On Fri, May 11, 2018 at 04:20:58PM +1000, Paul Mackerras wrote:
commit debd574f4195e205ba505b25e19b2b797f4bcd94 upstream.
The current code for initializing the VRMA (virtual real memory area) for HPT guests requires the page size of the backing memory to be one of 4kB, 64kB or 16MB. With a radix host we have the possibility that the backing memory page size can be 2MB or 1GB. In these cases, if the guest switches to HPT mode, KVM will not initialize the VRMA and the guest will fail to run.
In fact it is not necessary that the VRMA page size is the same as the backing memory page size; any VRMA page size less than or equal to the backing memory page size is acceptable. Therefore we now choose the largest page size out of the set {4k, 64k, 16M} which is not larger than the backing memory page size.
Signed-off-by: Paul Mackerras paulus@ozlabs.org
arch/powerpc/kvm/book3s_hv.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
Applied, thanks.
greg k-h