KarimAllah Ahmed d757c3a9cf kvm: Map PFN-type memory regions as writable (if possible) ...

[ Upstream commit a340b3e229b24a56f1c7f5826b15a3af0f4b13e5 ]

For EPT-violations that are triggered by a read, the pages are also mapped with
write permissions (if their memory region is also writable). That would avoid
getting yet another fault on the same page when a write occurs.

This optimization only happens when you have a "struct page" backing the memory
region. So also enable it for memory regions that do not have a "struct page".

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-04-26 11:02:13 +02:00

..

kvm

kvm: Map PFN-type memory regions as writable (if possible)

2018-04-26 11:02:13 +02:00

lib

KVM: eventfd: fix NULL deref irqbypass consumer

2017-01-12 14:42:34 +01:00

Makefile

virt: Add virt directory to the top Makefile

2015-10-01 15:06:44 +02:00