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| author | Simon Guo <wei.guo.simon@gmail.com> | 2018-05-23 09:01:57 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-06-01 02:29:51 +0200 |
| commit | 66c33e796cf9d5f7150bf4c701786d0527b594b6 (patch) | |
| tree | cfdf6a7bfe08ce131b399b6cc610296564eca012 /arch/powerpc/kvm/book3s_pr.c | |
| parent | KVM: PPC: Book3S PR: Add new kvmppc_copyto/from_vcpu_tm APIs (diff) | |
| download | linux-66c33e796cf9d5f7150bf4c701786d0527b594b6.tar.xz linux-66c33e796cf9d5f7150bf4c701786d0527b594b6.zip | |
KVM: PPC: Book3S PR: Add kvmppc_save/restore_tm_sprs() APIs
This patch adds 2 new APIs, kvmppc_save_tm_sprs() and
kvmppc_restore_tm_sprs(), for the purpose of TEXASR/TFIAR/TFHAR
save/restore.
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 9369cd321417..92e467ebadf0 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -42,6 +42,7 @@ #include <linux/highmem.h> #include <linux/module.h> #include <linux/miscdevice.h> +#include <asm/asm-prototypes.h> #include "book3s.h" @@ -284,6 +285,27 @@ out: svcpu_put(svcpu); } +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM +static inline void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu) +{ + tm_enable(); + vcpu->arch.tfhar = mfspr(SPRN_TFHAR); + vcpu->arch.texasr = mfspr(SPRN_TEXASR); + vcpu->arch.tfiar = mfspr(SPRN_TFIAR); + tm_disable(); +} + +static inline void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu) +{ + tm_enable(); + mtspr(SPRN_TFHAR, vcpu->arch.tfhar); + mtspr(SPRN_TEXASR, vcpu->arch.texasr); + mtspr(SPRN_TFIAR, vcpu->arch.tfiar); + tm_disable(); +} + +#endif + static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu) { int r = 1; /* Indicate we want to get back into the guest */ |