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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [HVM] Save/restore: save HPET registers
# HG changeset patch
# User Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
# Date 1170267300 0
# Node ID 6db6b5df4f6f1ebe94738c3624d19e6b4053bcf3
# Parent 5d09e6098f93da0f4cd96c21b6ab0230a38e5048
[HVM] Save/restore: save HPET registers
Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
---
xen/arch/x86/hvm/hpet.c | 44 +++++++++++++++++++++++++++++++++++-------
xen/include/asm-x86/hvm/vpt.h | 25 +++--------------------
xen/include/public/hvm/save.h | 32 +++++++++++++++++++++++++++++-
3 files changed, 72 insertions(+), 29 deletions(-)
diff -r 5d09e6098f93 -r 6db6b5df4f6f xen/arch/x86/hvm/hpet.c
--- a/xen/arch/x86/hvm/hpet.c Wed Jan 31 17:22:17 2007 +0000
+++ b/xen/arch/x86/hvm/hpet.c Wed Jan 31 18:15:00 2007 +0000
@@ -279,7 +279,7 @@ static void hpet_write(
(h->hpet.timers[tn].config & HPET_TN_SETVAL) )
h->hpet.timers[tn].cmp = new_val;
else
- h->period[tn] = new_val;
+ h->hpet.period[tn] = new_val;
h->hpet.timers[tn].config &= ~HPET_TN_SETVAL;
if ( hpet_enabled(h) && timer_enabled(h, tn) )
hpet_set_timer(h, tn);
@@ -289,7 +289,7 @@ static void hpet_write(
case HPET_T1_ROUTE:
case HPET_T2_ROUTE:
tn = (addr - HPET_T0_ROUTE) >> 5;
- h->hpet.timers[tn].hpet_fsb[0] = new_val;
+ h->hpet.timers[tn].fsb = new_val;
break;
default:
@@ -351,21 +351,22 @@ static void hpet_timer_fn(void *opaque)
hpet_route_interrupt(h, tn);
- if ( timer_is_periodic(h, tn) && (h->period[tn] != 0) )
+ if ( timer_is_periodic(h, tn) && (h->hpet.period[tn] != 0) )
{
uint64_t mc = hpet_read_maincounter(h);
if ( timer_is_32bit(h, tn) )
{
while ( hpet_time_after(mc, h->hpet.timers[tn].cmp) )
h->hpet.timers[tn].cmp = (uint32_t)(
- h->hpet.timers[tn].cmp + h->period[tn]);
+ h->hpet.timers[tn].cmp + h->hpet.period[tn]);
}
else
{
while ( hpet_time_after64(mc, h->hpet.timers[tn].cmp) )
- h->hpet.timers[tn].cmp += h->period[tn];
- }
- set_timer(&h->timers[tn], NOW() + hpet_tick_to_ns(h, h->period[tn]));
+ h->hpet.timers[tn].cmp += h->hpet.period[tn];
+ }
+ set_timer(&h->timers[tn],
+ NOW() + hpet_tick_to_ns(h, h->hpet.period[tn]));
}
}
@@ -377,6 +378,35 @@ void hpet_migrate_timers(struct vcpu *v)
for ( i = 0; i < HPET_TIMER_NUM; i++ )
migrate_timer(&h->timers[i], v->processor);
}
+
+static int hpet_save(struct domain *d, hvm_domain_context_t *h)
+{
+ HPETState *hp = &d->arch.hvm_domain.pl_time.vhpet;
+
+ /* Save the HPET registers */
+ return hvm_save_entry(HPET, 0, h, &hp->hpet);
+}
+
+static int hpet_load(struct domain *d, hvm_domain_context_t *h)
+{
+ HPETState *hp = &d->arch.hvm_domain.pl_time.vhpet;
+ int i;
+
+ /* Reload the HPET registers */
+ if ( hvm_load_entry(HPET, h, &hp->hpet) )
+ return -EINVAL;
+
+ /* Recalculate the offset between the main counter and guest time */
