[PATCH v2 2/7] powerpc: Add support for ISA v3.1
From: Alistair Popple <hidden>
Date: 2020-05-19 00:39:36
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Newer ISA versions are enabled by clearing all bits in the PCR associated with previous versions of the ISA. Enable ISA v3.1 support by updating the PCR mask to include ISA v3.0. This ensures all PCR bits corresponding to earlier architecture versions get cleared thereby enabling ISA v3.1 if supported by the hardware. Signed-off-by: Alistair Popple <redacted> --- arch/powerpc/include/asm/cputable.h | 1 + arch/powerpc/include/asm/reg.h | 3 ++- arch/powerpc/kvm/book3s_hv.c | 3 --- 3 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 40a4d3c6fd99..36f894dea9e7 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h@@ -213,6 +213,7 @@ static inline void cpu_feature_keys_init(void) { } #define CPU_FTR_P9_TIDR LONG_ASM_CONST(0x0000800000000000) #define CPU_FTR_P9_TLBIE_ERAT_BUG LONG_ASM_CONST(0x0001000000000000) #define CPU_FTR_P9_RADIX_PREFETCH_BUG LONG_ASM_CONST(0x0002000000000000) +#define CPU_FTR_ARCH_31 LONG_ASM_CONST(0x0004000000000000) #ifndef __ASSEMBLY__
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 773f76402392..1931b1142599 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h@@ -485,10 +485,11 @@ * determine both the compatibility level which we want to emulate and the * compatibility level which the host is capable of emulating. */ +#define PCR_ARCH_300 0x10 /* Architecture 3.00 */ #define PCR_ARCH_207 0x8 /* Architecture 2.07 */ #define PCR_ARCH_206 0x4 /* Architecture 2.06 */ #define PCR_ARCH_205 0x2 /* Architecture 2.05 */ -#define PCR_LOW_BITS (PCR_ARCH_207 | PCR_ARCH_206 | PCR_ARCH_205) +#define PCR_LOW_BITS (PCR_ARCH_207 | PCR_ARCH_206 | PCR_ARCH_205 | PCR_ARCH_300) #define PCR_MASK ~(PCR_HIGH_BITS | PCR_LOW_BITS) /* PCR Reserved Bits */ #define SPRN_HEIR 0x153 /* Hypervisor Emulated Instruction Register */ #define SPRN_TLBINDEXR 0x154 /* P7 TLB control register */
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 93493f0cbfe8..532215040f3e 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c@@ -344,9 +344,6 @@ static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) vcpu->arch.pvr = pvr; } -/* Dummy value used in computing PCR value below */ -#define PCR_ARCH_300 (PCR_ARCH_207 << 1) - static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) { unsigned long host_pcr_bit = 0, guest_pcr_bit = 0;
--
2.20.1