[PATCH V3 09/30] x86/sgx: Make sgx_ipi_cb() available internally

Reinette Chatre
2022-04-04T21:25:28Z

The ETRACK function followed by an IPI to all CPUs within an enclave
is a common pattern with more frequent use in support of SGX2.

Make the (empty) IPI callback function available internally in
preparation for usage by SGX2.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
No changes since V2

Changes since V1:
- Replace "for more usages" by "for usage by SGX2" (Jarkko)

arch/x86/kernel/cpu/sgx/main.c | 2 +-
arch/x86/kernel/cpu/sgx/sgx.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index ce9e87d5f8ec..6e2cb7564080 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -172,7 +172,7 @@ static int __sgx_encl_ewb(struct sgx_epc_page *epc_page, void *va_slot,
return ret;
}

-static void sgx_ipi_cb(void *info)
+void sgx_ipi_cb(void *info)
{
}

diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index 0f17def9fe6f..b30cee4de903 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -90,6 +90,8 @@ void sgx_mark_page_reclaimable(struct sgx_epc_page *page);
int sgx_unmark_page_reclaimable(struct sgx_epc_page *page);
struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim);

+void sgx_ipi_cb(void *info);
+
#ifdef CONFIG_X86_SGX_KVM
int __init sgx_vepc_init(void);
#else
--
2.25.1