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KVM: ia64: Map in SN2 RTC registers to the VMM module

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On SN2, map in the SN2 RTC registers to the VMM module, needed for ITC
emulation.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jes Sorensen 2009-02-25 10:38:52 -06:00 committed by Avi Kivity
parent 58c2dde17d
commit 0c72ea7fb8
3 changed files with 42 additions and 5 deletions
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2
arch/ia64/include/asm/kvm_host.h
View File

@ -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;

2
arch/ia64/include/asm/pgtable.h
View File

@ -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__

43
arch/ia64/kvm/kvm-ia64.c
View File

@ -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;