From f217f0d893ae091cbeac648e3c2724a0a0f19d1c Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:20:47 +0800 Subject: [PATCH 1/6] riscv: Add ISA extension parsing for Zalasr ANBZ: #31320 commit c9651fbc6051d305765f9c7528b90ad6c88ba4f4 upstream. Add parsing for Zalasr ISA extension. Signed-off-by: Xu Lu Link: https://patch.msgid.link/20251020042056.30283-2-luxu.kernel@bytedance.com [pjw@kernel.org: updated to apply] Signed-off-by: Paul Walmsley Signed-off-by: Gao Rui --- arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/kernel/cpufeature.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index 4d3d49d5b634..f743042c827f 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -112,6 +112,7 @@ #define RISCV_ISA_EXT_ZAAMO 97 #define RISCV_ISA_EXT_ZALRSC 98 #define RISCV_ISA_EXT_ZICBOP 99 +#define RISCV_ISA_EXT_ZALASR 100 #define RISCV_ISA_EXT_XLINUXENVCFG 127 diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index ac9b25a63ef4..f39d4faf0ba9 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -431,6 +431,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { __RISCV_ISA_EXT_DATA(zaamo, RISCV_ISA_EXT_ZAAMO), __RISCV_ISA_EXT_DATA(zabha, RISCV_ISA_EXT_ZABHA), __RISCV_ISA_EXT_DATA(zacas, RISCV_ISA_EXT_ZACAS), + __RISCV_ISA_EXT_DATA(zalasr, RISCV_ISA_EXT_ZALASR), __RISCV_ISA_EXT_DATA(zalrsc, RISCV_ISA_EXT_ZALRSC), __RISCV_ISA_EXT_DATA(zawrs, RISCV_ISA_EXT_ZAWRS), __RISCV_ISA_EXT_DATA(zfa, RISCV_ISA_EXT_ZFA), -- Gitee From 8d2aa7fbfaf25db5109644fcf851e35502fd5bb8 Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:20:48 +0800 Subject: [PATCH 2/6] dt-bindings: riscv: Add Zalasr ISA extension description ANBZ: #31320 commit 4640be2588713766b3141998d2e396121b337e41 upstream. Add description for the Zalasr ISA extension Signed-off-by: Xu Lu Acked-by: Conor Dooley Link: https://patch.msgid.link/20251020042056.30283-3-luxu.kernel@bytedance.com Signed-off-by: Paul Walmsley Signed-off-by: Gao Rui --- Documentation/devicetree/bindings/riscv/extensions.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml index 83b98065be72..116cb3c1c491 100644 --- a/Documentation/devicetree/bindings/riscv/extensions.yaml +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml @@ -242,6 +242,11 @@ properties: is supported as ratified at commit 5059e0ca641c ("update to ratified") of the riscv-zacas. + - const: zalasr + description: | + The standard Zalasr extension for load-acquire/store-release as frozen + at commit 194f0094 ("Version 0.9 for freeze") of riscv-zalasr. + - const: zalrsc description: | The standard Zalrsc extension for load-reserved/store-conditional as -- Gitee From 1d71a8d9f997525b8d826657d87ac8f006f24d5a Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:20:49 +0800 Subject: [PATCH 3/6] riscv: hwprobe: Export Zalasr extension ANBZ: #31320 commit f4922b69165735e81752ee47d174f873e989a449 upstream. Export the Zalasr extension to userspace using hwprobe. Signed-off-by: Xu Lu Link: https://patch.msgid.link/20251020042056.30283-4-luxu.kernel@bytedance.com Signed-off-by: Paul Walmsley Signed-off-by: Gao Rui --- Documentation/arch/riscv/hwprobe.rst | 3 +++ arch/riscv/include/uapi/asm/hwprobe.h | 1 + arch/riscv/kernel/sys_hwprobe.c | 1 + 3 files changed, 5 insertions(+) diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst index 24f64f93f45f..9b5ec62da093 100644 --- a/Documentation/arch/riscv/hwprobe.rst +++ b/Documentation/arch/riscv/hwprobe.rst @@ -249,6 +249,9 @@ The following keys are defined: defined in the in the RISC-V ISA manual starting from commit e87412e621f1 ("integrate Zaamo and Zalrsc text (#1304)"). + * :c:macro:`RISCV_HWPROBE_EXT_ZALASR`: The Zalasr extension is supported as + frozen at commit 194f0094 ("Version 0.9 for freeze") of riscv-zalasr. + * :c:macro:`RISCV_HWPROBE_EXT_ZALRSC`: The Zalrsc extension is supported as defined in the in the RISC-V ISA manual starting from commit e87412e621f1 ("integrate Zaamo and Zalrsc text (#1304)"). diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h index 86988a0aa0fc..b1bff5fc165e 100644 --- a/arch/riscv/include/uapi/asm/hwprobe.h +++ b/arch/riscv/include/uapi/asm/hwprobe.h @@ -81,6 +81,7 @@ struct riscv_hwprobe { #define RISCV_HWPROBE_EXT_ZAAMO (1ULL << 56) #define RISCV_HWPROBE_EXT_ZALRSC (1ULL << 57) #define RISCV_HWPROBE_EXT_ZABHA (1ULL << 58) +#define RISCV_HWPROBE_EXT_ZALASR (1ULL << 59) #define RISCV_HWPROBE_KEY_CPUPERF_0 5 #define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0) #define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0) diff --git a/arch/riscv/kernel/sys_hwprobe.c b/arch/riscv/kernel/sys_hwprobe.c index 7a7248a906a4..e2e94147e278 100644 --- a/arch/riscv/kernel/sys_hwprobe.c +++ b/arch/riscv/kernel/sys_hwprobe.c @@ -121,6 +121,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair, EXT_KEY(ZAAMO); EXT_KEY(ZALRSC); EXT_KEY(ZABHA); + EXT_KEY(ZALASR); /* * All the following extensions must depend on the kernel -- Gitee From 06e2b3fa3efb6a294d2f3d673f51afe417fc5138 Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:20:50 +0800 Subject: [PATCH 4/6] riscv: Introduce Zalasr instructions ANBZ: #31320 commit ad1bb4b8525e497c95d48a2d3fd2e81fba4b5ad7 upstream. Introduce l{b|h|w|d}.{aq|aqrl} and s{b|h|w|d}.{rl|aqrl} instruction encodings. Signed-off-by: Xu Lu Reviewed-by: Guo Ren Link: https://patch.msgid.link/20251020042056.30283-5-luxu.kernel@bytedance.com Signed-off-by: Paul Walmsley Signed-off-by: Gao Rui --- arch/riscv/include/asm/insn-def.h | 79 +++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/arch/riscv/include/asm/insn-def.h b/arch/riscv/include/asm/insn-def.h index a8a2a861b202..00ccd69b4a40 100644 --- a/arch/riscv/include/asm/insn-def.h +++ b/arch/riscv/include/asm/insn-def.h @@ -179,6 +179,7 @@ #define RV___RS1(v) __RV_REG(v) #define RV___RS2(v) __RV_REG(v) +#define RV_OPCODE_AMO RV_OPCODE(47) #define RV_OPCODE_MISC_MEM RV_OPCODE(15) #define RV_OPCODE_OP_IMM RV_OPCODE(19) #define RV_OPCODE_SYSTEM RV_OPCODE(115) @@ -208,6 +209,84 @@ __ASM_STR(.error "hlv.d requires 64-bit support") #endif +#define LB_AQ(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(0), FUNC7(26), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LB_AQRL(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(0), FUNC7(27), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LH_AQ(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(1), FUNC7(26), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LH_AQRL(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(1), FUNC7(27), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LW_AQ(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(2), FUNC7(26), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LW_AQRL(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(2), FUNC7(27), \ + RD(dest), RS1(addr), __RS2(0)) + +#define SB_RL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(0), FUNC7(29), \ + __RD(0), RS1(addr), RS2(src)) + +#define SB_AQRL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(0), FUNC7(31), \ + __RD(0), RS1(addr), RS2(src)) + +#define SH_RL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(1), FUNC7(29), \ + __RD(0), RS1(addr), RS2(src)) + +#define SH_AQRL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(1), FUNC7(31), \ + __RD(0), RS1(addr), RS2(src)) + +#define SW_RL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(2), FUNC7(29), \ + __RD(0), RS1(addr), RS2(src)) + +#define SW_AQRL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(2), FUNC7(31), \ + __RD(0), RS1(addr), RS2(src)) + +#ifdef CONFIG_64BIT +#define LD_AQ(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(3), FUNC7(26), \ + RD(dest), RS1(addr), __RS2(0)) + +#define LD_AQRL(dest, addr) \ + INSN_R(OPCODE_AMO, FUNC3(3), FUNC7(27), \ + RD(dest), RS1(addr), __RS2(0)) + +#define SD_RL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(3), FUNC7(29), \ + __RD(0), RS1(addr), RS2(src)) + +#define SD_AQRL(src, addr) \ + INSN_R(OPCODE_AMO, FUNC3(3), FUNC7(31), \ + __RD(0), RS1(addr), RS2(src)) +#else +#define LD_AQ(dest, addr) \ + __ASM_STR(.error "ld.aq requires 64-bit support") + +#define LD_AQRL(dest, addr) \ + __ASM_STR(.error "ld.aqrl requires 64-bit support") + +#define