Daniel Verkamp b5a2771f6c Revert "x86_64: Redesign MTRR setting" ... This reverts commit e93b16cefc. Reason for revert: breaks starting VMs with less than 256 MB of memory (b/230653701) Original change's description: > x86_64: Redesign MTRR setting > > Currently MTRR setting is: the default cache type is write back and the > pci low mmio range is uncache, then guest memory is WB by default, but > pci high mmio and the gap between ram end and pci start below 4G are WB > also, this part is wrong. In order to fix it, var mtrr should be used to > set pci high mmio as uncache, but pci high mmio is too large to have > enough var mtrrs. > > This commit change MTRR setting as: the default cache type is uncache, > and the guest memory is WB. So memory range below 4G and above 4G are > passed into setup_msrs(). And the variable MTRR registers are limited > and have base and length requirement, so guest memory size is aligned > to 256MB to avoid MTRR failure. > > BUG=None > TEST=check guest mtrr setting with different guest memory size > > Change-Id: I4c18e83ce5e7fac9ac1bf6e174116a69924184ac > Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3578015 > Tested-by: kokoro <noreply+kokoro@google.com> > Reviewed-by: Junichi Uekawa <uekawa@chromium.org> > Commit-Queue: Junichi Uekawa <uekawa@chromium.org> Bug: None Change-Id: If183f028da2081ccedbbdc847311cf12081e569d Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3612468 Reviewed-by: Junichi Uekawa <uekawa@chromium.org> Reviewed-by: Dennis Kempin <denniskempin@google.com> Tested-by: kokoro <noreply+kokoro@google.com>		2022-04-28 03:46:15 +00:00
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src	Revert "x86_64: Redesign MTRR setting"	2022-04-28 03:46:15 +00:00
Cargo.toml	crosvm: Support MSR emulation	2022-04-25 07:50:55 +00:00