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authorStephan Mueller <smueller@chronox.de>2016-05-02 06:14:34 (GMT)
committerTheodore Ts'o <tytso@mit.edu>2016-06-13 15:54:33 (GMT)
commit4b44f2d18a330565227a7348844493c59366171e (patch)
tree5a995230ac3e2e56bc3042385a2f585c31e9389d /drivers/hv
parent9b4d008787f864f17d008c9c15bbe8a0f7e2fc24 (diff)
downloadlinux-4b44f2d18a330565227a7348844493c59366171e.tar.xz
random: add interrupt callback to VMBus IRQ handler
The Hyper-V Linux Integration Services use the VMBus implementation for communication with the Hypervisor. VMBus registers its own interrupt handler that completely bypasses the common Linux interrupt handling. This implies that the interrupt entropy collector is not triggered. This patch adds the interrupt entropy collection callback into the VMBus interrupt handler function. Cc: stable@kernel.org Signed-off-by: Stephan Mueller <stephan.mueller@atsec.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/vmbus_drv.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 952f20f..e82f7e1 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -42,6 +42,7 @@
#include <linux/screen_info.h>
#include <linux/kdebug.h>
#include <linux/efi.h>
+#include <linux/random.h>
#include "hyperv_vmbus.h"
static struct acpi_device *hv_acpi_dev;
@@ -806,6 +807,8 @@ static void vmbus_isr(void)
else
tasklet_schedule(hv_context.msg_dpc[cpu]);
}
+
+ add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0);
}