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cpu: detect zbc extension on riscv64

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Change-Id: Icdd4c279693c67982f37c80a891ecadda8ec108a
Reviewed-on: https://go-review.googlesource.com/c/sys/+/776280
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Florian Lehner <lehner.florian86@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
Tobias Klauser
2026-05-20 12:31:28 -07:00
committed by Gopher Robot
parent 758f71cb83
commit 0a387f7a07
3 changed files with 4 additions and 0 deletions
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cpu/cpu.go
+1
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@@ -236,6 +236,7 @@ var RISCV64 struct {
HasZba bool // Address generation instructions extension
HasZbb bool // Basic bit-manipulation extension
HasZbs bool // Single-bit instructions extension
HasZbc bool // Carryless multiplication extension
HasZvbb bool // Vector Basic Bit-manipulation
HasZvbc bool // Vector Carryless Multiplication
HasZvkb bool // Vector Cryptography Bit-manipulation
cpu/cpu_linux_riscv64.go
+2
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@@ -58,6 +58,7 @@ const (
riscv_HWPROBE_EXT_ZBA = 0x8
riscv_HWPROBE_EXT_ZBB = 0x10
riscv_HWPROBE_EXT_ZBS = 0x20
riscv_HWPROBE_EXT_ZBC = 0x80
riscv_HWPROBE_EXT_ZVBB = 0x20000
riscv_HWPROBE_EXT_ZVBC = 0x40000
riscv_HWPROBE_EXT_ZVKB = 0x80000
@@ -108,6 +109,7 @@ func doinit() {
RISCV64.HasZba = isSet(v, riscv_HWPROBE_EXT_ZBA)
RISCV64.HasZbb = isSet(v, riscv_HWPROBE_EXT_ZBB)
RISCV64.HasZbs = isSet(v, riscv_HWPROBE_EXT_ZBS)
RISCV64.HasZbc = isSet(v, riscv_HWPROBE_EXT_ZBC)
RISCV64.HasZvbb = isSet(v, riscv_HWPROBE_EXT_ZVBB)
RISCV64.HasZvbc = isSet(v, riscv_HWPROBE_EXT_ZVBC)
RISCV64.HasZvkb = isSet(v, riscv_HWPROBE_EXT_ZVKB)
cpu/cpu_riscv64.go
+1
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@@ -16,6 +16,7 @@ func initOptions() {
{Name: "zba", Feature: &RISCV64.HasZba},
{Name: "zbb", Feature: &RISCV64.HasZbb},
{Name: "zbs", Feature: &RISCV64.HasZbs},
{Name: "zbc", Feature: &RISCV64.HasZbc},
// RISC-V Cryptography Extensions
{Name: "zvbb", Feature: &RISCV64.HasZvbb},
{Name: "zvbc", Feature: &RISCV64.HasZvbc},