linux-kernel - [tip: x86/sgx] x86/sgx: Add check for SGX pages to ghes_do_memory

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Date:   Mon, 15 Nov 2021 20:22:29 -0000
From:   "tip-bot2 for Tony Luck" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Tony Luck <tony.luck@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Reinette Chatre <reinette.chatre@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/sgx] x86/sgx: Add check for SGX pages to ghes_do_memory_failure()

The following commit has been merged into the x86/sgx branch of tip:

Commit-ID:     3ad6fd77a2d62e8f4465b429b65805eaf88e1b9e
Gitweb:        https://git.kernel.org/tip/3ad6fd77a2d62e8f4465b429b65805eaf88e1b9e
Author:        Tony Luck <tony.luck@...el.com>
AuthorDate:    Tue, 26 Oct 2021 15:00:50 -07:00
Committer:     Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Mon, 15 Nov 2021 11:13:16 -08:00

x86/sgx: Add check for SGX pages to ghes_do_memory_failure()

SGX EPC pages do not have a "struct page" associated with them so the
pfn_valid() sanity check fails and results in a warning message to
the console.

Add an additional check to skip the warning if the address of the error
is in an SGX EPC page.

Signed-off-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
Tested-by: Reinette Chatre <reinette.chatre@...el.com>
Link: https://lkml.kernel.org/r/20211026220050.697075-8-tony.luck@intel.com
---
 drivers/acpi/apei/ghes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0c8330e..0c5c9ac 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -449,7 +449,7 @@ static bool ghes_do_memory_failure(u64 physical_addr, int flags)
 		return false;
 
 	pfn = PHYS_PFN(physical_addr);
-	if (!pfn_valid(pfn)) {
+	if (!pfn_valid(pfn) && !arch_is_platform_page(physical_addr)) {
 		pr_warn_ratelimited(FW_WARN GHES_PFX
 		"Invalid address in generic error data: %#llx\n",
 		physical_addr);