+ hp->mc_offset = hp->hpet.mc64 - hvm_get_guest_time(hp->vcpu);
+
+ /* Restart the timers */
+ for ( i = 0; i < HPET_TIMER_NUM; i++ )
+ hpet_set_timer(hp, i);
+
+ return 0;
+}
+
+HVM_REGISTER_SAVE_RESTORE(HPET, hpet_save, hpet_load);
void hpet_init(struct vcpu *v)
{
diff -r 5d09e6098f93 -r 6db6b5df4f6f xen/include/asm-x86/hvm/vpt.h
--- a/xen/include/asm-x86/hvm/vpt.h Wed Jan 31 17:22:17 2007 +0000
+++ b/xen/include/asm-x86/hvm/vpt.h Wed Jan 31 18:15:00 2007 +0000
@@ -31,22 +31,6 @@
#include <asm/hvm/vpic.h>
#include <public/hvm/save.h>
-#define HPET_TIMER_NUM 3 /* 3 timers supported now */
-struct HPET {
- uint64_t capability; /* capabilities */
- uint64_t res0; /* reserved */
- uint64_t config; /* configuration */
- uint64_t res1; /* reserved */
- uint64_t isr; /* interrupt status reg */
- uint64_t res2[25]; /* reserved */
- uint64_t mc64; /* main counter */
- uint64_t res3; /* reserved */
- struct { /* timers */
- uint64_t config; /* configuration/cap */
- uint64_t cmp; /* comparator */
- uint64_t hpet_fsb[2]; /* FSB route, not supported now */
- } timers[HPET_TIMER_NUM];
-};
struct HPETState;
struct HPET_timer_fn_info {
@@ -55,11 +39,10 @@ struct HPET_timer_fn_info {
};
typedef struct HPETState {
- struct HPET hpet;
- struct vcpu *vcpu;
- uint64_t tsc_freq;
- uint64_t mc_offset;
- uint64_t period[HPET_TIMER_NUM];
+ struct hvm_hw_hpet hpet;
+ struct vcpu *vcpu;
+ uint64_t tsc_freq;
+ uint64_t mc_offset;
struct timer timers[HPET_TIMER_NUM];
struct HPET_timer_fn_info timer_fn_info[HPET_TIMER_NUM];
} HPETState;
diff -r 5d09e6098f93 -r 6db6b5df4f6f xen/include/public/hvm/save.h
--- a/xen/include/public/hvm/save.h Wed Jan 31 17:22:17 2007 +0000
+++ b/xen/include/public/hvm/save.h Wed Jan 31 18:15:00 2007 +0000
@@ -381,10 +381,40 @@ DECLARE_HVM_SAVE_TYPE(RTC, 9, struct hvm
DECLARE_HVM_SAVE_TYPE(RTC, 9, struct hvm_hw_rtc);
+/*
+ * HPET
+ */
+
+#define HPET_TIMER_NUM 3 /* 3 timers supported now */
+struct hvm_hw_hpet {
+ /* Memory-mapped, software visible registers */
+ uint64_t capability; /* capabilities */
+ uint64_t res0; /* reserved */
+ uint64_t config; /* configuration */
+ uint64_t res1; /* reserved */
+ uint64_t isr; /* interrupt status reg */
+ uint64_t res2[25]; /* reserved */
+ uint64_t mc64; /* main counter */
+ uint64_t res3; /* reserved */
+ struct { /* timers */
+ uint64_t config; /* configuration/cap */
+ uint64_t cmp; /* comparator */
+ uint64_t fsb; /* FSB route, not supported now */
+ uint64_t res4; /* reserved */
+ } timers[HPET_TIMER_NUM];
+ uint64_t res5[4*(24-HPET_TIMER_NUM)]; /* reserved, up to 0x3ff */
+
+ /* Hidden register state */
+ uint64_t period[HPET_TIMER_NUM]; /* Last value written to comparator */
+};
+
+DECLARE_HVM_SAVE_TYPE(HPET, 10, struct hvm_hw_hpet);
+
+
/*
* Largest type-code in use
*/
-#define HVM_SAVE_CODE_MAX 9
+#define HVM_SAVE_CODE_MAX 10
/*
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