[RFC PATCH 19/73] x86/entry: Export 32-bit ignore syscall entry and __ia32_enabled variable

Lai Jiangshan
2024-02-26T14:35:40Z

From: Hou Wenlong <houwenlong.hwl@antgroup.com>

For PVM hypervisor, it ignores 32-bit syscall for guest currenlty.
Therefore, export 32-bit ignore syscall entry and __ia32_enabled
variable for PVM module.

Suggested-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
---
arch/x86/entry/common.c | 1 +
arch/x86/entry/entry_64.S | 1 +
2 files changed, 2 insertions(+)

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 6356060caaf3..00ff701aa1be 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -141,6 +141,7 @@ static __always_inline int syscall_32_enter(struct pt_regs *regs)

#ifdef CONFIG_IA32_EMULATION
bool __ia32_enabled __ro_after_init = !IS_ENABLED(CONFIG_IA32_EMULATION_DEFAULT_DISABLED);
+EXPORT_SYMBOL_GPL(__ia32_enabled);

static int ia32_emulation_override_cmdline(char *arg)
{
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 65bfebebeab6..5b25ea4a16ae 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1527,6 +1527,7 @@ SYM_CODE_START(entry_SYSCALL32_ignore)
mov $-ENOSYS, %eax
sysretl
SYM_CODE_END(entry_SYSCALL32_ignore)
+EXPORT_SYMBOL_GPL(entry_SYSCALL32_ignore)

.pushsection .text, "ax"
__FUNC_ALIGN
--
2.19.1.6.gb485710b