mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Tao Lin
28cf7f346d
This adds support for running gVisor on ARM64 systems with 64K page size (e.g., NVIDIA Grace CPU). Key changes: 1. hostarch: Split page size constants into separate files selected by the `pagesize_64k` build tag. 64K pages use PageShift=16 and HugePageShift=29 (512MB huge pages). Remove uint16 from the bytecount interface since 64K (2^16) cannot be represented by uint16. 2. ring0: Move page table layout constants to page-size-specific files. 64K pages use larger page table entries (64K per table) and skip the PUD level. 3. ring0/pagetables: Add 3-level page table walker for 64K pages (PGD→PMD→PTE, no PUD). Each level indexes 8192 entries (13 bits) with 512MB sect pages at the PMD level. 4. sentry/arch: Fix mmap layout constants that overflowed the 48-bit address space with 64K pages. Use fixed values for maxMmapRand64 (1<<45 = 32TB) and minMmapRand64 (1<<30 = 1GB), and compute maxStackRand64 using hostarch.PageShift. 5. Bazel build system: Add `--define=pagesize=64k` support that propagates the `pagesize_64k` Go build tag to all binaries and tests. Build with `bazel build --define=pagesize=64k //runsc:runsc` to enable. Note: Currently only the ptrace platform is supported for 64K pages. KVM and systrap platforms require additional work. Updates #8196
75 lines
1.4 KiB
Python
75 lines
1.4 KiB
Python
load("//tools:defs.bzl", "bzl_library")
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package(
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default_applicable_licenses = ["//:license"],
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default_visibility = ["//:sandbox"],
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licenses = ["notice"],
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)
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bzl_library(
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name = "platforms_bzl",
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srcs = ["platforms.bzl"],
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visibility = ["//:sandbox"],
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)
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bzl_library(
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name = "tags_bzl",
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srcs = ["tags.bzl"],
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visibility = ["//visibility:private"],
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)
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bzl_library(
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name = "defs_bzl",
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srcs = ["defs.bzl"],
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visibility = ["//visibility:private"],
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)
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config_setting(
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name = "amd64",
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constraint_values = [
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"@platforms//cpu:x86_64",
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],
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)
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config_setting(
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name = "arm64",
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constraint_values = [
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"@platforms//cpu:aarch64",
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],
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)
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config_setting(
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name = "riscv64",
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constraint_values = [
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"@platforms//cpu:riscv64",
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],
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)
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genrule(
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name = "version",
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outs = ["version.txt"],
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cmd = "cat bazel-out/stable-status.txt | grep STABLE_VERSION | cut -d' ' -f2- | sed 's/^[^[:digit:]]*//g' >$@",
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stamp = 1,
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tags = [
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"manual",
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"nobuilder",
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"notap",
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],
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visibility = ["//:sandbox"],
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)
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# Page size configurations for ARM64
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config_setting(
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name = "pagesize_64k",
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define_values = {"pagesize": "64k"},
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)
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# Combined config: ARM64 with 64K page size
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config_setting(
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name = "arm64_pagesize_64k",
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constraint_values = [
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"@platforms//cpu:aarch64",
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],
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define_values = {"pagesize": "64k"},
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)
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