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author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-16 11:06:22 -0800 |
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committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-16 11:06:22 -0800 |
commit | 20b4755e4fbb226eb42951bd40b53fcbce9ef944 (patch) | |
tree | 43da70e0b32ee423d3643ecd422821383411ab72 /arch/powerpc/kvm/book3s_64_mmu.c | |
parent | xen: fix header export to userspace (diff) | |
parent | Linux 2.6.37-rc2 (diff) | |
download | linux-dev-20b4755e4fbb226eb42951bd40b53fcbce9ef944.tar.xz linux-dev-20b4755e4fbb226eb42951bd40b53fcbce9ef944.zip |
Merge commit 'v2.6.37-rc2' into upstream/xenfs
* commit 'v2.6.37-rc2': (10093 commits)
Linux 2.6.37-rc2
capabilities/syslog: open code cap_syslog logic to fix build failure
i2c: Sanity checks on adapter registration
i2c: Mark i2c_adapter.id as deprecated
i2c: Drivers shouldn't include <linux/i2c-id.h>
i2c: Delete unused adapter IDs
i2c: Remove obsolete cleanup for clientdata
include/linux/kernel.h: Move logging bits to include/linux/printk.h
Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again)
hwmon: (w83795) Check for BEEP pin availability
hwmon: (w83795) Clear intrusion alarm immediately
hwmon: (w83795) Read the intrusion state properly
hwmon: (w83795) Print the actual temperature channels as sources
hwmon: (w83795) List all usable temperature sources
hwmon: (w83795) Expose fan control method
hwmon: (w83795) Fix fan control mode attributes
hwmon: (lm95241) Check validity of input values
hwmon: Change mail address of Hans J. Koch
PCI: sysfs: fix printk warnings
GFS2: Fix inode deallocation race
...
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu.c')
-rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu.c | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c index 4025ea26b3c1..d7889ef3211e 100644 --- a/arch/powerpc/kvm/book3s_64_mmu.c +++ b/arch/powerpc/kvm/book3s_64_mmu.c @@ -163,6 +163,22 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, bool found = false; bool perm_err = false; int second = 0; + ulong mp_ea = vcpu->arch.magic_page_ea; + + /* Magic page override */ + if (unlikely(mp_ea) && + unlikely((eaddr & ~0xfffULL) == (mp_ea & ~0xfffULL)) && + !(vcpu->arch.shared->msr & MSR_PR)) { + gpte->eaddr = eaddr; + gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, eaddr, data); + gpte->raddr = vcpu->arch.magic_page_pa | (gpte->raddr & 0xfff); + gpte->raddr &= KVM_PAM; + gpte->may_execute = true; + gpte->may_read = true; + gpte->may_write = true; + + return 0; + } slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, eaddr); if (!slbe) @@ -180,9 +196,9 @@ do_second: goto no_page_found; } - if ((vcpu->arch.msr & MSR_PR) && slbe->Kp) + if ((vcpu->arch.shared->msr & MSR_PR) && slbe->Kp) key = 4; - else if (!(vcpu->arch.msr & MSR_PR) && slbe->Ks) + else if (!(vcpu->arch.shared->msr & MSR_PR) && slbe->Ks) key = 4; for (i=0; i<16; i+=2) { @@ -381,7 +397,7 @@ static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu) for (i = 1; i < vcpu_book3s->slb_nr; i++) vcpu_book3s->slb[i].valid = false; - if (vcpu->arch.msr & MSR_IR) { + if (vcpu->arch.shared->msr & MSR_IR) { kvmppc_mmu_flush_segments(vcpu); kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)); } @@ -445,14 +461,15 @@ static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid, ulong ea = esid << SID_SHIFT; struct kvmppc_slb *slb; u64 gvsid = esid; + ulong mp_ea = vcpu->arch.magic_page_ea; - if (vcpu->arch.msr & (MSR_DR|MSR_IR)) { + if (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) { slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), ea); if (slb) gvsid = slb->vsid; } - switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) { + switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) { case 0: *vsid = VSID_REAL | esid; break; @@ -464,7 +481,7 @@ static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid, break; case MSR_DR|MSR_IR: if (!slb) - return -ENOENT; + goto no_slb; *vsid = gvsid; break; @@ -473,10 +490,21 @@ static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid, break; } - if (vcpu->arch.msr & MSR_PR) + if (vcpu->arch.shared->msr & MSR_PR) *vsid |= VSID_PR; return 0; + +no_slb: + /* Catch magic page case */ + if (unlikely(mp_ea) && + unlikely(esid == (mp_ea >> SID_SHIFT)) && + !(vcpu->arch.shared->msr & MSR_PR)) { + *vsid = VSID_REAL | esid; + return 0; + } + + return -EINVAL; } static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu) |