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[Qemu-devel] [RFC PATCH v2 07/49] kvmapic: fixing loading vmstate
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [RFC PATCH v2 07/49] kvmapic: fixing loading vmstate |
Date: |
Thu, 17 Jul 2014 15:02:39 +0400 |
User-agent: |
StGit/0.16 |
vapic state should not be synchronized with APIC while loading,
because APIC state could be not loaded yet at that moment.
We just save vapic_paddr in APIC VMState instead of synchronization.
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
hw/i386/kvmvapic.c | 22 +++++++++++++++++++++-
hw/intc/apic_common.c | 5 ++++-
2 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index cb855c7..417ab6a 100644
--- a/hw/i386/kvmvapic.c
+++ b/hw/i386/kvmvapic.c
@@ -351,6 +351,24 @@ static int get_kpcr_number(X86CPU *cpu)
return kpcr.number;
}
+static int vapic_enable_post_load(VAPICROMState *s, X86CPU *cpu)
+{
+ int cpu_number = get_kpcr_number(cpu);
+ hwaddr vapic_paddr;
+ static const uint8_t enabled = 1;
+
+ if (cpu_number < 0) {
+ return -1;
+ }
+ vapic_paddr = s->vapic_paddr +
+ (((hwaddr)cpu_number) << VAPIC_CPU_SHIFT);
+ cpu_physical_memory_rw(vapic_paddr + offsetof(VAPICState, enabled),
+ (void *)&enabled, sizeof(enabled), 1);
+ s->state = VAPIC_ACTIVE;
+
+ return 0;
+}
+
static int vapic_enable(VAPICROMState *s, X86CPU *cpu)
{
int cpu_number = get_kpcr_number(cpu);
@@ -731,7 +749,9 @@ static void do_vapic_enable(void *data)
VAPICROMState *s = data;
X86CPU *cpu = X86_CPU(first_cpu);
- vapic_enable(s, cpu);
+ /* Do not synchronize with APIC, because it was not loaded yet.
+ Just call the enable function which does not have synchronization. */
+ vapic_enable_post_load(s, cpu);
}
static int vapic_post_load(void *opaque, int version_id)
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index ce3d903..9d75ee0 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -347,7 +347,7 @@ static int apic_dispatch_post_load(void *opaque, int
version_id)
static const VMStateDescription vmstate_apic_common = {
.name = "apic",
- .version_id = 3,
+ .version_id = 4,
.minimum_version_id = 3,
.minimum_version_id_old = 1,
.load_state_old = apic_load_old,
@@ -374,6 +374,9 @@ static const VMStateDescription vmstate_apic_common = {
VMSTATE_INT64(next_time, APICCommonState),
VMSTATE_INT64(timer_expiry,
APICCommonState), /* open-coded timer state */
+ VMSTATE_INT32_V(sipi_vector, APICCommonState, 4),
+ VMSTATE_INT32_V(wait_for_sipi, APICCommonState, 4),
+ VMSTATE_UINT64_V(vapic_paddr, APICCommonState, 4),
VMSTATE_END_OF_LIST()
}
};
- [Qemu-devel] [RFC PATCH v2 00/49] Series short description, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 01/49] acpi: accurate overflow check, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 02/49] integratorcp: adding vmstate for save/restore, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 04/49] fdc: adding vmstate for save/restore, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 03/49] pcspk: adding vmstate for save/restore, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 05/49] parallel: adding vmstate for save/restore, Pavel Dovgalyuk, 2014/07/17
- [Qemu-devel] [RFC PATCH v2 07/49] kvmapic: fixing loading vmstate,
Pavel Dovgalyuk <=
- [Qemu-devel] [RFC PATCH v2 06/49] serial: fixing vmstate for save/restore, Pavel Dovgalyuk, 2014/07/17
[Qemu-devel] [RFC PATCH v2 08/49] hpet: fixing saving and loading process, Pavel Dovgalyuk, 2014/07/17
[Qemu-devel] [RFC PATCH v2 10/49] rtl8139: adding new fields to vmstate, Pavel Dovgalyuk, 2014/07/17