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KVM: PPC: Put segment registers in shared page

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Now that the actual mtsr doesn't do anything anymore, we can move the sr
contents over to the shared page, so a guest can directly read and write
its sr contents from guest context.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2010-08-03 02:29:27 +02:00 committed by Avi Kivity
parent 8e8651783f
commit df1bfa25d8
5 changed files with 11 additions and 12 deletions
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1
arch/powerpc/include/asm/kvm_book3s.h
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@ -70,7 +70,6 @@ struct kvmppc_vcpu_book3s {
u64 vsid;
} slb_shadow[64];
u8 slb_shadow_max;
u32 sr[16];
struct kvmppc_bat ibat[8];
struct kvmppc_bat dbat[8];
u64 hid[6];

1
arch/powerpc/include/asm/kvm_para.h
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@ -38,6 +38,7 @@ struct kvm_vcpu_arch_shared {
__u64 msr;
__u32 dsisr;
__u32 int_pending; /* Tells the guest if we have an interrupt */
__u32 sr[16];
};
#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */

7
arch/powerpc/kvm/book3s.c
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@ -1161,10 +1161,9 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
}
} else {
for (i = 0; i < 16; i++) {
sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i];
sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i];
}
for (i = 0; i < 16; i++)
sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
for (i = 0; i < 8; i++) {
sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;

12
arch/powerpc/kvm/book3s_32_mmu.c
View File

@ -88,9 +88,9 @@ static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
u64 *vsid);
static u32 find_sr(struct kvmppc_vcpu_book3s *vcpu_book3s, gva_t eaddr)
static u32 find_sr(struct kvm_vcpu *vcpu, gva_t eaddr)
{
return vcpu_book3s->sr[(eaddr >> 28) & 0xf];
return vcpu->arch.shared->sr[(eaddr >> 28) & 0xf];
}
static u64 kvmppc_mmu_book3s_32_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
@ -211,7 +211,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
int i;
int found = 0;
sre = find_sr(vcpu_book3s, eaddr);
sre = find_sr(vcpu, eaddr);
dprintk_pte("SR 0x%lx: vsid=0x%x, raw=0x%x\n", eaddr >> 28,
sr_vsid(sre), sre);
@ -335,13 +335,13 @@ static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
static u32 kvmppc_mmu_book3s_32_mfsrin(struct kvm_vcpu *vcpu, u32 srnum)
{
return to_book3s(vcpu)->sr[srnum];
return vcpu->arch.shared->sr[srnum];
}
static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
ulong value)
{
to_book3s(vcpu)->sr[srnum] = value;
vcpu->arch.shared->sr[srnum] = value;
kvmppc_mmu_map_segment(vcpu, srnum << SID_SHIFT);
}
@ -358,7 +358,7 @@ static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
u64 gvsid = esid;
if (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
sr = find_sr(to_book3s(vcpu), ea);
sr = find_sr(vcpu, ea);
if (sr_valid(sr))
gvsid = sr_vsid(sr);
}

2
arch/powerpc/kvm/powerpc.c
View File

@ -66,7 +66,7 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
vcpu->arch.magic_page_pa = param1;
vcpu->arch.magic_page_ea = param2;
r2 = 0;
r2 = KVM_MAGIC_FEAT_SR;
r = HC_EV_SUCCESS;
break;