From: Jes Sorensen <jes@xxxxxxx>
On SN2, map in the SN2 RTC registers to the VMM module, needed for ITC
emulation.
Signed-off-by: Jes Sorensen <jes@xxxxxxx>
Acked-by: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/ia64/include/asm/kvm_host.h | 2 +
arch/ia64/include/asm/pgtable.h | 2 +
arch/ia64/kvm/kvm-ia64.c | 43 +++++++++++++++++++++++++++++++++----
3 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h
index 5608488..1243995 100644
--- a/arch/ia64/include/asm/kvm_host.h
+++ b/arch/ia64/include/asm/kvm_host.h
@@ -371,6 +371,7 @@ struct kvm_vcpu_arch {
int last_run_cpu;
int vmm_tr_slot;
int vm_tr_slot;
+ int sn_rtc_tr_slot;
#define KVM_MP_STATE_RUNNABLE 0
#define KVM_MP_STATE_UNINITIALIZED 1
@@ -465,6 +466,7 @@ struct kvm_arch {
unsigned long vmm_init_rr;
int online_vcpus;
+ int is_sn2;
struct kvm_ioapic *vioapic;
struct kvm_vm_stat stat;
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 7a9bff4..0a9cc73 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -146,6 +146,8 @@
#define PAGE_GATE __pgprot(__ACCESS_BITS | _PAGE_PL_0 | _PAGE_AR_X_RX)
#define PAGE_KERNEL __pgprot(__DIRTY_BITS | _PAGE_PL_0 | _PAGE_AR_RWX)
#define PAGE_KERNELRX __pgprot(__ACCESS_BITS | _PAGE_PL_0 | _PAGE_AR_RX)
+#define PAGE_KERNEL_UC __pgprot(__DIRTY_BITS | _PAGE_PL_0 | _PAGE_AR_RWX | \
+ _PAGE_MA_UC)
# ifndef __ASSEMBLY__
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index acf43ec..14a3fab 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -41,6 +41,9 @@
#include <asm/div64.h>
#include <asm/tlb.h>
#include <asm/elf.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/shub_mmr.h>
#include "misc.h"
#include "vti.h"
@@ -119,8 +122,7 @@ void kvm_arch_hardware_enable(void *garbage)
unsigned long saved_psr;
int slot;
- pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
- PAGE_KERNEL));
+ pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
local_irq_save(saved_psr);
slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
local_irq_restore(saved_psr);
@@ -425,6 +427,23 @@ static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return 1;
}
+static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
+{
+ unsigned long pte, rtc_phys_addr, map_addr;
+ int slot;
+
+ map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
+ rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
+ pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
+ slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
+ vcpu->arch.sn_rtc_tr_slot = slot;
+ if (slot < 0) {
+ printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
+ slot = 0;
+ }
+ return slot;
+}
+
int kvm_emulate_halt(struct kvm_vcpu *vcpu)
{
@@ -563,18 +582,29 @@ static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
if (r < 0)
goto out;
vcpu->arch.vm_tr_slot = r;
+
+#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
+ if (kvm->arch.is_sn2) {
+ r = kvm_sn2_setup_mappings(vcpu);
+ if (r < 0)
+ goto out;
+ }
+#endif
+
r = 0;
out:
return r;
-
}
static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
{
-
+ struct kvm *kvm = vcpu->kvm;
ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
-
+#if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
+ if (kvm->arch.is_sn2)
+ ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
+#endif
}
static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
@@ -800,6 +830,9 @@ struct kvm *kvm_arch_create_vm(void)
if (IS_ERR(kvm))
return ERR_PTR(-ENOMEM);
+
+ kvm->arch.is_sn2 = ia64_platform_is("sn2");
+
kvm_init_vm(kvm);
kvm->arch.online_vcpus = 0;
--
1.6.0.6
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