Re: [PATCH 0/2] vhost-vdpa: skip TPM CRB memory section
On Tue, Jun 20, 2023 at 09:50:52PM +0200, Laurent Vivier wrote: > An error is reported for vhost-vdpa case: > qemu-kvm: vhost_vdpa_listener_region_add received unaligned region > > Marc-André has proposed a fix to this problem by skipping > the memory region owned by the TPM CRB but it seems more generic > to skip not DMA-able memory. > > We have a memory flag for that, RAM_PROTECTED. > > This series expands the memory API to provide a way to initialize > a "protected" memory region and use it with the TPM CRB object. > > For the previous discussions, see > > https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg03670.html > > and from Eric for VFIO: > > https://lore.kernel.org/all/20220506132510.1847942-1-eric.au...@redhat.com/ > https://lore.kernel.org/all/20220524091405.416256-1-eric.au...@redhat.com/ > > Bug: https://bugzilla.redhat.com/show_bug.cgi?id=2141965 > > Thanks, > Laurent > > Laurent Vivier (2): > memory: introduce memory_region_init_ram_protected() > tpm_crb: mark memory as protected Reviewed-by: Peter Xu -- Peter Xu
[PATCH 0/2] vhost-vdpa: skip TPM CRB memory section
An error is reported for vhost-vdpa case: qemu-kvm: vhost_vdpa_listener_region_add received unaligned region Marc-André has proposed a fix to this problem by skipping the memory region owned by the TPM CRB but it seems more generic to skip not DMA-able memory. We have a memory flag for that, RAM_PROTECTED. This series expands the memory API to provide a way to initialize a "protected" memory region and use it with the TPM CRB object. For the previous discussions, see https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg03670.html and from Eric for VFIO: https://lore.kernel.org/all/20220506132510.1847942-1-eric.au...@redhat.com/ https://lore.kernel.org/all/20220524091405.416256-1-eric.au...@redhat.com/ Bug: https://bugzilla.redhat.com/show_bug.cgi?id=2141965 Thanks, Laurent Laurent Vivier (2): memory: introduce memory_region_init_ram_protected() tpm_crb: mark memory as protected hw/tpm/tpm_crb.c | 2 +- include/exec/memory.h | 33 + softmmu/memory.c | 33 +++-- softmmu/physmem.c | 4 ++-- 4 files changed, 63 insertions(+), 9 deletions(-) -- 2.41.0
