[PATCH v2 14/30] KVM: PPC: Book3S PR: add kvmppc_save/restore_tm_sprs() APIs
From: <hidden>
Date: 2018-02-27 18:01:16
Also in:
kvm
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: Simon Guo <redacted> This patch adds 2 new APIs kvmppc_save_tm_sprs()/kvmppc_restore_tm_sprs() for the purpose of TEXASR/TFIAR/TFHAR save/restore. Signed-off-by: Simon Guo <redacted> Reviewed-by: Paul Mackerras <redacted> --- arch/powerpc/kvm/book3s_pr.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 4bf76c9..91d0e59 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"
@@ -286,6 +287,27 @@ void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu, preempt_enable(); } +#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 */
--
1.8.3.1