From 1e6c88fafcb4664a501239d1d8665c34b5384648 Mon Sep 17 00:00:00 2001 From: Punit Agrawal Date: Fri, 26 May 2017 12:14:06 +0100 Subject: [PATCH] arm: p2m: Prevent redundant icache flushes When toolstack requests flushing the caches, flush_page_to_ram() is called for each page of the requested domain. This needs to unnecessary icache invalidation operations. Let's take the responsibility of performing icache operations and use the recently introduced flag to prevent redundant icache operations by flush_page_to_ram(). Signed-off-by: Punit Agrawal Reviewed-by: Stefano Stabellini (cherry picked from commit 1a0c3e3e28d6cd072734990efcaaec608bf152b1) --- xen/arch/arm/p2m.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 8b6b150cab..720ef13bac 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -1469,13 +1469,15 @@ int p2m_cache_flush(struct domain *d, gfn_t start, unsigned long nr) /* XXX: Implement preemption */ while ( gfn_x(start) < gfn_x(next_gfn) ) { - flush_page_to_ram(mfn_x(mfn), true); + flush_page_to_ram(mfn_x(mfn), false); start = gfn_add(start, 1); mfn = mfn_add(mfn, 1); } } + invalidate_icache(); + p2m_read_unlock(p2m); return 0; -- 2.39.5