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From: Tony Luck <tony.luck@intel.com>
To: Sean Christopherson <seanjc@google.com>,
	Jarkko Sakkinen <jarkko.sakkinen@intel.com>,
	Dave Hansen <dave.hansen@intel.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	Tony Luck <tony.luck@intel.com>
Subject: [PATCH v2 2/6] x86/sgx: Add infrastructure to identify SGX EPC pages
Date: Mon, 19 Jul 2021 11:20:05 -0700	[thread overview]
Message-ID: <20210719182009.1409895-3-tony.luck@intel.com> (raw)
In-Reply-To: <20210719182009.1409895-1-tony.luck@intel.com>

X86 machine check architecture reports a physical address when there
is a memory error. Handling that error requires a method to determine
whether the physical address reported is in any of the areas reserved
for EPC pages by BIOS.

Add an end_phys_addr field to the sgx_epc_section structure and a
new function sgx_paddr_to_page() that searches all such structures
and returns the struct sgx_epc_page pointer if the address is an EPC
page. This function is only intended for use within SGX code.

Export a function sgx_is_epc_page() that simply reports whether an
address is an EPC page for use elsewhere in the kernel.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
 arch/x86/kernel/cpu/sgx/main.c | 24 ++++++++++++++++++++++++
 arch/x86/kernel/cpu/sgx/sgx.h  |  1 +
 2 files changed, 25 insertions(+)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index d61bc1f635a1..41753f81a071 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -654,6 +654,7 @@ static bool __init sgx_setup_epc_section(u64 phys_addr, u64 size,
 	}
 
 	section->phys_addr = phys_addr;
+	section->end_phys_addr = phys_addr + size - 1;
 
 	for (i = 0; i < nr_pages; i++) {
 		section->pages[i].section = index;
@@ -665,6 +666,29 @@ static bool __init sgx_setup_epc_section(u64 phys_addr, u64 size,
 	return true;
 }
 
+static struct sgx_epc_page *sgx_paddr_to_page(u64 paddr)
+{
+	struct sgx_epc_section *section;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(sgx_epc_sections); i++) {
+		section = &sgx_epc_sections[i];
+
+		if (paddr < section->phys_addr || paddr > section->end_phys_addr)
+			continue;
+
+		return &section->pages[PFN_DOWN(paddr - section->phys_addr)];
+	}
+
+	return NULL;
+}
+
+bool sgx_is_epc_page(u64 paddr)
+{
+	return !!sgx_paddr_to_page(paddr);
+}
+EXPORT_SYMBOL_GPL(sgx_is_epc_page);
+
 /**
  * A section metric is concatenated in a way that @low bits 12-31 define the
  * bits 12-31 of the metric and @high bits 0-19 define the bits 32-51 of the
diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index 4e1a410b8a62..226b081a4d05 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -50,6 +50,7 @@ struct sgx_numa_node {
  */
 struct sgx_epc_section {
 	unsigned long phys_addr;
+	unsigned long end_phys_addr;
 	void *virt_addr;
 	struct sgx_epc_page *pages;
 	struct sgx_numa_node *node;
-- 
2.29.2


  parent reply	other threads:[~2021-07-19 18:42 UTC|newest]

