[PATCH v2 02/10] KVM: PPC: Book3S HV: Save/restore new PMU registers
From: Athira Rajeev <hidden>
Date: 2020-07-01 09:54:19
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
PowerISA v3.1 has added new performance monitoring unit (PMU) special purpose registers (SPRs). They are Monitor Mode Control Register 3 (MMCR3) Sampled Instruction Event Register A (SIER2) Sampled Instruction Event Register B (SIER3) Patch addes support to save/restore these new SPRs while entering/exiting guest. Signed-off-by: Athira Rajeev <redacted> --- arch/powerpc/include/asm/kvm_book3s_asm.h | 2 +- arch/powerpc/include/asm/kvm_host.h | 4 ++-- arch/powerpc/kernel/asm-offsets.c | 3 +++ arch/powerpc/kvm/book3s_hv.c | 6 ++++-- arch/powerpc/kvm/book3s_hv_interrupts.S | 8 ++++++++ arch/powerpc/kvm/book3s_hv_rmhandlers.S | 24 ++++++++++++++++++++++++ 6 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h
index 45704f2..078f464 100644
--- a/arch/powerpc/include/asm/kvm_book3s_asm.h
+++ b/arch/powerpc/include/asm/kvm_book3s_asm.h@@ -119,7 +119,7 @@ struct kvmppc_host_state { void __iomem *xive_tima_virt; u32 saved_xirr; u64 dabr; - u64 host_mmcr[7]; /* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER */ + u64 host_mmcr[10]; /* MMCR 0,1,A, SIAR, SDAR, MMCR2, SIER, MMCR3, SIER2/3 */ u32 host_pmc[8]; u64 host_purr; u64 host_spurr;
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 7e2d061..d718061 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h@@ -637,12 +637,12 @@ struct kvm_vcpu_arch { u32 ccr1; u32 dbsr; - u64 mmcr[5]; + u64 mmcr[6]; u32 pmc[8]; u32 spmc[2]; u64 siar; u64 sdar; - u64 sier; + u64 sier[3]; #ifdef CONFIG_PPC_TRANSACTIONAL_MEM u64 tfhar; u64 texasr;
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 6657dc6..20a8b1e 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c@@ -696,6 +696,9 @@ int main(void) HSTATE_FIELD(HSTATE_SDAR, host_mmcr[4]); HSTATE_FIELD(HSTATE_MMCR2, host_mmcr[5]); HSTATE_FIELD(HSTATE_SIER, host_mmcr[6]); + HSTATE_FIELD(HSTATE_MMCR3, host_mmcr[7]); + HSTATE_FIELD(HSTATE_SIER2, host_mmcr[8]); + HSTATE_FIELD(HSTATE_SIER3, host_mmcr[9]); HSTATE_FIELD(HSTATE_PMC1, host_pmc[0]); HSTATE_FIELD(HSTATE_PMC2, host_pmc[1]); HSTATE_FIELD(HSTATE_PMC3, host_pmc[2]);
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 6bf66649..c265800 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c@@ -1698,7 +1698,8 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, *val = get_reg_val(id, vcpu->arch.sdar); break; case KVM_REG_PPC_SIER: - *val = get_reg_val(id, vcpu->arch.sier); + i = id - KVM_REG_PPC_SIER; + *val = get_reg_val(id, vcpu->arch.sier[i]); break; case KVM_REG_PPC_IAMR: *val = get_reg_val(id, vcpu->arch.iamr);
@@ -1919,7 +1920,8 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, vcpu->arch.sdar = set_reg_val(id, *val); break; case KVM_REG_PPC_SIER: - vcpu->arch.sier = set_reg_val(id, *val); + i = id - KVM_REG_PPC_SIER; + vcpu->arch.sier[i] = set_reg_val(id, *val); break; case KVM_REG_PPC_IAMR: vcpu->arch.iamr = set_reg_val(id, *val);
diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S
index 63fd81f..59822cb 100644
--- a/arch/powerpc/kvm/book3s_hv_interrupts.S
+++ b/arch/powerpc/kvm/book3s_hv_interrupts.S@@ -140,6 +140,14 @@ BEGIN_FTR_SECTION std r8, HSTATE_MMCR2(r13) std r9, HSTATE_SIER(r13) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) +BEGIN_FTR_SECTION + mfspr r5, SPRN_MMCR3 + mfspr r6, SPRN_SIER2 + mfspr r7, SPRN_SIER3 + std r5, HSTATE_MMCR3(r13) + std r6, HSTATE_SIER2(r13) + std r7, HSTATE_SIER3(r13) +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31) mfspr r3, SPRN_PMC1 mfspr r5, SPRN_PMC2 mfspr r6, SPRN_PMC3
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 7194389..57b6c14 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S@@ -3436,6 +3436,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG) mtspr SPRN_SIAR, r7 mtspr SPRN_SDAR, r8 BEGIN_FTR_SECTION + ld r5, VCPU_MMCR + 40(r4) + ld r6, VCPU_SIER + 8(r4) + ld r7, VCPU_SIER + 16(r4) + mtspr SPRN_MMCR3, r5 + mtspr SPRN_SIER2, r6 + mtspr SPRN_SIER3, r7 +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31) +BEGIN_FTR_SECTION ld r5, VCPU_MMCR + 24(r4) ld r6, VCPU_SIER(r4) mtspr SPRN_MMCR2, r5
@@ -3496,6 +3504,14 @@ BEGIN_FTR_SECTION mtspr SPRN_MMCR2, r8 mtspr SPRN_SIER, r9 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) +BEGIN_FTR_SECTION + ld r5, HSTATE_MMCR3(r13) + ld r6, HSTATE_SIER2(r13) + ld r7, HSTATE_SIER3(r13) + mtspr SPRN_MMCR3, r5 + mtspr SPRN_SIER2, r6 + mtspr SPRN_SIER3, r7 +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31) mtspr SPRN_MMCR0, r3 isync mtlr r0
@@ -3555,6 +3571,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) BEGIN_FTR_SECTION std r10, VCPU_MMCR + 24(r9) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) +BEGIN_FTR_SECTION + mfspr r5, SPRN_MMCR3 + mfspr r6, SPRN_SIER2 + mfspr r7, SPRN_SIER3 + std r5, VCPU_MMCR + 40(r9) + std r6, VCPU_SIER + 8(r9) + std r7, VCPU_SIER + 16(r9) +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31) std r7, VCPU_SIAR(r9) std r8, VCPU_SDAR(r9) mfspr r3, SPRN_PMC1
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1.8.3.1