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x86/sgx: Make sgx_ipi_cb() available internally

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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>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/1179ed4a9c3c1c2abf49d51bfcf2c30b493181cc.1652137848.git.reinette.chatre@intel.com
This commit is contained in:
Reinette Chatre 2022-05-10 11:08:45 -07:00 committed by Dave Hansen
parent f89c2f9bf5
commit c7c6a8a61b
2 changed files with 3 additions and 1 deletions
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2
arch/x86/kernel/cpu/sgx/main.c
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@ -174,7 +174,7 @@ 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)
{
}

2
arch/x86/kernel/cpu/sgx/sgx.h
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@ -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