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Date: Fri, 11 Nov 2022 10:35:19 -0800
From: Kristen Carlson Accardi <kristen@...ux.intel.com>
To: jarkko@...nel.org, dave.hansen@...ux.kernel.org, tj@...nel.org,
linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
cgroups@...r.kernel.org, Dave Hansen <dave.hansen@...ux.intel.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Cc: zhiquan1.li@...el.com,
Kristen Carlson Accardi <kristen@...ux.intel.com>,
Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH 14/26] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup
From: Sean Christopherson <sean.j.christopherson@...el.com>
Expose the top-level reclaim function as sgx_reclaim_epc_pages() for use
by the upcoming EPC cgroup, which will initiate reclaim to enforce
changes to high/max limits.
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Kristen Carlson Accardi <kristen@...ux.intel.com>
Cc: Sean Christopherson <seanjc@...gle.com>
---
arch/x86/kernel/cpu/sgx/main.c | 7 ++++---
arch/x86/kernel/cpu/sgx/sgx.h | 1 +
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index b2c050fcc989..cb6f57caf24c 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -281,6 +281,7 @@ static void sgx_reclaimer_write(struct sgx_epc_page *epc_page,
/**
* sgx_reclaim_pages() - Reclaim EPC pages from the consumers
+ * sgx_reclaim_epc_pages() - Reclaim EPC pages from the consumers
* @nr_to_scan: Number of EPC pages to scan for reclaim
* @ignore_age: Reclaim a page even if it is young
*
@@ -382,7 +383,7 @@ static int __sgx_reclaim_pages(int nr_to_scan, bool ignore_age)
return i;
}
-static int sgx_reclaim_pages(int nr_to_scan, bool ignore_age)
+int sgx_reclaim_epc_pages(int nr_to_scan, bool ignore_age)
{
int ret;
@@ -438,7 +439,7 @@ static int ksgxd(void *p)
sgx_should_reclaim(SGX_NR_HIGH_PAGES));
if (sgx_should_reclaim(SGX_NR_HIGH_PAGES))
- sgx_reclaim_pages(SGX_NR_TO_SCAN, false);
+ sgx_reclaim_epc_pages(SGX_NR_TO_SCAN, false);
}
return 0;
@@ -617,7 +618,7 @@ struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim)
break;
}
- sgx_reclaim_pages(SGX_NR_TO_SCAN, false);
+ sgx_reclaim_epc_pages(SGX_NR_TO_SCAN, false);
}
if (sgx_should_reclaim(SGX_NR_LOW_PAGES))
diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index f3fc027f7cd0..ca51b3c7d905 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -181,6 +181,7 @@ void sgx_reclaim_direct(void);
void sgx_record_epc_page(struct sgx_epc_page *page, unsigned long flags);
int sgx_drop_epc_page(struct sgx_epc_page *page);
struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim);
+int sgx_reclaim_epc_pages(int nr_to_scan, bool ignore_age);
void sgx_ipi_cb(void *info);
--
2.37.3
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