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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>
This commit is contained in:
Simon Guo 2018-05-23 15:01:57 +08:00 committed by Paul Mackerras
parent de7ad93219
commit 66c33e796c
1 changed files with 22 additions and 0 deletions
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22
arch/powerpc/kvm/book3s_pr.c
View File

@ -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 */