From: longli@linuxonhyperv.com
To: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Long Li <longli@microsoft.com>
Subject: [Patch v2 4/4] Drivers: hv: Remove hv_free/alloc_* helpers
Date: Wed, 30 Apr 2025 15:05:58 -0700 [thread overview]
Message-ID: <1746050758-6829-5-git-send-email-longli@linuxonhyperv.com> (raw)
In-Reply-To: <1746050758-6829-1-git-send-email-longli@linuxonhyperv.com>
From: Long Li <longli@microsoft.com>
Those helpers are simply wrappers for page allocations.
Signed-off-by: Long Li <longli@microsoft.com>
---
drivers/hv/connection.c | 23 +++++++++++++++++------
drivers/hv/hv_common.c | 24 ------------------------
include/asm-generic/mshyperv.h | 4 ----
3 files changed, 17 insertions(+), 34 deletions(-)
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 8351360bba16..a0160b73b593 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -206,11 +206,20 @@ int vmbus_connect(void)
INIT_LIST_HEAD(&vmbus_connection.chn_list);
mutex_init(&vmbus_connection.channel_mutex);
+ /*
+ * The following Hyper-V interrupt and monitor pages can be used by
+ * UIO for mapping to user-space, it should always be allocated on
+ * system page boundaries. We use page allocation functions to allocate
+ * those pages. We assume system page be bigger than Hyper-v page.
+ */
+ BUILD_BUG_ON(PAGE_SIZE < HV_HYP_PAGE_SIZE);
+
/*
* Setup the vmbus event connection for channel interrupt
* abstraction stuff
*/
- vmbus_connection.int_page = hv_alloc_hyperv_zeroed_page();
+ vmbus_connection.int_page =
+ (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
if (vmbus_connection.int_page == NULL) {
ret = -ENOMEM;
goto cleanup;
@@ -225,8 +234,8 @@ int vmbus_connect(void)
* Setup the monitor notification facility. The 1st page for
* parent->child and the 2nd page for child->parent
*/
- vmbus_connection.monitor_pages[0] = hv_alloc_hyperv_page();
- vmbus_connection.monitor_pages[1] = hv_alloc_hyperv_page();
+ vmbus_connection.monitor_pages[0] = (void *)__get_free_page(GFP_KERNEL);
+ vmbus_connection.monitor_pages[1] = (void *)__get_free_page(GFP_KERNEL);
if ((vmbus_connection.monitor_pages[0] == NULL) ||
(vmbus_connection.monitor_pages[1] == NULL)) {
ret = -ENOMEM;
@@ -342,21 +351,23 @@ void vmbus_disconnect(void)
destroy_workqueue(vmbus_connection.work_queue);
if (vmbus_connection.int_page) {
- hv_free_hyperv_page(vmbus_connection.int_page);
+ free_page((unsigned long)vmbus_connection.int_page);
vmbus_connection.int_page = NULL;
}
if (vmbus_connection.monitor_pages[0]) {
if (!set_memory_encrypted(
(unsigned long)vmbus_connection.monitor_pages[0], 1))
- hv_free_hyperv_page(vmbus_connection.monitor_pages[0]);
+ free_page((unsigned long)
+ vmbus_connection.monitor_pages[0]);
vmbus_connection.monitor_pages[0] = NULL;
}
if (vmbus_connection.monitor_pages[1]) {
if (!set_memory_encrypted(
(unsigned long)vmbus_connection.monitor_pages[1], 1))
- hv_free_hyperv_page(vmbus_connection.monitor_pages[1]);
+ free_page((unsigned long)
+ vmbus_connection.monitor_pages[1]);
vmbus_connection.monitor_pages[1] = NULL;
}
}
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
index 297ccd7d4997..421376cea17e 100644
--- a/drivers/hv/hv_common.c
+++ b/drivers/hv/hv_common.c
@@ -105,30 +105,6 @@ void __init hv_common_free(void)
hv_synic_eventring_tail = NULL;
}
-/*
- * A Hyper-V page can be used by UIO for mapping to user-space, it should
- * always be allocated on system page boundaries.
- */
-void *hv_alloc_hyperv_page(void)
-{
- BUILD_BUG_ON(PAGE_SIZE < HV_HYP_PAGE_SIZE);
- return (void *)__get_free_page(GFP_KERNEL);
-}
-EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
-
-void *hv_alloc_hyperv_zeroed_page(void)
-{
- BUILD_BUG_ON(PAGE_SIZE < HV_HYP_PAGE_SIZE);
- return (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
-}
-EXPORT_SYMBOL_GPL(hv_alloc_hyperv_zeroed_page);
-
-void hv_free_hyperv_page(void *addr)
-{
- free_page((unsigned long)addr);
-}
-EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
-
static void *hv_panic_page;
/*
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index ccccb1cbf7df..4033508fbb11 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -236,10 +236,6 @@ int hv_common_cpu_init(unsigned int cpu);
int hv_common_cpu_die(unsigned int cpu);
void hv_identify_partition_type(void);
-void *hv_alloc_hyperv_page(void);
-void *hv_alloc_hyperv_zeroed_page(void);
-void hv_free_hyperv_page(void *addr);
-
/**
* hv_cpu_number_to_vp_number() - Map CPU to VP.
* @cpu_number: CPU number in Linux terms
--
2.34.1
next prev parent reply other threads:[~2025-04-30 22:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-30 22:05 [Patch v2 0/4] Fix uio_hv_generic on systems with >4k page sizes longli
2025-04-30 22:05 ` [Patch v2 1/4] Drivers: hv: Allocate interrupt and monitor pages aligned to system page boundary longli
2025-05-01 1:55 ` Michael Kelley
2025-05-06 0:58 ` Long Li
2025-04-30 22:05 ` [Patch v2 2/4] uio_hv_generic: Use correct size for interrupt and monitor pages longli
2025-05-01 1:55 ` Michael Kelley
2025-04-30 22:05 ` [Patch v2 3/4] uio_hv_generic: Adjust ring size according to system page alignment longli
2025-05-01 1:56 ` Michael Kelley
2025-04-30 22:05 ` longli [this message]
2025-05-01 1:56 ` [Patch v2 4/4] Drivers: hv: Remove hv_free/alloc_* helpers Michael Kelley
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