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| author | Bharat Bhushan <Bharat.Bhushan@freescale.com> | 2014-07-21 11:23:26 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-07-28 15:23:14 +0200 |
| commit | 99e99d19a86dc596703ed79dcecf9ca6b32a6a8a (patch) | |
| tree | 9b7f2622633ad9f922a569b3403d18b83f7ede6f /arch | |
| parent | f5250471b2d6ad27d536cb34ce39d76b91b2b36b (diff) | |
| download | linux-99e99d19a86dc596703ed79dcecf9ca6b32a6a8a.tar.gz linux-99e99d19a86dc596703ed79dcecf9ca6b32a6a8a.tar.bz2 linux-99e99d19a86dc596703ed79dcecf9ca6b32a6a8a.zip | |
kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry exit
SPRN_SPRG is used by debug interrupt handler, so this is required for
debug support.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/kvm/bookehv_interrupts.S | 4 |
3 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 855ba4d9539d..562f685d1678 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -587,6 +587,7 @@ struct kvm_vcpu_arch { u32 mmucfg; u32 eptcfg; u32 epr; + u64 sprg9; u32 pwrmgtcr0; u32 crit_save; /* guest debug registers*/ diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 17ffcb4f27f9..ab9ae0411e8f 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -668,6 +668,7 @@ int main(void) DEFINE(VCPU_LR, offsetof(struct kvm_vcpu, arch.lr)); DEFINE(VCPU_CTR, offsetof(struct kvm_vcpu, arch.ctr)); DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.pc)); + DEFINE(VCPU_SPRG9, offsetof(struct kvm_vcpu, arch.sprg9)); DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst)); DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear)); DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr)); diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index e000b397ece3..b4f8fbafee7a 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -398,6 +398,7 @@ _GLOBAL(kvmppc_resume_host) #ifdef CONFIG_64BIT PPC_LL r3, PACA_SPRG_VDSO(r13) #endif + mfspr r5, SPRN_SPRG9 PPC_STD(r6, VCPU_SHARED_SPRG4, r11) mfspr r8, SPRN_SPRG6 PPC_STD(r7, VCPU_SHARED_SPRG5, r11) @@ -405,6 +406,7 @@ _GLOBAL(kvmppc_resume_host) #ifdef CONFIG_64BIT mtspr SPRN_SPRG_VDSO_WRITE, r3 #endif + PPC_STD(r5, VCPU_SPRG9, r4) PPC_STD(r8, VCPU_SHARED_SPRG6, r11) mfxer r3 PPC_STD(r9, VCPU_SHARED_SPRG7, r11) @@ -639,7 +641,9 @@ lightweight_exit: mtspr SPRN_SPRG5W, r6 PPC_LD(r8, VCPU_SHARED_SPRG7, r11) mtspr SPRN_SPRG6W, r7 + PPC_LD(r5, VCPU_SPRG9, r4) mtspr SPRN_SPRG7W, r8 + mtspr SPRN_SPRG9, r5 /* Load some guest volatiles. */ PPC_LL r3, VCPU_LR(r4) |