From: Nadav Amit <nadav.amit@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, Krish Sadhukhan <krish.sadhukhan@oracle.com>,
Andrew Jones <drjones@redhat.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Nadav Amit <nadav.amit@gmail.com>
Subject: [kvm-unit-tests PATCH v3 0/4] Zero allocated pages
Date: Thu, 9 May 2019 13:05:54 -0700 [thread overview]
Message-ID: <20190509200558.12347-1-nadav.amit@gmail.com> (raw)
For reproducibility, it is best to zero pages before they are used.
There are hidden assumptions on memory being zeroed (by BIOS/KVM), which
might be broken at any given moment. The full argument appears in the
first patch commit log.
Following the first patch that zeros the memory, the rest of the
patch-set removes redundant zeroing do to the additional zeroing.
This patch-set is only tested on x86.
v2->v3:
* Typos [Alexandru]
v1->v2:
* Change alloc_pages() as well
* Remove redundant page zeroing [Andrew]
Nadav Amit (4):
lib/alloc_page: Zero allocated pages
x86: Remove redundant page zeroing
lib: Remove redundant page zeroing
arm: Remove redundant page zeroing
lib/alloc_page.c | 4 ++++
lib/arm/asm/pgtable.h | 2 --
lib/arm/mmu.c | 1 -
lib/arm64/asm/pgtable.h | 1 -
lib/virtio-mmio.c | 1 -
lib/x86/intel-iommu.c | 5 -----
x86/eventinj.c | 1 -
x86/hyperv_connections.c | 4 ----
x86/vmx.c | 10 ----------
x86/vmx_tests.c | 11 -----------
10 files changed, 4 insertions(+), 36 deletions(-)
--
2.17.1
next reply other threads:[~2019-05-10 3:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-09 20:05 Nadav Amit [this message]
2019-05-09 20:05 ` [kvm-unit-tests PATCH v3 1/4] lib/alloc_page: Zero allocated pages Nadav Amit
2019-05-15 9:18 ` Andrew Jones
2019-05-09 20:05 ` [kvm-unit-tests PATCH v3 2/4] x86: Remove redundant page zeroing Nadav Amit
2019-05-09 20:05 ` [kvm-unit-tests PATCH v3 3/4] lib: " Nadav Amit
2019-05-15 9:19 ` Andrew Jones
2019-05-09 20:05 ` [kvm-unit-tests PATCH v3 4/4] arm: " Nadav Amit
2019-05-15 9:27 ` Andrew Jones
2019-05-10 12:55 ` [kvm-unit-tests PATCH v3 0/4] Zero allocated pages Konrad Rzeszutek Wilk
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