diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0056-percpu-Introduce-DEFINE_PER_CPU_DECRYPTED.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0056-percpu-Introduce-DEFINE_PER_CPU_DECRYPTED.patch | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0056-percpu-Introduce-DEFINE_PER_CPU_DECRYPTED.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0056-percpu-Introduce-DEFINE_PER_CPU_DECRYPTED.patch deleted file mode 100644 index 326fb11c..00000000 --- a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71-e3000/0056-percpu-Introduce-DEFINE_PER_CPU_DECRYPTED.patch +++ /dev/null @@ -1,99 +0,0 @@ -From eb07f7d793db030645abf9bad60dc9d1f40870a7 Mon Sep 17 00:00:00 2001 -From: Brijesh Singh <brijesh.singh@amd.com> -Date: Fri, 20 Oct 2017 09:30:57 -0500 -Subject: [PATCH 56/95] percpu: Introduce DEFINE_PER_CPU_DECRYPTED - -KVM guest defines three per-CPU variables (steal-time, apf_reason, and -kvm_pic_eoi) which are shared between a guest and a hypervisor. - -When SEV is active, memory is encrypted with a guest-specific key, and if -the guest OS wants to share the memory region with the hypervisor then it -must clear the C-bit (i.e set decrypted) before sharing it. - -DEFINE_PER_CPU_DECRYPTED can be used to define the per-CPU variables -which will be shared between a guest and a hypervisor. - -Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> -Tested-by: Borislav Petkov <bp@suse.de> -Acked-by: Tejun Heo <tj@kernel.org> -Reviewed-by: Borislav Petkov <bp@suse.de> -Cc: linux-arch@vger.kernel.org -Cc: Tom Lendacky <thomas.lendacky@amd.com> -Cc: kvm@vger.kernel.org -Cc: Arnd Bergmann <arnd@arndb.de> -Cc: Borislav Petkov <bp@alien8.de> -Cc: Christoph Lameter <cl@linux.com> -Link: https://lkml.kernel.org/r/20171020143059.3291-16-brijesh.singh@amd.com -Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com> ---- - include/asm-generic/vmlinux.lds.h | 19 +++++++++++++++++++ - include/linux/percpu-defs.h | 15 +++++++++++++++ - 2 files changed, 34 insertions(+) - -diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h -index fcec26d..873d2e70 100644 ---- a/include/asm-generic/vmlinux.lds.h -+++ b/include/asm-generic/vmlinux.lds.h -@@ -779,6 +779,24 @@ - #endif - - /* -+ * Memory encryption operates on a page basis. Since we need to clear -+ * the memory encryption mask for this section, it needs to be aligned -+ * on a page boundary and be a page-size multiple in length. -+ * -+ * Note: We use a separate section so that only this section gets -+ * decrypted to avoid exposing more than we wish. -+ */ -+#ifdef CONFIG_AMD_MEM_ENCRYPT -+#define PERCPU_DECRYPTED_SECTION \ -+ . = ALIGN(PAGE_SIZE); \ -+ *(.data..percpu..decrypted) \ -+ . = ALIGN(PAGE_SIZE); -+#else -+#define PERCPU_DECRYPTED_SECTION -+#endif -+ -+ -+/* - * Default discarded sections. - * - * Some archs want to discard exit text/data at runtime rather than -@@ -816,6 +834,7 @@ - . = ALIGN(cacheline); \ - *(.data..percpu) \ - *(.data..percpu..shared_aligned) \ -+ PERCPU_DECRYPTED_SECTION \ - VMLINUX_SYMBOL(__per_cpu_end) = .; - - /** -diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h -index 8f16299..2d2096b 100644 ---- a/include/linux/percpu-defs.h -+++ b/include/linux/percpu-defs.h -@@ -173,6 +173,21 @@ - DEFINE_PER_CPU_SECTION(type, name, "..read_mostly") - - /* -+ * Declaration/definition used for per-CPU variables that should be accessed -+ * as decrypted when memory encryption is enabled in the guest. -+ */ -+#if defined(CONFIG_VIRTUALIZATION) && defined(CONFIG_AMD_MEM_ENCRYPT) -+ -+#define DECLARE_PER_CPU_DECRYPTED(type, name) \ -+ DECLARE_PER_CPU_SECTION(type, name, "..decrypted") -+ -+#define DEFINE_PER_CPU_DECRYPTED(type, name) \ -+ DEFINE_PER_CPU_SECTION(type, name, "..decrypted") -+#else -+#define DEFINE_PER_CPU_DECRYPTED(type, name) DEFINE_PER_CPU(type, name) -+#endif -+ -+/* - * Intermodule exports for per-CPU variables. sparse forgets about - * address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to - * noop if __CHECKER__. --- -2.7.4 - |