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KVM: powerpc: Fix mtsrin in book3s_64 mmu 

We were shifting the Ks/Kp/N bits one bit too far on mtsrin. It took
me some time to figure that out, so I also put in some debugging and a
comment explaining the conversion.

This fixes current OpenBIOS boot on PPC64 KVM.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2009-12-19 18:07:39 +01:00 committed by Marcelo Tosatti
parent a662b8135a
commit 5279aeb4b9
1 changed files with 21 additions and 1 deletions
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22
arch/powerpc/kvm/book3s_64_mmu.c
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@ -390,6 +390,26 @@ static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
{
u64 rb = 0, rs = 0;
/*
* According to Book3 2.01 mtsrin is implemented as:
*
* The SLB entry specified by (RB)32:35 is loaded from register
* RS, as follows.
*
* SLBE Bit Source SLB Field
*
* 0:31 0x0000_0000 ESID-0:31
* 32:35 (RB)32:35 ESID-32:35
* 36 0b1 V
* 37:61 0x00_0000|| 0b0 VSID-0:24
* 62:88 (RS)37:63 VSID-25:51
* 89:91 (RS)33:35 Ks Kp N
* 92 (RS)36 L ((RS)36 must be 0b0)
* 93 0b0 C
*/
dprintk("KVM MMU: mtsrin(0x%x, 0x%lx)\n", srnum, value);
/* ESID = srnum */
rb |= (srnum & 0xf) << 28;
/* Set the valid bit */
@ -400,7 +420,7 @@ static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
/* VSID = VSID */
rs |= (value & 0xfffffff) << 12;
/* flags = flags */
rs |= ((value >> 27) & 0xf) << 9;
rs |= ((value >> 28) & 0x7) << 9;
kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
}