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KVM: PPC: Interpret SR registers on demand

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Right now we're examining the contents of Book3s_32's segment registers when
the register is written and put the interpreted contents into a struct.

There are two reasons this is bad. For starters, the struct has worse real-time
performance, as it occupies more ram. But the more important part is that with
segment registers being interpreted from their raw values, we can put them in
the shared page, allowing guests to mess with them directly.

This patch makes the internal representation of SRs be u32s.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf
2010-08-03 01:06:11 +02:00
committed by Avi Kivity
parent c1c88e2fa1
commit 8e8651783f
3 changed files with 46 additions and 48 deletions
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11
arch/powerpc/include/asm/kvm_book3s.h
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@@ -38,15 +38,6 @@ struct kvmppc_slb {
bool class : 1;
};
struct kvmppc_sr {
u32 raw;
u32 vsid;
bool Ks : 1;
bool Kp : 1;
bool nx : 1;
bool valid : 1;
};
struct kvmppc_bat {
u64 raw;
u32 bepi;
@@ -79,7 +70,7 @@ struct kvmppc_vcpu_book3s {
u64 vsid;
} slb_shadow[64];
u8 slb_shadow_max;
struct kvmppc_sr sr[16];
u32 sr[16];
struct kvmppc_bat ibat[8];
struct kvmppc_bat dbat[8];
u64 hid[6];