Thread overview: 187+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-08 18:14 [PATCH 0/4] Basic recovery for machine checks inside SGX Tony Luck
2021-07-08 18:14 ` [PATCH 1/4] x86/sgx: Track phase and type of SGX EPC pages Tony Luck
2021-07-09 18:08   ` Jarkko Sakkinen
2021-07-09 18:09     ` Jarkko Sakkinen
2021-07-14 20:42   ` Reinette Chatre
2021-07-14 20:59     ` Luck, Tony
2021-07-14 21:21       ` Reinette Chatre
2021-07-14 23:08         ` Sean Christopherson
2021-07-14 23:39           ` Luck, Tony
2021-07-15 15:33             ` Sean Christopherson
2021-07-08 18:14 ` [PATCH 2/4] x86/sgx: Add basic infrastructure to recover from errors in SGX memory Tony Luck
2021-07-08 18:14 ` [PATCH 3/4] x86/sgx: Hook sgx_memory_failure() into mainline code Tony Luck
2021-07-08 18:14 ` [PATCH 4/4] x86/sgx: Add hook to error injection address validation Tony Luck
2021-07-19 18:20 ` [PATCH v2 0/6] Basic recovery for machine checks inside SGX Tony Luck
2021-07-19 18:20   ` [PATCH v2 1/6] x86/sgx: Provide indication of life-cycle of EPC pages Tony Luck
2021-07-19 18:28     ` Dave Hansen
2021-07-27  2:04     ` Sakkinen, Jarkko
2021-07-19 18:20   ` Tony Luck [this message]
2021-07-19 18:20   ` [PATCH v2 3/6] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-07-27  2:08     ` Sakkinen, Jarkko
2021-07-19 18:20   ` [PATCH v2 4/6] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-07-19 18:20   ` [PATCH v2 5/6] x86/sgx: Hook sgx_memory_failure() into mainline code Tony Luck
2021-07-19 18:20   ` [PATCH v2 6/6] x86/sgx: Add hook to error injection address validation Tony Luck
2021-07-27  1:54   ` [PATCH v2 0/6] Basic recovery for machine checks inside SGX Sakkinen, Jarkko
2021-07-28 20:46   ` [PATCH v3 0/7] " Tony Luck
2021-07-28 20:46     ` [PATCH v3 1/7] x86/sgx: Provide indication of life-cycle of EPC pages Tony Luck
2021-07-28 22:12       ` Dave Hansen
2021-07-28 22:57         ` Luck, Tony
2021-07-28 23:12           ` Dave Hansen
2021-07-28 23:32             ` Sean Christopherson
2021-07-28 23:48               ` Luck, Tony
2021-07-29  0:07                 ` Sean Christopherson
2021-07-29  0:42                   ` Luck, Tony
2021-07-30  0:34           ` Jarkko Sakkinen
2021-07-30  0:33         ` Jarkko Sakkinen
2021-07-28 20:46     ` [PATCH v3 2/7] x86/sgx: Add infrastructure to identify SGX " Tony Luck
2021-07-28 22:19       ` Dave Hansen
2021-07-30  0:38         ` Jarkko Sakkinen
2021-07-30 16:46           ` Sean Christopherson
2021-07-30 16:50             ` Dave Hansen
2021-07-30 18:44               ` Luck, Tony
2021-07-30 20:35                 ` Dave Hansen
2021-07-30 23:35                   ` Luck, Tony
2021-08-03 21:34                     ` Matthew Wilcox
2021-08-03 23:49                       ` Luck, Tony
2021-08-02  8:52                 ` Jarkko Sakkinen
2021-08-02  8:51               ` Jarkko Sakkinen
2021-08-02  8:48             ` Jarkko Sakkinen
2021-07-28 20:46     ` [PATCH v3 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-07-30  0:42       ` Jarkko Sakkinen
2021-07-28 20:46     ` [PATCH v3 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-07-28 22:29       ` Dave Hansen
2021-07-28 23:00         ` Sean Christopherson
2021-07-28 20:46     ` [PATCH v3 5/7] x86/sgx: Hook sgx_memory_failure() into mainline code Tony Luck
2021-07-28 20:46     ` [PATCH v3 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-07-28 20:46     ` [PATCH v3 7/7] x86/sgx: Add documentation for SGX memory errors Tony Luck
2021-08-27 19:55     ` [PATCH v4 0/6] Basic recovery for machine checks inside SGX Tony Luck
2021-08-27 19:55       ` [PATCH v4 1/6] x86/sgx: Provide indication of life-cycle of EPC pages Tony Luck
2021-09-01  3:55         ` Jarkko Sakkinen
2021-08-27 19:55       ` [PATCH v4 2/6] x86/sgx: Add infrastructure to identify SGX " Tony Luck
2021-09-01  4:30         ` Jarkko Sakkinen
2021-08-27 19:55       ` [PATCH v4 3/6] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-08-27 19:55       ` [PATCH v4 4/6] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-08-27 19:55       ` [PATCH v4 5/6] x86/sgx: Hook sgx_memory_failure() into mainline code Tony Luck
2021-09-03  6:12         ` Jarkko Sakkinen
2021-09-03  6:56           ` Jarkko Sakkinen
2021-09-06 18:51             ` Luck, Tony
2021-09-07 14:07               ` Jarkko Sakkinen
2021-09-07 14:13                 ` Dave Hansen
