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| author | Alexander Graf <agraf@suse.de> | 2010-01-08 02:58:06 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:35:49 -0300 |
| commit | 021ec9c69f8b7b20f46296cc76cc4cb341b25191 (patch) | |
| tree | 304f086761e7c01fb412c8319b89ff8b6fb2dde7 /arch/powerpc/include/asm | |
| parent | bc90923e27908ef65aa8aaad2f234e18b5273c78 (diff) | |
| download | linux-021ec9c69f8b7b20f46296cc76cc4cb341b25191.tar.gz linux-021ec9c69f8b7b20f46296cc76cc4cb341b25191.tar.bz2 linux-021ec9c69f8b7b20f46296cc76cc4cb341b25191.zip | |
KVM: PPC: Call SLB patching code in interrupt safe manner
Currently we're racy when doing the transition from IR=1 to IR=0, from
the module memory entry code to the real mode SLB switching code.
To work around that I took a look at the RTAS entry code which is faced
with a similar problem and did the same thing:
A small helper in linear mapped memory that does mtmsr with IR=0 and
then RFIs info the actual handler.
Thanks to that trick we can safely take page faults in the entry code
and only need to be really wary of what to do as of the SLB switching
part.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64_asm.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 |
3 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index f192017d799d..c91be0ff0232 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -121,6 +121,7 @@ extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, extern u32 kvmppc_trampoline_lowmem; extern u32 kvmppc_trampoline_enter; +extern void kvmppc_rmcall(ulong srr0, ulong srr1); static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu) { diff --git a/arch/powerpc/include/asm/kvm_book3s_64_asm.h b/arch/powerpc/include/asm/kvm_book3s_64_asm.h index fca9404c1a7d..183461b48407 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64_asm.h +++ b/arch/powerpc/include/asm/kvm_book3s_64_asm.h @@ -69,7 +69,6 @@ struct kvmppc_book3s_shadow_vcpu { ulong scratch0; ulong scratch1; ulong vmhandler; - ulong rmhandler; }; #endif /*__ASSEMBLY__ */ diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index d615fa8a1412..f7215e622dfd 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -167,6 +167,7 @@ struct kvm_vcpu_arch { ulong trampoline_lowmem; ulong trampoline_enter; ulong highmem_handler; + ulong rmcall; ulong host_paca_phys; struct kvmppc_mmu mmu; #endif |