Skip to content
Snippets Groups Projects
Commit 4b44f2d1 authored by Stephan Mueller's avatar Stephan Mueller Committed by Theodore Ts'o
Browse files

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: default avatarStephan Mueller <stephan.mueller@atsec.com>
Signed-off-by: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 9b4d0087
No related merge requests found
...@@ -946,6 +946,7 @@ void add_interrupt_randomness(int irq, int irq_flags) ...@@ -946,6 +946,7 @@ void add_interrupt_randomness(int irq, int irq_flags)
/* award one bit for the contents of the fast pool */ /* award one bit for the contents of the fast pool */
credit_entropy_bits(r, credit + 1); credit_entropy_bits(r, credit + 1);
} }
EXPORT_SYMBOL_GPL(add_interrupt_randomness);
#ifdef CONFIG_BLOCK #ifdef CONFIG_BLOCK
void add_disk_randomness(struct gendisk *disk) void add_disk_randomness(struct gendisk *disk)
......
...@@ -42,6 +42,7 @@ ...@@ -42,6 +42,7 @@
#include <linux/screen_info.h> #include <linux/screen_info.h>
#include <linux/kdebug.h> #include <linux/kdebug.h>
#include <linux/efi.h> #include <linux/efi.h>
#include <linux/random.h>
#include "hyperv_vmbus.h" #include "hyperv_vmbus.h"
static struct acpi_device *hv_acpi_dev; static struct acpi_device *hv_acpi_dev;
...@@ -806,6 +807,8 @@ static void vmbus_isr(void) ...@@ -806,6 +807,8 @@ static void vmbus_isr(void)
else else
tasklet_schedule(hv_context.msg_dpc[cpu]); tasklet_schedule(hv_context.msg_dpc[cpu]);
} }
add_interrupt_randomness(HYPERVISOR_CALLBACK_VECTOR, 0);
} }
......
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment