|
|
0a122b |
From 1d59e428d7754c0fc331092d265254a0b3473546 Mon Sep 17 00:00:00 2001
|
|
|
0a122b |
From: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
0a122b |
Date: Wed, 11 Dec 2013 10:04:22 +0100
|
|
|
0a122b |
Subject: [PATCH 1/5] xhci: add support for suspend/resume
|
|
|
0a122b |
|
|
|
0a122b |
RH-Author: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
0a122b |
Message-id: <1386756262-29763-2-git-send-email-kraxel@redhat.com>
|
|
|
0a122b |
Patchwork-id: 56161
|
|
|
0a122b |
O-Subject: [RHEL-7 qemu-kvm PATCH 1/1] xhci: add support for suspend/resume
|
|
|
0a122b |
Bugzilla: 1012365
|
|
|
0a122b |
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
|
|
|
0a122b |
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
0a122b |
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
0a122b |
|
|
|
0a122b |
The OS can ask the xhci controller to save and restore its
|
|
|
0a122b |
internal state, which is used by the OS when the system is
|
|
|
0a122b |
suspended and resumed.
|
|
|
0a122b |
|
|
|
0a122b |
This patch handles writes to the save + restore bits in the
|
|
|
0a122b |
command register. Only thing it does is updating the
|
|
|
0a122b |
restore error bit in the status register to signal an error
|
|
|
0a122b |
on restore. The guest OS should do a full reinitialization
|
|
|
0a122b |
after resume then.
|
|
|
0a122b |
|
|
|
0a122b |
This is the minimal patch which gets S3 going with xhci.
|
|
|
0a122b |
Implementing full save/restore support is TBD.
|
|
|
0a122b |
|
|
|
0a122b |
https:
|
|
|
0a122b |
|
|
|
0a122b |
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
0a122b |
(cherry picked from commit f1f8bc218a422081f36f0b325b3de5e6a5078b74)
|
|
|
0a122b |
|
|
|
0a122b |
hw/usb/hcd-xhci.c | 8 ++++++++
|
|
|
0a122b |
1 file changed, 8 insertions(+)
|
|
|
0a122b |
|
|
|
0a122b |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
0a122b |
|
|
|
0a122b |
hw/usb/hcd-xhci.c | 8 ++++++++
|
|
|
0a122b |
1 files changed, 8 insertions(+), 0 deletions(-)
|
|
|
0a122b |
|
|
|
0a122b |
diff
|
|
|
0a122b |
index 9d7315f..87ba7af 100644
|
|
|
0a122b |
|
|
|
0a122b |
|
|
|
0a122b |
@@ -2976,6 +2976,14 @@ static void xhci_oper_write(void *ptr, hwaddr reg,
|
|
|
0a122b |
} else if (!(val & USBCMD_RS) && (xhci->usbcmd & USBCMD_RS)) {
|
|
|
0a122b |
xhci_stop(xhci);
|
|
|
0a122b |
}
|
|
|
0a122b |
+ if (val & USBCMD_CSS) {
|
|
|
0a122b |
+ /* save state */
|
|
|
0a122b |
+ xhci->usbsts &= ~USBSTS_SRE;
|
|
|
0a122b |
+ }
|
|
|
0a122b |
+ if (val & USBCMD_CRS) {
|
|
|
0a122b |
+ /* restore state */
|
|
|
0a122b |
+ xhci->usbsts |= USBSTS_SRE;
|
|
|
0a122b |
+ }
|
|
|
0a122b |
xhci->usbcmd = val & 0xc0f;
|
|
|
0a122b |
xhci_mfwrap_update(xhci);
|
|
|
0a122b |
if (val & USBCMD_HCRST) {
|
|
|
0a122b |
--
|
|
|
0a122b |
1.7.1
|
|
|
0a122b |
|