diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0037-x86-kaiser-Move-feature-detection-up.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0037-x86-kaiser-Move-feature-detection-up.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0037-x86-kaiser-Move-feature-detection-up.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0037-x86-kaiser-Move-feature-detection-up.patch new file mode 100644 index 00000000..f59d427c --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0037-x86-kaiser-Move-feature-detection-up.patch @@ -0,0 +1,85 @@ +From 8190c42189289770ebddf8dd479aea223665637d Mon Sep 17 00:00:00 2001 +From: Borislav Petkov <bp@suse.de> +Date: Mon, 25 Dec 2017 13:57:16 +0100 +Subject: [PATCH 037/102] x86/kaiser: Move feature detection up + +... before the first use of kaiser_enabled as otherwise funky +things happen: + + about to get started... + (XEN) d0v0 Unhandled page fault fault/trap [#14, ec=0000] + (XEN) Pagetable walk from ffff88022a449090: + (XEN) L4[0x110] = 0000000229e0e067 0000000000001e0e + (XEN) L3[0x008] = 0000000000000000 ffffffffffffffff + (XEN) domain_crash_sync called from entry.S: fault at ffff82d08033fd08 + entry.o#create_bounce_frame+0x135/0x14d + (XEN) Domain 0 (vcpu#0) crashed on cpu#0: + (XEN) ----[ Xen-4.9.1_02-3.21 x86_64 debug=n Not tainted ]---- + (XEN) CPU: 0 + (XEN) RIP: e033:[<ffffffff81007460>] + (XEN) RFLAGS: 0000000000000286 EM: 1 CONTEXT: pv guest (d0v0) + +Signed-off-by: Borislav Petkov <bp@suse.de> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/include/asm/kaiser.h | 2 ++ + arch/x86/kernel/setup.c | 7 +++++++ + arch/x86/mm/kaiser.c | 2 -- + 3 files changed, 9 insertions(+), 2 deletions(-) + +diff --git a/arch/x86/include/asm/kaiser.h b/arch/x86/include/asm/kaiser.h +index 906150d..b5e46aa 100644 +--- a/arch/x86/include/asm/kaiser.h ++++ b/arch/x86/include/asm/kaiser.h +@@ -96,8 +96,10 @@ DECLARE_PER_CPU(unsigned long, x86_cr3_pcid_user); + extern char __per_cpu_user_mapped_start[], __per_cpu_user_mapped_end[]; + + extern int kaiser_enabled; ++extern void __init kaiser_check_boottime_disable(void); + #else + #define kaiser_enabled 0 ++static inline void __init kaiser_check_boottime_disable(void) {} + #endif /* CONFIG_KAISER */ + + /* +diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c +index 9c337b0..545a95a 100644 +--- a/arch/x86/kernel/setup.c ++++ b/arch/x86/kernel/setup.c +@@ -114,6 +114,7 @@ + #include <asm/microcode.h> + #include <asm/mmu_context.h> + #include <asm/kaslr.h> ++#include <asm/kaiser.h> + + /* + * max_low_pfn_mapped: highest direct mapped pfn under 4GB +@@ -1019,6 +1020,12 @@ void __init setup_arch(char **cmdline_p) + */ + init_hypervisor_platform(); + ++ /* ++ * This needs to happen right after XENPV is set on xen and ++ * kaiser_enabled is checked below in cleanup_highmap(). ++ */ ++ kaiser_check_boottime_disable(); ++ + x86_init.resources.probe_roms(); + + /* after parse_early_param, so could debug it */ +diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c +index 2768854..d43f369 100644 +--- a/arch/x86/mm/kaiser.c ++++ b/arch/x86/mm/kaiser.c +@@ -310,8 +310,6 @@ void __init kaiser_init(void) + { + int cpu; + +- kaiser_check_boottime_disable(); +- + if (!kaiser_enabled) + return; + +-- +2.7.4 + |