SD_RL(dest, addr) \ + __ASM_STR(.error "sd.rl requires 64-bit support") + +#define SD_AQRL(dest, addr) \ + __ASM_STR(.error "sd.aqrl requires 64-bit support") +#endif + #define SINVAL_VMA(vaddr, asid) \ INSN_R(OPCODE_SYSTEM, FUNC3(0), FUNC7(11), \ __RD(0), RS1(vaddr), RS2(asid)) -- Gitee From 4fc0bcf52926734d303bac828c0381bb0dfabb72 Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:24:56 +0800 Subject: [PATCH 5/6] RISC-V: KVM: Allow Zalasr extensions for Guest/VM ANBZ: #31320 commit 655d330c058f4e16de46d5c9b203008c630b59c8 upstream. Extend the KVM ISA extension ONE_REG interface to allow KVM user space to detect and enable Zalasr extensions for Guest/VM. Signed-off-by: Xu Lu Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251020042457.30915-5-luxu.kernel@bytedance.com Signed-off-by: Anup Patel Signed-off-by: Gao Rui --- arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kvm/vcpu_onereg.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 85cf54a2d717..5a0c21c3551a 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -184,6 +184,7 @@ enum KVM_RISCV_ISA_EXT_ID { KVM_RISCV_ISA_EXT_ZICCRSE, KVM_RISCV_ISA_EXT_ZAAMO, KVM_RISCV_ISA_EXT_ZALRSC, + KVM_RISCV_ISA_EXT_ZALASR, KVM_RISCV_ISA_EXT_MAX, }; diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c index 276abfa3a36c..eb580ea50181 100644 --- a/arch/riscv/kvm/vcpu_onereg.c +++ b/arch/riscv/kvm/vcpu_onereg.c @@ -49,6 +49,7 @@ static const unsigned long kvm_isa_ext_arr[] = { KVM_ISA_EXT_ARR(ZABHA), KVM_ISA_EXT_ARR(ZACAS), KVM_ISA_EXT_ARR(ZAAMO), + KVM_ISA_EXT_ARR(ZALASR), KVM_ISA_EXT_ARR(ZALRSC), KVM_ISA_EXT_ARR(ZAWRS), KVM_ISA_EXT_ARR(ZBA), @@ -147,6 +148,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext) case KVM_RISCV_ISA_EXT_SVVPTC: case KVM_RISCV_ISA_EXT_ZABHA: case KVM_RISCV_ISA_EXT_ZACAS: + case KVM_RISCV_ISA_EXT_ZALASR: case KVM_RISCV_ISA_EXT_ZAWRS: case KVM_RISCV_ISA_EXT_ZBA: case KVM_RISCV_ISA_EXT_ZBB: -- Gitee From 3ca37fe06a4c24c051ecd4e57297a02091c4be28 Mon Sep 17 00:00:00 2001 From: Xu Lu Date: Mon, 20 Oct 2025 12:29:04 +0800 Subject: [PATCH 6/6] RISC-V: KVM: selftests: Add Zalasr extensions to get-reg-list test ANBZ: #31320 commit 671995ff4c308fc1adf01727df670c83434ffb5a upstream. The KVM RISC-V allows Zalasr extensions for Guest/VM so add this extension to get-reg-list test. Signed-off-by: Xu Lu Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20251020042904.32096-1-luxu.kernel@bytedance.com Signed-off-by: Anup Patel Signed-off-by: Gao Rui --- tools/testing/selftests/kvm/riscv/get-reg-list.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/kvm/riscv/get-reg-list.c b/tools/testing/selftests/kvm/riscv/get-reg-list.c index 6c81ed23df8b..80ef88a727d9 100644 --- a/tools/testing/selftests/kvm/riscv/get-reg-list.c +++ b/tools/testing/selftests/kvm/riscv/get-reg-list.c @@ -55,6 +55,7 @@ bool filter_reg(__u64 reg) case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZABHA: case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZACAS: case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZAAMO: + case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZALASR: case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZALRSC: case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZAWRS: case KVM_REG_RISCV_ISA_EXT | KVM_REG_RISCV_ISA_SINGLE | KVM_RISCV_ISA_EXT_ZBA: @@ -446,6 +447,7 @@ static const char *isa_ext_single_id_to_str(__u64 reg_off) KVM_ISA_EXT_ARR(ZABHA), KVM_ISA_EXT_ARR(ZACAS), KVM_ISA_EXT_ARR(ZAAMO), + KVM_ISA_EXT_ARR(ZALASR), KVM_ISA_EXT_ARR(ZALRSC), KVM_ISA_EXT_ARR(ZAWRS), KVM_ISA_EXT_ARR(ZBA), @@ -987,6 +989,7 @@ KVM_ISA_EXT_SIMPLE_CONFIG(svvptc, SVVPTC); KVM_ISA_EXT_SIMPLE_CONFIG(zabha, ZABHA); KVM_ISA_EXT_SIMPLE_CONFIG(zacas, ZACAS); KVM_ISA_EXT_SIMPLE_CONFIG(zaamo, ZAAMO); +KVM_ISA_EXT_SIMPLE_CONFIG(zalasr, ZALASR); KVM_ISA_EXT_SIMPLE_CONFIG(zalrsc, ZALRSC); KVM_ISA_EXT_SIMPLE_CONFIG(zawrs, ZAWRS); KVM_ISA_EXT_SIMPLE_CONFIG(zba, ZBA); @@ -1060,6 +1063,7 @@ struct vcpu_reg_list *vcpu_configs[] = { &config_zacas, &config_zaamo, &config_zalrsc, + &config_zalasr, &config_zawrs, &config_zba, &config_zbb, -- Gitee