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Age	Commit message (Collapse)	Author	Files	Lines
2019-10-28	exec: Cache TARGET_PAGE_MASK for TARGET_PAGE_BITS_VARY	Richard Henderson	1	-0/+1
	This eliminates a set of runtime shifts. It turns out that we require TARGET_PAGE_MASK more often than TARGET_PAGE_SIZE, so redefine TARGET_PAGE_SIZE based on TARGET_PAGE_MASK instead of the other way around. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-10-28	exec: Use const alias for TARGET_PAGE_BITS_VARY	Richard Henderson	1	-8/+58
	Using a variable that is declared "const" for this tells the compiler that it may read the value once and assume that it does not change across function calls. For target_page_size, this means we have only one assert per function, and one read of the variable. This reduces the size of qemu-system-aarch64 by 8k. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-10-28	exec: Split out variable page size support to exec-vary.c	Richard Henderson	1	-0/+57
	The next patch will play a trick with "const" that will confuse the compiler about the uses of target_page_bits within exec.c. Moving everything to a new file prevents this confusion. No functional change so far. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>