[PATCH v3 03/15] mshyperv: Introduce numa_node_to_proximity_domain_info

Nuno Das Neves
2023-09-22T18:38:49Z

Factor out logic for converting numa node to proximity domain info into
a helper function, and export it.

Change hv_proximity_domain_info to a struct to simplify the code.

Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
---
arch/x86/hyperv/hv_proc.c | 8 ++------
drivers/acpi/numa/srat.c | 1 +
include/asm-generic/hyperv-tlfs.h | 14 +++++---------
include/asm-generic/mshyperv.h | 15 +++++++++++++++
4 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/arch/x86/hyperv/hv_proc.c b/arch/x86/hyperv/hv_proc.c
index 68a0843d4750..5ba5ca1b2089 100644
--- a/arch/x86/hyperv/hv_proc.c
+++ b/arch/x86/hyperv/hv_proc.c
@@ -121,7 +121,6 @@ int hv_call_add_logical_proc(int node, u32 lp_index, u32 apic_id)
u64 status;
unsigned long flags;
int ret = HV_STATUS_SUCCESS;
- int pxm = node_to_pxm(node);

/*
* When adding a logical processor, the hypervisor may return
@@ -137,11 +136,8 @@ int hv_call_add_logical_proc(int node, u32 lp_index, u32 apic_id)

input->lp_index = lp_index;
input->apic_id = apic_id;
- input->flags = 0;
- input->proximity_domain_info.domain_id = pxm;
- input->proximity_domain_info.flags.reserved = 0;
- input->proximity_domain_info.flags.proximity_info_valid = 1;
- input->proximity_domain_info.flags.proximity_preferred = 1;
+ input->proximity_domain_info =
+ numa_node_to_proximity_domain_info(node);
status = hv_do_hypercall(HVCALL_ADD_LOGICAL_PROCESSOR,
input, output);
local_irq_restore(flags);
diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
index 1f4fc5f8a819..0cf9f0574495 100644
--- a/drivers/acpi/numa/srat.c
+++ b/drivers/acpi/numa/srat.c
@@ -48,6 +48,7 @@ int node_to_pxm(int node)
return PXM_INVAL;
return node_to_pxm_map[node];
}
+EXPORT_SYMBOL(node_to_pxm);

static void __acpi_map_pxm_to_node(int pxm, int node)
{
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index f63b3704d89e..a6dffb346bf2 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -512,13 +512,9 @@ struct hv_proximity_domain_flags {
u32 proximity_info_valid : 1;
} __packed;

-/* Not a union in windows but useful for zeroing */
-union hv_proximity_domain_info {
- struct {
- u32 domain_id;
- struct hv_proximity_domain_flags flags;
- };
- u64 as_uint64;
+struct hv_proximity_domain_info {
+ u32 domain_id;
+ struct hv_proximity_domain_flags flags;
} __packed;

struct hv_lp_startup_status {
@@ -535,7 +531,7 @@ struct hv_lp_startup_status {
struct hv_add_logical_processor_in {
u32 lp_index;
u32 apic_id;
- union hv_proximity_domain_info proximity_domain_info;
+ struct hv_proximity_domain_info proximity_domain_info;
u64 flags;
} __packed;

@@ -560,7 +556,7 @@ struct hv_create_vp {
u8 padding[3];
u8 subnode_type;
u64 subnode_id;
- union hv_proximity_domain_info proximity_domain_info;
+ struct hv_proximity_domain_info proximity_domain_info;
u64 flags;
} __packed;

diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index 5b3512e5a72e..e16557523b6e 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -21,6 +21,7 @@
#include <linux/types.h>
#include <linux/atomic.h>
#include <linux/bitops.h>
+#include <acpi/acpi_numa.h>
#include <linux/cpumask.h>
#include <linux/nmi.h>
#include <asm/ptrace.h>
@@ -28,6 +29,20 @@

#define VTPM_BASE_ADDRESS 0xfed40000

+static inline struct hv_proximity_domain_info
+numa_node_to_proximity_domain_info(int node)
+{
+ struct hv_proximity_domain_info proximity_domain_info = {};
+
+ if (node != NUMA_NO_NODE) {
+ proximity_domain_info.domain_id = node_to_pxm(node);
+ proximity_domain_info.flags.proximity_info_valid = 1;
+ proximity_domain_info.flags.proximity_preferred = 1;
+ }
+
+ return proximity_domain_info;
+}
+
struct ms_hyperv_info {
u32 features;
u32 priv_high;
--
2.25.1