800, Nuno Das Neves wrote:
> There are several bits of Hyper-V-related code that today live in
> arch/x86 but are not really specific to x86_64 and will work on arm64
> too.
>
> Some of these will be needed in the upcoming mshv driver code (for
> Linux as root partition on Hyper-V). So this is a good time to move
> them to drivers/hv.
>
> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
> ---
> Changes in v3:
> * Just use percpu input page for the hypercall [Michael Kelley]
> * Move the calls to hv_get_partition_id() back to arch code [Michael Kelley]
> * Rename struct hv_get_partition_id to hv_output_get_partition_id
> [Michael Kelley]
>
> Changes in v2:
> * Fix dependence on percpu output page by using a stack variable for the
> hypercall output [Michael Kelley]
> * Remove unnecessary WARN()s [Michael Kelley]
> * Define hv_current_partition_id in hv_common.c [Michael Kelley]
> * Move entire hv_proc.c to drivers/hv [Michael Kelley]
>
> Nuno Das Neves (2):
> hyperv: Move hv_current_partition_id to arch-generic code
> hyperv: Move arch/x86/hyperv/hv_proc.c to drivers/hv
Applied to hyperv-next. Thanks.
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