linux-kernel - [PATCH] powerpc: Add PVN support for HeXin C2000 processor

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Message-Id: <20231117075215.647-1-ke.zhao@shingroup.cn>
Date:   Fri, 17 Nov 2023 15:52:15 +0800
From:   Zhao Ke <ke.zhao@...ngroup.cn>
To:     mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
        fbarrat@...ux.ibm.com, ajd@...ux.ibm.com, arnd@...db.de,
        gregkh@...uxfoundation.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Zhao Ke <ke.zhao@...ngroup.cn>
Subject: [PATCH] powerpc: Add PVN support for HeXin C2000 processor

HeXin Tech Co. has applied for a new PVN from the OpenPower Community
for its new processor C2000. The OpenPower has assigned a new PVN
and this newly assigned PVN is 0x0066, add pvr register related
support for this PVN.

Signed-off-by: Zhao Ke <ke.zhao@...ngroup.cn>
Link: https://discuss.openpower.foundation/t/how-to-get-a-new-pvr-for-processors-follow-power-isa/477/10
---
 arch/powerpc/include/asm/reg.h            |  1 +
 arch/powerpc/kernel/cpu_specs_book3s_64.h | 15 +++++++++++++++
 arch/powerpc/kvm/book3s_pr.c              |  1 +
 arch/powerpc/mm/book3s64/pkeys.c          |  3 ++-
 arch/powerpc/platforms/powernv/subcore.c  |  3 ++-
 drivers/misc/cxl/cxl.h                    |  3 ++-
 6 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 4ae4ab9090a2..7fd09f25452d 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1361,6 +1361,7 @@
 #define PVR_POWER8E	0x004B
 #define PVR_POWER8NVL	0x004C
 #define PVR_POWER8	0x004D
+#define PVR_HX_C2000	0x0066
 #define PVR_POWER9	0x004E
 #define PVR_POWER10	0x0080
 #define PVR_BE		0x0070
diff --git a/arch/powerpc/kernel/cpu_specs_book3s_64.h b/arch/powerpc/kernel/cpu_specs_book3s_64.h
index c370c1b804a9..4f604934da7c 100644
--- a/arch/powerpc/kernel/cpu_specs_book3s_64.h
+++ b/arch/powerpc/kernel/cpu_specs_book3s_64.h
@@ -238,6 +238,21 @@ static struct cpu_spec cpu_specs[] __initdata = {
 		.machine_check_early	= __machine_check_early_realmode_p8,
 		.platform		= "power8",
 	},
+	{	/* 2.07-compliant processor, HeXin C2000 processor */
+		.pvr_mask		= 0xffffffff,
+		.pvr_value		= 0x00660000,
+		.cpu_name		= "POWER8 (architected)",
+		.cpu_features		= CPU_FTRS_POWER8,
+		.cpu_user_features	= COMMON_USER_POWER8,
+		.cpu_user_features2	= COMMON_USER2_POWER8,
+		.mmu_features		= MMU_FTRS_POWER8,
+		.icache_bsize		= 128,
+		.dcache_bsize		= 128,
+		.cpu_setup		= __setup_cpu_power8,
+		.cpu_restore		= __restore_cpu_power8,
+		.machine_check_early	= __machine_check_early_realmode_p8,
+		.platform		= "power8",
+	},
 	{	/* 3.00-compliant processor, i.e. Power9 "architected" mode */
 		.pvr_mask		= 0xffffffff,
 		.pvr_value		= 0x0f000005,
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 9118242063fb..5b92619a05fd 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -604,6 +604,7 @@ static void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
 	case PVR_POWER8:
 	case PVR_POWER8E:
 	case PVR_POWER8NVL:
+	case PVR_HX_C2000:
 	case PVR_POWER9:
 		vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
 			BOOK3S_HFLAG_NEW_TLBIE;
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c
index 125733962033..c38f378e1942 100644
--- a/arch/powerpc/mm/book3s64/pkeys.c
+++ b/arch/powerpc/mm/book3s64/pkeys.c
@@ -89,7 +89,8 @@ static int __init scan_pkey_feature(void)
 			unsigned long pvr = mfspr(SPRN_PVR);
 
 			if (PVR_VER(pvr) == PVR_POWER8 || PVR_VER(pvr) == PVR_POWER8E ||
-			    PVR_VER(pvr) == PVR_POWER8NVL || PVR_VER(pvr) == PVR_POWER9)
+			    PVR_VER(pvr) == PVR_POWER8NVL || PVR_VER(pvr) == PVR_POWER9 ||
+				PVR_VER(pvr) == PVR_HX_C2000)
 				pkeys_total = 32;
 		}
 	}
diff --git a/arch/powerpc/platforms/powernv/subcore.c b/arch/powerpc/platforms/powernv/subcore.c
index 191424468f10..58e7331e1e7e 100644
--- a/arch/powerpc/platforms/powernv/subcore.c
+++ b/arch/powerpc/platforms/powernv/subcore.c
@@ -425,7 +425,8 @@ static int subcore_init(void)
 
 	if (pvr_ver != PVR_POWER8 &&
 	    pvr_ver != PVR_POWER8E &&
-	    pvr_ver != PVR_POWER8NVL)
+	    pvr_ver != PVR_POWER8NVL &&
+		pvr_ver != PVR_HX_C2000)
 		return 0;
 
 	/*
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 0562071cdd4a..9ac2991b29c7 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -836,7 +836,8 @@ static inline bool cxl_is_power8(void)
 {
 	if ((pvr_version_is(PVR_POWER8E)) ||
 	    (pvr_version_is(PVR_POWER8NVL)) ||
-	    (pvr_version_is(PVR_POWER8)))
+	    (pvr_version_is(PVR_POWER8)) ||
+		(pvr_version_is(PVR_HX_C2000)))
 		return true;
 	return false;
 }
-- 
2.34.1