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[Qemu-devel] [RFC v2 2/2] pmem: device flush over VIRTIO
From: |
Pankaj Gupta |
Subject: |
[Qemu-devel] [RFC v2 2/2] pmem: device flush over VIRTIO |
Date: |
Wed, 25 Apr 2018 16:54:14 +0530 |
This patch adds functionality to perform
flush from guest to hosy over VIRTIO
when 'ND_REGION_VIRTIO'flag is set on
nd_negion. Flag is set by 'virtio-pmem'
driver.
Signed-off-by: Pankaj Gupta <address@hidden>
---
drivers/nvdimm/region_devs.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index a612be6..6c6454e 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -20,6 +20,7 @@
#include <linux/nd.h>
#include "nd-core.h"
#include "nd.h"
+#include <linux/virtio_pmem.h>
/*
* For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is
@@ -1074,6 +1075,12 @@ void nvdimm_flush(struct nd_region *nd_region)
struct nd_region_data *ndrd = dev_get_drvdata(&nd_region->dev);
int i, idx;
+ /* call PV device flush */
+ if (test_bit(ND_REGION_VIRTIO, &nd_region->flags)) {
+ virtio_pmem_flush(&nd_region->dev);
+ return;
+ }
+
/*
* Try to encourage some diversity in flush hint addresses
* across cpus assuming a limited number of flush hints.
--
2.9.3
- Re: [Qemu-devel] [RFC v2 1/2] virtio: add pmem driver, (continued)
Re: [Qemu-devel] [RFC v2 1/2] virtio: add pmem driver, Michael S. Tsirkin, 2018/04/25
Re: [Qemu-devel] [RFC v2 1/2] virtio: add pmem driver, Stefan Hajnoczi, 2018/04/26
[Qemu-devel] [RFC v2 2/2] pmem: device flush over VIRTIO,
Pankaj Gupta <=
[Qemu-devel] [RFC v2] qemu: Add virtio pmem device, Pankaj Gupta, 2018/04/25