From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: x86@kernel.org, linux-sgx@vger.kernel.org
Cc: akpm@linux-foundation.org, dave.hansen@intel.com,
sean.j.christopherson@intel.com, nhorman@redhat.com,
npmccallum@redhat.com, serge.ayoun@intel.com,
shay.katz-zamir@intel.com, haitao.huang@intel.com,
andriy.shevchenko@linux.intel.com, tglx@linutronix.de,
kai.svahn@intel.com, bp@alien8.de, josh@joshtriplett.org,
luto@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Subject: [PATCH v18 06/25] x86/mm: x86/sgx: Add new 'PF_SGX' page fault error code bit
Date: Sat, 22 Dec 2018 01:11:35 +0200 [thread overview]
Message-ID: <20181221231154.6120-7-jarkko.sakkinen@linux.intel.com> (raw)
In-Reply-To: <20181221231154.6120-1-jarkko.sakkinen@linux.intel.com>
From: Sean Christopherson <sean.j.christopherson@intel.com>
The SGX bit is set in the #PF error code if and only if the fault is
detected by the Enclave Page Cache Map (EPCM), a hardware-managed
table that enforces the paging permissions defined by the enclave,
e.g. to prevent the kernel from changing the permissions of an
enclave's page(s).
Despite triggering a #PF, a #PF with PF_SGX has nothing to do with
paging.
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
arch/x86/include/asm/traps.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 3de69330e6c5..165c93dd700e 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -162,5 +162,6 @@ enum x86_pf_error_code {
X86_PF_RSVD = 1 << 3,
X86_PF_INSTR = 1 << 4,
X86_PF_PK = 1 << 5,
+ X86_PF_SGX = 1 << 15,
};
#endif /* _ASM_X86_TRAPS_H */
--
2.19.1
next prev parent reply other threads:[~2018-12-21 23:13 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-21 23:11 [PATCH v18 00/25] Intel SGX1 support Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 01/25] x86/cpufeatures: Add Intel-defined SGX feature bit Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 02/25] x86/cpufeatures: Add SGX sub-features (as Linux-defined bits) Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 03/25] x86/msr: Add IA32_FEATURE_CONTROL.SGX_ENABLE definition Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 04/25] x86/cpufeatures: Add Intel-defined SGX_LC feature bit Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 05/25] x86/msr: Add SGX Launch Control MSR definitions Jarkko Sakkinen
2018-12-21 23:11 ` Jarkko Sakkinen [this message]
2018-12-21 23:11 ` [PATCH v18 07/25] x86/mm: x86/sgx: Signal SIGSEGV for userspace #PFs w/ PF_SGX Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 08/25] x86/cpu/intel: Detect SGX support and update caps appropriately Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 09/25] x86/sgx: Define SGX1 and SGX2 ENCLS leafs Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 10/25] x86/sgx: Add ENCLS architectural error codes Jarkko Sakkinen
2018-12-24 5:17 ` Jethro Beekman
2018-12-24 11:53 ` Jarkko Sakkinen
2019-01-02 20:54 ` Sean Christopherson
2018-12-21 23:11 ` [PATCH v18 11/25] x86/sgx: Add SGX1 and SGX2 architectural data structures Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 12/25] x86/sgx: Add definitions for SGX's CPUID leaf and variable sub-leafs Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 13/25] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 14/25] x86/sgx: Enumerate and track EPC sections Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 15/25] x86/sgx: Add functions to allocate and free EPC pages Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 16/25] x86/sgx: Add sgx_einit() for initializing enclaves Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 17/25] x86/mpx: pass @mm to kernel_managing_mpx_tables() in mpx_notify_unmap() Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 18/25] x86/sgx: Add the Linux SGX Enclave Driver Jarkko Sakkinen
2018-12-24 5:36 ` Jethro Beekman
2018-12-24 11:55 ` Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 19/25] x86/sgx: Add provisioning Jarkko Sakkinen
2018-12-24 5:36 ` Jethro Beekman
2018-12-24 11:57 ` Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 20/25] x86/sgx: Add swapping code to the SGX driver Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 21/25] x86/sgx: Add a simple swapper for the EPC memory manager Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 22/25] x86/sgx: ptrace() support for the SGX driver Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 23/25] x86/sgx: SGX documentation Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 24/25] selftests/x86: Add a selftest for SGX Jarkko Sakkinen
2018-12-21 23:11 ` [PATCH v18 25/25] x86/sgx: Update MAINTAINERS Jarkko Sakkinen
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