2021-09-07 15:07                   ` Luck, Tony
2021-09-07 15:03                 ` Luck, Tony
2021-09-07 15:08                   ` Jarkko Sakkinen
2021-09-07 17:46                     ` Luck, Tony
2021-09-08  0:59                       ` Luck, Tony
2021-09-08 16:49                         ` Dave Hansen
2021-09-08  2:29                       ` Jarkko Sakkinen
2021-08-27 19:55       ` [PATCH v4 6/6] x86/sgx: Add hook to error injection address validation Tony Luck
2021-08-27 20:28       ` [PATCH v4 0/6] Basic recovery for machine checks inside SGX Borislav Petkov
2021-08-27 20:43         ` Sean Christopherson
2021-09-01  2:06       ` Jarkko Sakkinen
2021-09-01 14:48         ` Luck, Tony
2021-09-17 21:38       ` [PATCH v5 0/7] " Tony Luck
2021-09-17 21:38         ` [PATCH v5 1/7] x86/sgx: Provide indication of life-cycle of EPC pages Tony Luck
2021-09-21 21:28           ` Jarkko Sakkinen
2021-09-21 21:34             ` Luck, Tony
2021-09-22  5:17               ` Jarkko Sakkinen
2021-09-21 22:15             ` Dave Hansen
2021-09-22  5:27               ` Jarkko Sakkinen
2021-09-17 21:38         ` [PATCH v5 2/7] x86/sgx: Add infrastructure to identify SGX " Tony Luck
2021-09-21 20:23           ` Dave Hansen
2021-09-21 20:50             ` Luck, Tony
2021-09-21 22:32               ` Dave Hansen
2021-09-21 23:48                 ` Luck, Tony
2021-09-21 23:50                   ` Dave Hansen
2021-09-17 21:38         ` [PATCH v5 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-09-17 21:38         ` [PATCH v5 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-09-17 21:38         ` [PATCH v5 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-09-17 21:38         ` [PATCH v5 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-09-17 21:38         ` [PATCH v5 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-09-22 18:21         ` [PATCH v6 0/7] Basic recovery for machine checks inside SGX Tony Luck
2021-09-22 18:21           ` [PATCH v6 1/7] x86/sgx: Provide indication of life-cycle of EPC pages Tony Luck
2021-09-23 20:21             ` Jarkko Sakkinen
2021-09-23 20:24               ` Jarkko Sakkinen
2021-09-23 20:46                 ` Luck, Tony
2021-09-23 22:11                   ` Luck, Tony
2021-09-28  2:13                     ` Jarkko Sakkinen
2021-09-22 18:21           ` [PATCH v6 2/7] x86/sgx: Add infrastructure to identify SGX " Tony Luck
2021-09-22 18:21           ` [PATCH v6 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-09-22 18:21           ` [PATCH v6 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-09-22 18:21           ` [PATCH v6 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-09-22 18:21           ` [PATCH v6 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-09-22 18:21           ` [PATCH v6 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-09-27 21:34           ` [PATCH v7 0/7] Basic recovery for machine checks inside SGX Tony Luck
2021-09-27 21:34             ` [PATCH v7 1/7] x86/sgx: Add new sgx_epc_page flag bit to mark in-use pages Tony Luck
2021-09-28  2:28               ` Jarkko Sakkinen
2021-09-27 21:34             ` [PATCH v7 2/7] x86/sgx: Add infrastructure to identify SGX EPC pages Tony Luck
2021-09-28  2:30               ` Jarkko Sakkinen
2021-09-27 21:34             ` [PATCH v7 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-09-28  2:46               ` Jarkko Sakkinen
2021-09-28 15:41                 ` Luck, Tony
2021-09-28 20:11                   ` Jarkko Sakkinen
2021-09-28 20:53                     ` Luck, Tony
2021-09-30 14:40                       ` Jarkko Sakkinen
2021-09-30 18:02                         ` Luck, Tony
2021-09-27 21:34             ` [PATCH v7 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-09-27 21:34             ` [PATCH v7 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-09-27 21:34             ` [PATCH v7 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-09-27 21:34             ` [PATCH v7 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-10-01 16:47             ` [PATCH v8 0/7] Basic recovery for machine checks inside SGX Tony Luck
2021-10-01 16:47               ` [PATCH v8 1/7] x86/sgx: Add new sgx_epc_page flag bit to mark in-use pages Tony Luck
2021-10-01 16:47               ` [PATCH v8 2/7] x86/sgx: Add infrastructure to identify SGX EPC pages Tony Luck
