Commit-ID: be778308e879d3529e92fb4fecebde48fcafc6a5
Gitweb: http://git.kernel.org/tip/be778308e879d3529e92fb4fecebde48fcafc6a5
Author: Pekka Enberg <penberg@xxxxxxxxxx>
AuthorDate: Mon, 28 Nov 2011 21:02:19 +0200
Committer: Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Mon, 28 Nov 2011 21:02:19 +0200
kvm tools, rtc: Nonvolatile BIOS memory support
This adds a ->cmos_data array to 'struct rtc_device' that is used to emulate
nonvolatile BIOS memory and the RTC registers.
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
tools/kvm/hw/rtc.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/hw/rtc.c b/tools/kvm/hw/rtc.c
index 0dc6223..6d4a05a 100644
--- a/tools/kvm/hw/rtc.c
+++ b/tools/kvm/hw/rtc.c
@@ -26,6 +26,7 @@
struct rtc_device {
u8 cmos_idx;
+ u8 cmos_data[128];
};
static struct rtc_device rtc;
@@ -66,6 +67,9 @@ static bool cmos_ram_data_in(struct ioport *ioport, struct kvm *kvm, u16 port, v
case RTC_YEAR:
ioport__write8(data, bin2bcd(tm->tm_year));
break;
+ default:
+ ioport__write8(data, rtc.cmos_data[rtc.cmos_idx]);
+ break;
}
return true;
@@ -73,6 +77,16 @@ static bool cmos_ram_data_in(struct ioport *ioport, struct kvm *kvm, u16 port, v
static bool cmos_ram_data_out(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size)
{
+ switch (rtc.cmos_idx) {
+ case RTC_REG_C:
+ case RTC_REG_D:
+ /* Read-only */
+ break;
+ default:
+ rtc.cmos_data[rtc.cmos_idx] = ioport__read8(data);
+ break;
+ }
+
return true;
}
--
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