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[Qemu-devel] [PATCH 2/2] vfio: enable 8-byte reads/writes to vfio
From: |
Jose Ricardo Ziviani |
Subject: |
[Qemu-devel] [PATCH 2/2] vfio: enable 8-byte reads/writes to vfio |
Date: |
Wed, 19 Apr 2017 16:44:43 -0300 |
This patch enables 8-byte writes and reads to VFIO. Such implemention
is already done but it's missing the 'case' to handle such accesses in
both vfio_region_write and vfio_region_read and the MemoryRegionOps:
impl.max_access_size and impl.min_access_size.
After this patch, 8-byte writes such as:
qemu_mutex_lock locked mutex 0x10905ad8
vfio_region_write (0001:03:00.0:region1+0xc0, 0x4140c, 4)
vfio_region_write (0001:03:00.0:region1+0xc4, 0xa0000, 4)
qemu_mutex_unlock unlocked mutex 0x10905ad8
goes like this:
qemu_mutex_lock locked mutex 0x10905ad8
vfio_region_write (0001:03:00.0:region1+0xc0, 0xbfd0008, 8)
qemu_mutex_unlock unlocked mutex 0x10905ad8
Signed-off-by: Jose Ricardo Ziviani <address@hidden>
---
hw/vfio/common.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 145f2f4..43c8e98 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -119,6 +119,9 @@ void vfio_region_write(void *opaque, hwaddr addr,
case 4:
buf.dword = cpu_to_le32(data);
break;
+ case 8:
+ buf.qword = cpu_to_le64(data);
+ break;
default:
hw_error("vfio: unsupported write size, %d bytes", size);
break;
@@ -173,6 +176,9 @@ uint64_t vfio_region_read(void *opaque,
case 4:
data = le32_to_cpu(buf.dword);
break;
+ case 8:
+ data = le64_to_cpu(buf.qword);
+ break;
default:
hw_error("vfio: unsupported read size, %d bytes", size);
break;
@@ -194,6 +200,10 @@ const MemoryRegionOps vfio_region_ops = {
.min_access_size = 1,
.max_access_size = 8,
},
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 8,
+ },
};
/*
--
2.7.4