2021-10-01 16:47               ` [PATCH v8 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-10-04 23:24                 ` Jarkko Sakkinen
2021-10-01 16:47               ` [PATCH v8 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-10-04 23:30                 ` Jarkko Sakkinen
2021-10-01 16:47               ` [PATCH v8 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-10-01 16:47               ` [PATCH v8 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-10-01 16:47               ` [PATCH v8 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-10-04 21:56               ` [PATCH v8 0/7] Basic recovery for machine checks inside SGX Reinette Chatre
2021-10-11 18:59               ` [PATCH v9 " Tony Luck
2021-10-11 18:59                 ` [PATCH v9 1/7] x86/sgx: Add new sgx_epc_page flag bit to mark in-use pages Tony Luck
2021-10-15 22:57                   ` Sean Christopherson
2021-10-11 18:59                 ` [PATCH v9 2/7] x86/sgx: Add infrastructure to identify SGX EPC pages Tony Luck
2021-10-22 10:43                   ` kernel test robot
2021-10-22 10:43                     ` kernel test robot
2021-10-11 18:59                 ` [PATCH v9 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-10-15 23:07                   ` Sean Christopherson
2021-10-15 23:32                     ` Luck, Tony
2021-10-11 18:59                 ` [PATCH v9 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-10-15 23:10                   ` Sean Christopherson
2021-10-15 23:19                     ` Luck, Tony
2021-10-11 18:59                 ` [PATCH v9 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-10-12 16:49                   ` Jarkko Sakkinen
2021-10-11 18:59                 ` [PATCH v9 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-10-12 16:50                   ` Jarkko Sakkinen
2021-10-11 18:59                 ` [PATCH v9 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-10-12 16:51                   ` Jarkko Sakkinen
2021-10-12 16:48                 ` [PATCH v9 0/7] Basic recovery for machine checks inside SGX Jarkko Sakkinen
2021-10-12 17:57                   ` Luck, Tony
2021-10-18 20:25                 ` [PATCH v10 " Tony Luck
2021-10-18 20:25                   ` [PATCH v10 1/7] x86/sgx: Add new sgx_epc_page flag bit to mark free pages Tony Luck
2021-10-18 20:25                   ` [PATCH v10 2/7] x86/sgx: Add infrastructure to identify SGX EPC pages Tony Luck
2021-11-19 12:25                     ` kernel test robot
2021-11-19 12:25                       ` kernel test robot
2021-10-18 20:25                   ` [PATCH v10 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-10-18 20:25                   ` [PATCH v10 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-10-18 20:25                   ` [PATCH v10 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-10-20  9:06                     ` Naoya Horiguchi
2021-10-20 17:04                       ` Luck, Tony
2021-10-18 20:25                   ` [PATCH v10 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-10-18 20:25                   ` [PATCH v10 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-10-26 22:00                   ` [PATCH v11 0/7] Basic recovery for machine checks inside SGX Tony Luck
2021-10-26 22:00                     ` [PATCH v11 1/7] x86/sgx: Add new sgx_epc_page flag bit to mark free pages Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 2/7] x86/sgx: Add infrastructure to identify SGX EPC pages Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 3/7] x86/sgx: Initial poison handling for dirty and free pages Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 4/7] x86/sgx: Add SGX infrastructure to recover from poison Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 5/7] x86/sgx: Hook arch_memory_failure() into mainline code Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 6/7] x86/sgx: Add hook to error injection address validation Tony Luck
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck
2021-10-26 22:00                     ` [PATCH v11 7/7] x86/sgx: Add check for SGX pages to ghes_do_memory_failure() Tony Luck
2021-10-29 18:39                       ` Rafael J. Wysocki
2021-11-15 20:22                       ` [tip: x86/sgx] " tip-bot2 for Tony Luck

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