[XenPPC] [linux-ppc-2.6] [POWERPC][XEN] Use new Xen based Real Time Clock logic in DomUs

[Xen patchbot-linux-ppc-2.6 <patchbot-linux-ppc-2.6@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID bbf2db4ddf5400e908ee6bf92ac798e5cfed82a0
# Parent  c8d1f32fd7deebb9c15e5dc4ec3bcbd3678d9488
[POWERPC][XEN] Use new Xen based Real Time Clock logic in DomUs

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
 arch/powerpc/platforms/xen/Makefile  |    1 
 arch/powerpc/platforms/xen/setup.c   |   10 +--
 arch/powerpc/platforms/xen/setup.h   |    1 
 arch/powerpc/platforms/xen/time.c    |   96 +++++++++++++++++++++++++++++++++++
 include/xen/interface/arch-powerpc.h |    2 
 5 files changed, 104 insertions(+), 6 deletions(-)

diff -r c8d1f32fd7de -r bbf2db4ddf54 arch/powerpc/platforms/xen/Makefile
--- a/arch/powerpc/platforms/xen/Makefile       Wed Nov 22 14:51:54 2006 -0500
+++ b/arch/powerpc/platforms/xen/Makefile       Tue Dec 19 09:22:37 2006 -0500
@@ -3,6 +3,7 @@ obj-y   += hcall.o
 obj-y  += hcall.o
 obj-y  += reboot.o
 obj-y  += setup.o
+obj-y  += time.o
 obj-y  += udbg_xen.o
 obj-y  += xen_guest.o
 obj-y  += xencomm.o
diff -r c8d1f32fd7de -r bbf2db4ddf54 arch/powerpc/platforms/xen/setup.c
--- a/arch/powerpc/platforms/xen/setup.c        Wed Nov 22 14:51:54 2006 -0500
+++ b/arch/powerpc/platforms/xen/setup.c        Tue Dec 19 09:22:37 2006 -0500
@@ -109,12 +109,12 @@ static void __init xen_init_early(void)
        DBG("    console_mfn    %llx\n", xen_start_info->console.domU.mfn);
        DBG("    console_evtchn %x\n", xen_start_info->console.domU.evtchn);
 
+       xen_setup_time(&mach_maple_md);
+
        if (is_initial_xendomain()) {
-               ppc_md.pcibios_fixup            = mach_maple_md.pcibios_fixup;
-               ppc_md.pci_get_legacy_ide_irq   = 
mach_maple_md.pci_get_legacy_ide_irq;
-               ppc_md.get_boot_time            = mach_maple_md.get_boot_time;
-               ppc_md.set_rtc_time             = mach_maple_md.set_rtc_time;
-               ppc_md.get_rtc_time             = mach_maple_md.get_rtc_time;
+               ppc_md.pcibios_fixup = mach_maple_md.pcibios_fixup;
+               ppc_md.pci_get_legacy_ide_irq =
+                       mach_maple_md.pci_get_legacy_ide_irq;
 
                add_preferred_console("ttyS", 0, NULL);
        }
diff -r c8d1f32fd7de -r bbf2db4ddf54 arch/powerpc/platforms/xen/setup.h
--- a/arch/powerpc/platforms/xen/setup.h        Wed Nov 22 14:51:54 2006 -0500
+++ b/arch/powerpc/platforms/xen/setup.h        Tue Dec 19 09:22:37 2006 -0500
@@ -26,3 +26,4 @@ extern struct page *alloc_foreign_page(v
 extern struct page *alloc_foreign_page(void);
 extern void free_foreign_page(struct page *page);
 
+extern void __init xen_setup_time(struct machdep_calls *host_md);
diff -r c8d1f32fd7de -r bbf2db4ddf54 include/xen/interface/arch-powerpc.h
--- a/include/xen/interface/arch-powerpc.h      Wed Nov 22 14:51:54 2006 -0500
+++ b/include/xen/interface/arch-powerpc.h      Tue Dec 19 09:22:37 2006 -0500
@@ -108,7 +108,7 @@ DEFINE_XEN_GUEST_HANDLE(vcpu_guest_conte
 DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
 
 struct arch_shared_info {
-    uint64_t pad[32];
+    uint64_t boot_timebase;
 };
 
 struct arch_vcpu_info {
diff -r c8d1f32fd7de -r bbf2db4ddf54 arch/powerpc/platforms/xen/time.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/powerpc/platforms/xen/time.c Tue Dec 19 09:22:37 2006 -0500
@@ -0,0 +1,96 @@
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/rtc.h>
+#include <asm/hypervisor.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/udbg.h>
+
+#define DEBUG
+
+#ifdef DEBUG
+#define DBG(fmt...) printk(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+static inline ulong time_from_shared(void)
+{
+       ulong t;
+
+       DBG("tb_freq: %ld\n", ppc_tb_freq);
+       
+       t = mftb() - HYPERVISOR_shared_info->arch.boot_timebase;
+       t /= ppc_tb_freq;
+       t += HYPERVISOR_shared_info->wc_sec;
+
+       return t;
+}
+
+static void (*host_md_get_rtc_time)(struct rtc_time *tm);
+static void xen_get_rtc_time(struct rtc_time *tm)
+{
+       if (is_initial_xendomain()) {
+               host_md_get_rtc_time(tm);
+               return;
+       } else {
+               ulong t;
+
+               t = time_from_shared();
+               to_tm(t, tm);
+       }
+}
+
+static int (*host_md_set_rtc_time)(struct rtc_time *tm);
+static int xen_set_rtc_time(struct rtc_time *tm)
+{
+       ulong sec;
+
+       if (is_initial_xendomain()) {
+               host_md_set_rtc_time(tm);
+               return 0;
+       }
+
+       sec = mktime(tm->tm_year, tm->tm_mon, tm->tm_mday,
+                    tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+       HYPERVISOR_shared_info->wc_sec = sec;
+       HYPERVISOR_shared_info->arch.boot_timebase = mftb();
+
+       return 0;
+}
+
+static unsigned long (*host_md_get_boot_time)(void);
+static unsigned long __init xen_get_boot_time(void)
+{
+       ulong t;
+
+       if (is_initial_xendomain()) {
+               t = host_md_get_boot_time();
+
+               HYPERVISOR_shared_info->wc_sec = t;
+               HYPERVISOR_shared_info->arch.boot_timebase = mftb();
+               DBG("%s: time: %ld\n", __func__, t);
+       } else {
+               t = time_from_shared();
+               DBG("%s: %ld\n", __func__, t);
+       }
+       return t;
+}
+
+void __init xen_setup_time(struct machdep_calls *host_md)
+{
+       ppc_md.get_boot_time = xen_get_boot_time;
+       host_md_get_boot_time = host_md->get_boot_time;
+
+
+       ppc_md.set_rtc_time = xen_set_rtc_time;
+       host_md_set_rtc_time = host_md->set_rtc_time;
+
+
+       ppc_md.get_rtc_time = xen_get_rtc_time;
+       host_md_get_rtc_time = host_md->get_rtc_time;
+}
+
+
+       

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