[PATCH] mshv: expose hv_call_scrub_partition

[PATCH] mshv: expose hv_call_scrub_partition

[Magnus Kulke]

This hv call needs to be exposed for VMMs to be able to soft-reboot
guests. It will reset APIC and state of para-virtualized devices like
SynIC.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
---
 drivers/hv/mshv_root_main.c | 1 +
 include/hyperv/hvgdk_mini.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/hv/mshv_root_main.c b/drivers/hv/mshv_root_main.c
index cb2729f99e2c5..7c13d5f36437c 100644
--- a/drivers/hv/mshv_root_main.c
+++ b/drivers/hv/mshv_root_main.c
@@ -143,6 +143,7 @@ static u16 mshv_passthru_hvcalls[] = {
 	HVCALL_READ_GPA,
 	HVCALL_WRITE_GPA,
 	HVCALL_CLEAR_VIRTUAL_INTERRUPT,
+	HVCALL_SCRUB_PARTITION,
 	HVCALL_REGISTER_INTERCEPT_RESULT,
 	HVCALL_ASSERT_VIRTUAL_INTERRUPT,
 	HVCALL_GET_GPA_PAGES_ACCESS_STATES,
diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index f98eb41342d40..9120fcf0161a4 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -501,6 +501,7 @@ union hv_vp_assist_msr_contents {	 /* HV_REGISTER_VP_ASSIST_PAGE */
 #define HVCALL_ENTER_SLEEP_STATE			0x0084
 #define HVCALL_NOTIFY_PARTITION_EVENT			0x0087
 #define HVCALL_NOTIFY_PORT_RING_EMPTY			0x008b
+#define HVCALL_SCRUB_PARTITION				0x008d
 #define HVCALL_REGISTER_INTERCEPT_RESULT		0x0091
 #define HVCALL_ASSERT_VIRTUAL_INTERRUPT			0x0094
 #define HVCALL_CREATE_PORT				0x0095
-- 
2.34.1

Re: [PATCH] mshv: expose hv_call_scrub_partition

[Wei Liu]

On Wed, Feb 18, 2026 at 03:19:11PM +0100, Magnus Kulke wrote:
> This hv call needs to be exposed for VMMs to be able to soft-reboot
> guests. It will reset APIC and state of para-virtualized devices like
> SynIC.
> 
> Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>

Applied to hyperv-next. Thanks.