[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH] x86/kexec: Separate code and data by at least 1 cacheline
No functional change, but it performs a bit better. Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- CC: Jan Beulich <JBeulich@xxxxxxxx> CC: Roger Pau Monné <roger.pau@xxxxxxxxxx> v2: * Rebase over metadata changes. --- xen/arch/x86/x86_64/kexec_reloc.S | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xen/arch/x86/x86_64/kexec_reloc.S b/xen/arch/x86/x86_64/kexec_reloc.S index 9f40c80d7c4b..50ba454abd48 100644 --- a/xen/arch/x86/x86_64/kexec_reloc.S +++ b/xen/arch/x86/x86_64/kexec_reloc.S @@ -19,6 +19,7 @@ #include <xen/kimage.h> #include <asm/asm_defns.h> +#include <asm/cache.h> #include <asm/msr-index.h> #include <asm/page.h> #include <asm/machine_kexec.h> @@ -174,6 +175,9 @@ FUNC_LOCAL(compatibility_mode) ud2 END(compatibility_mode) + /* Separate code and data into into different cache lines */ + .balign L1_CACHE_BYTES + DATA_LOCAL(compat_mode_gdt_desc, 4) .word .Lcompat_mode_gdt_end - compat_mode_gdt -1 .quad 0x0000000000000000 /* set in call_32_bit above */ -- 2.39.5
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