RE: [PATCH] hw/xen: set pci Atomic Ops requests for passthrough device

[Ji, Ruili]

[AMD Official Use Only - General]

FYI

 

From: Ji, Ruili
Sent: 2022年9月6日 15:40
To: qemu-devel@nongnu.org
Cc: Liu, Aaron <Aaron.Liu@amd.com>
Subject: [PATCH] hw/xen: set pci Atomic Ops requests for passthrough device

 

From c54e0714a1e1cac7dc416bd843b9ec7162bcfc47 Mon Sep 17 00:00:00 2001

From: Ruili Ji ruili.ji@amd.com

Date: Tue, 6 Sep 2022 14:09:41 +0800

Subject: [PATCH] hw/xen: set pci Atomic Ops requests for passthrough device

 

Make guest os access pci device control 2 reg for passthrough device

as struct XenPTRegInfo described in the file hw/xen/xen_pt.h.

/* reg read only field mask (ON:RO/ROS, OFF:other) */

uint32_t ro_mask;

/* reg emulate field mask (ON:emu, OFF:passthrough) */

uint32_t emu_mask;

 

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1196

Signed-off-by: Aaron.Liu@amd.com

Signed-off-by: ruili.ji@amd.com

---

hw/xen/xen_pt_config_init.c | 4 ++--

1 file changed, 2 insertions(+), 2 deletions(-)

 

diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c

index c5c4e943a8..adc565a00a 100644

--- a/hw/xen/xen_pt_config_init.c

+++ b/hw/xen/xen_pt_config_init.c

@@ -985,8 +985,8 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {

         .offset     = 0x28,

         .size       = 2,

         .init_val   = 0x0000,

-        .ro_mask    = 0xFFE0,

-        .emu_mask   = 0xFFFF,

+        .ro_mask    = 0xFFA0,

+        .emu_mask   = 0xFFBF,

         .init       = xen_pt_devctrl2_reg_init,

         .u.w.read   = xen_pt_word_reg_read,

         .u.w.write  = xen_pt_word_reg_write,

--

2.34.1