riscv/qemu: QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org - qemu

QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org

emulation kvm qemu virtualization

History

Magnus Kulke 626e5dc999 accel/mshv: Remove remap overlapping mappings code This change removes userland code that worked around a restriction in the mshv driver in the 6.18 kernel: regions from userland couldn't be mapped to multiple regions in the kernel. We maintained a shadow mapping table in qemu and used a heuristic to swap in a requested region in case of UNMAPPED_GPA exits. However, this heuristic wasn't reliable in all cases, since HyperV behaviour is not 100% reliable across versions. HyperV itself doesn't prohibit to map regions at multiple places into the guest, so the restriction has been removed in the mshv driver. Hence we can remove the remapping code. Effectively this will mandate a 6.19 kernel, if the workload attempt to map e.g. BIOS to multiple reagions. I still think it's the right call to remove this logic: - The workaround only seems to work reliably with a certain revision of HyperV as a nested hypervisor. - We expect Direct Virtualization (L1VH) to be the main platform for the mshv accelerator, which also requires a 6.19 kernel This reverts commit `efc4093358`. Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com> Acked-by: Wei Liu (Microsoft) <wei.liu@kernel.org> Tested-by: Mohamed Mediouni <mohamed@unpredictable.fr> Link: https://lore.kernel.org/r/20260113153708.448968-1-magnuskulke@linux.microsoft.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		3 months ago
..
irq.c	mshv: Clean up includes	2 months ago
mem.c	accel/mshv: Remove remap overlapping mappings code	2 months ago
meson.build	target/i386/mshv: Register MSRs with MSHV	6 months ago
mshv-all.c	accel/mshv: Remove remap overlapping mappings code	2 months ago
msr.c	target/i386/mshv: Register MSRs with MSHV	6 months ago
trace-events	accel/mshv: Remove remap overlapping mappings code	2 months ago
trace.h	accel/mshv: Initialize VM partition	6 months ago