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    Subject[PATCH 08/25] x86/sgx: Make SGX IPI callback available internally
    Date
    The ETRACK instruction 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 more usages.

    Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
    ---
    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 9b96f4e0a17a..887648ce6084 100644
    --- a/arch/x86/kernel/cpu/sgx/main.c
    +++ b/arch/x86/kernel/cpu/sgx/main.c
    @@ -170,7 +170,7 @@ 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 9ec3136c7800..ca89d625aa74 100644
    --- a/arch/x86/kernel/cpu/sgx/sgx.h
    +++ b/arch/x86/kernel/cpu/sgx/sgx.h
    @@ -89,6 +89,8 @@ 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
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