[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 0/5] DOMCTL-based guest magic region allocation for 11 domUs
An error message can seen from the init-dom0less application on direct-mapped 1:1 domains: ``` Allocating magic pages memory.c:238:d0v0 mfn 0x39000 doesn't belong to d1 Error on alloc magic pages ``` This is because populate_physmap() automatically assumes gfn == mfn for direct mapped domains. This cannot be true for the magic pages that are allocated later for 1:1 Dom0less DomUs from the init-dom0less helper application executed in Dom0. For domain using statically allocated memory but not 1:1 direct-mapped, similar error "failed to retrieve a reserved page" can be seen as the reserved memory list is empty at that time. This series tries to fix this issue using a DOMCTL-based approach, because for 1:1 direct-mapped domUs, we need to avoid the RAM regions and inform the toolstack about the region found by hypervisor for mapping the magic pages. Patch 1 introduced a new DOMCTL to get the guest memory map, currently only used for the magic page regions. Patch 2 generalized the extended region finding logic so that it can be reused for other use cases such as finding 1:1 domU magic regions. Patch 3 uses the same approach as finding the extended regions to find the guest magic page regions for direct-mapped DomUs. Patch 4 avoids hardcoding all base addresses of guest magic region in the init-dom0less application by consuming the newly introduced DOMCTL. Patch 5 is a simple patch to do some code duplication clean-up in xc. Gitlab pipeline for this series: https://gitlab.com/xen-project/people/henryw/xen/-/pipelines/1245192195 Henry Wang (5): xen/domctl, tools: Introduce a new domctl to get guest memory map xen/arm: Generalize the extended region finding logic xen/arm: Find unallocated spaces for magic pages of direct-mapped domU xen/memory, tools: Avoid hardcoding GUEST_MAGIC_BASE in init-dom0less tools/libs/ctrl: Simplify xc helpers related to populate_physmap() tools/helpers/init-dom0less.c | 35 ++-- tools/include/xenctrl.h | 11 ++ tools/libs/ctrl/xc_domain.c | 204 +++++++++++++---------- xen/arch/arm/dom0less-build.c | 11 ++ xen/arch/arm/domain.c | 14 ++ xen/arch/arm/domain_build.c | 131 ++++++++++----- xen/arch/arm/domctl.c | 28 +++- xen/arch/arm/include/asm/domain.h | 8 + xen/arch/arm/include/asm/domain_build.h | 4 + xen/arch/arm/include/asm/setup.h | 5 + xen/arch/arm/include/asm/static-memory.h | 7 + xen/arch/arm/static-memory.c | 39 +++++ xen/common/memory.c | 30 +++- xen/include/public/arch-arm.h | 7 + xen/include/public/domctl.h | 29 ++++ xen/include/public/memory.h | 3 +- 16 files changed, 415 insertions(+), 151 deletions(-) -- 2.34.1
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