From: Peter Gonda <pgonda@google.com>
Date: Wed, 30 Mar 2022 16:43:06 +0000 (-0700)
Subject: KVM: SEV: Add cond_resched() to loop in sev_clflush_pages()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=00c22013467069197dc006c943ca1f0395ca8aaa;p=linux.git

KVM: SEV: Add cond_resched() to loop in sev_clflush_pages()

Add resched to avoid warning from sev_clflush_pages() with large number
of pages.

Signed-off-by: Peter Gonda <pgonda@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Message-Id: <20220330164306.2376085-1-pgonda@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 75fa6dd268f05..c2fe89ecdb2dd 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -465,6 +465,7 @@ static void sev_clflush_pages(struct page *pages[], unsigned long npages)
 		page_virtual = kmap_atomic(pages[i]);
 		clflush_cache_range(page_virtual, PAGE_SIZE);
 		kunmap_atomic(page_virtual);
+		cond_resched();
 	}
 }