Subject: [PATCH v1 2/2] KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM

From: Bharata B Rao <[email-masked]>
Date: Mon, 19 Oct 2020 16:56:42 +0530

In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.

Signed-off-by: Bharata B Rao <[email-masked]>
---
 arch/powerpc/kvm/book3s_64_mmu_radix.c | 26 +++++++++++++++++++++-----
 arch/powerpc/kvm/book3s_hv_nested.c    | 13 +++++++++++--
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index 22a677b18695e..9934a91adcc3b 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -21,6 +21,7 @@
 #include <asm/pte-walk.h>
 #include <asm/ultravisor.h>
 #include <asm/kvm_book3s_uvmem.h>
+#include <asm/plpar_wrappers.h>
 
 /*
  * Supported radix tree geometry.
@@ -318,9 +319,17 @@ void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr,
 	}
 
 	psi = shift_to_mmu_psize(pshift);
-	rb = addr | (mmu_get_ap(psi) << PPC_BITLSHIFT(58));
-	rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(0, 0, 1),
-				lpid, rb);
+	if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE)) {
+		rb = addr | (mmu_get_ap(psi) << PPC_BITLSHIFT(58));
+		rc = plpar_hcall_norets(H_TLB_INVALIDATE,
+					H_TLBIE_P1_ENC(0, 0, 1), lpid, rb);
+	} else {
+		rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+					    H_RPTI_TYPE_NESTED |
+					    H_RPTI_TYPE_TLB,
+					    psize_to_rpti_pgsize(psi),
+					    addr, addr + psize);
+	}
 	if (rc)
 		pr_err("KVM: TLB page invalidation hcall failed, rc=%ld\n", rc);
 }
@@ -334,8 +343,15 @@ static void kvmppc_radix_flush_pwc(struct kvm *kvm, unsigned int lpid)
 		return;
 	}
 
-	rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(1, 0, 1),
-				lpid, TLBIEL_INVAL_SET_LPID);
+	if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE))
+		rc = plpar_hcall_norets(H_TLB_INVALIDATE,
+					H_TLBIE_P1_ENC(1, 0, 1),
+					lpid, TLBIEL_INVAL_SET_LPID);
+	else
+		rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+					    H_RPTI_TYPE_NESTED |
+					    H_RPTI_TYPE_PWC, H_RPTI_PAGE_ALL,
+					    0, -1UL);
 	if (rc)
 		pr_err("KVM: TLB PWC invalidation hcall failed, rc=%ld\n", rc);
 }
diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c
index 3ec0231628b42..2a187c782e89b 100644
--- a/arch/powerpc/kvm/book3s_hv_nested.c
+++ b/arch/powerpc/kvm/book3s_hv_nested.c
@@ -19,6 +19,7 @@
 #include <asm/pgalloc.h>
 #include <asm/pte-walk.h>
 #include <asm/reg.h>
+#include <asm/plpar_wrappers.h>
 
 static struct patb_entry *pseries_partition_tb;
 
@@ -402,8 +403,16 @@ static void kvmhv_flush_lpid(unsigned int lpid)
 		return;
 	}
 
-	rc = plpar_hcall_norets(H_TLB_INVALIDATE, H_TLBIE_P1_ENC(2, 0, 1),
-				lpid, TLBIEL_INVAL_SET_LPID);
+	if (!firmware_has_feature(FW_FEATURE_RPT_INVALIDATE))
+		rc = plpar_hcall_norets(H_TLB_INVALIDATE,
+					H_TLBIE_P1_ENC(2, 0, 1),
+					lpid, TLBIEL_INVAL_SET_LPID);
+	else
+		rc = pseries_rpt_invalidate(lpid, H_RPTI_TARGET_CMMU,
+					    H_RPTI_TYPE_NESTED |
+					    H_RPTI_TYPE_TLB | H_RPTI_TYPE_PWC |
+					    H_RPTI_TYPE_PAT,
+					    H_RPTI_PAGE_ALL, 0, -1UL);
 	if (rc)
 		pr_err("KVM: TLB LPID invalidation hcall failed, rc=%ld\n", rc);
 }
-- 
2.26.2