[PATCH v2 12/14] arm64: kvm: Add comments around __kvm_nvhe_ symbol aliases
From: David Brazdil <hidden>
Date: 2020-05-15 10:59:25
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
This patch is part of a series which builds KVM's non-VHE hyp code separately from VHE and the rest of the kernel. With all source files split between VHE/nVHE, add comments around the list of symbols where nVHE code still links against kernel proper. Split them into groups and explain how each group is currently used. Some of these dependencies will be removed in the future. Signed-off-by: David Brazdil <redacted> --- arch/arm64/kernel/image-vars.h | 47 ++++++++++++++++++++++------------ 1 file changed, 30 insertions(+), 17 deletions(-)
diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index 217e5e5a101d..0b3a3fe07a64 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h@@ -61,23 +61,36 @@ __efistub__ctype = _ctype; * memory mappings. */ -__kvm_nvhe___icache_flags = __icache_flags; -__kvm_nvhe___kvm_handle_stub_hvc = __kvm_handle_stub_hvc; -__kvm_nvhe_arm64_const_caps_ready = arm64_const_caps_ready; -__kvm_nvhe_arm64_enable_wa2_handling = arm64_enable_wa2_handling; -__kvm_nvhe_arm64_ssbd_callback_required = arm64_ssbd_callback_required; -__kvm_nvhe_cpu_hwcap_keys = cpu_hwcap_keys; -__kvm_nvhe_cpu_hwcaps = cpu_hwcaps; -__kvm_nvhe_kimage_voffset = kimage_voffset; -__kvm_nvhe_kvm_host_data = kvm_host_data; -__kvm_nvhe_kvm_patch_vector_branch = kvm_patch_vector_branch; -__kvm_nvhe_kvm_update_va_mask = kvm_update_va_mask; -__kvm_nvhe_kvm_vgic_global_state = kvm_vgic_global_state; -__kvm_nvhe_panic = panic; -__kvm_nvhe_sve_load_state = sve_load_state; -__kvm_nvhe_sve_save_state = sve_save_state; -__kvm_nvhe_vgic_v2_cpuif_trap = vgic_v2_cpuif_trap; -__kvm_nvhe_vgic_v3_cpuif_trap = vgic_v3_cpuif_trap; +/* If nVHE code panics, it ERETs into panic() in EL1. */ +__kvm_nvhe_panic = panic; + +/* Stub HVC IDs are routed to a handler in .hyp.idmap.text. Executed in EL2. */ +__kvm_nvhe___kvm_handle_stub_hvc = __kvm_handle_stub_hvc; + +/* Alternative callbacks, referenced in .altinstructions. Executed in EL1. */ +__kvm_nvhe_arm64_enable_wa2_handling = arm64_enable_wa2_handling; +__kvm_nvhe_kvm_patch_vector_branch = kvm_patch_vector_branch; +__kvm_nvhe_kvm_update_va_mask = kvm_update_va_mask; + +/* Values used to convert between memory mappings, read-only after init. */ +__kvm_nvhe_kimage_voffset = kimage_voffset; + +/* Data shared with the kernel. */ +__kvm_nvhe_cpu_hwcaps = cpu_hwcaps; +__kvm_nvhe_cpu_hwcap_keys = cpu_hwcap_keys; +__kvm_nvhe___icache_flags = __icache_flags; +__kvm_nvhe_kvm_vgic_global_state = kvm_vgic_global_state; +__kvm_nvhe_arm64_ssbd_callback_required = arm64_ssbd_callback_required; +__kvm_nvhe_kvm_host_data = kvm_host_data; + +/* Static keys shared with the kernel. */ +__kvm_nvhe_arm64_const_caps_ready = arm64_const_caps_ready; +__kvm_nvhe_vgic_v2_cpuif_trap = vgic_v2_cpuif_trap; +__kvm_nvhe_vgic_v3_cpuif_trap = vgic_v3_cpuif_trap; + +/* SVE support, currently unused by nVHE. */ +__kvm_nvhe_sve_save_state = sve_save_state; +__kvm_nvhe_sve_load_state = sve_load_state; #endif /* CONFIG_KVM */
--
2.26.2
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel