Messages in this thread | ![/](/images/icornerl.gif) | | From | Kai Huang <> | Subject | [PATCH v4 0/5] TDX host: kexec() support | Date | Thu, 18 Apr 2024 23:48:00 +1200 |
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Currently kexec() support and TDX host are muturally exclusive in the Kconfig. This series adds the TDX host kexec support so that they can work together and can be enabled at the same time in the Kconfig.
v3 -> v4: - Updated changelog and comments of patch 1/2 per comments from Kirill and Tom (see specific patch for details).
v3: https://lore.kernel.org/linux-kernel/cover.1712493366.git.kai.huang@intel.com/
v2 -> v3: - Change to only do WBINVD for bare-metal, as Kirill/Tom pointed out WBINVD in TDX guests and SEV-ES/SEV-SNP guests triggers #VE.
v2: https://lore.kernel.org/linux-kernel/cover.1710811610.git.kai.huang@intel.com/
v1 -> v2: - Do unconditional WBINVD during kexec() -- Boris - Change to cover crash kexec() -- Rick - Add a new patch (last one) to add a mechanism to reset all TDX private pages due to having to cover crash kexec(). - Other code improvements -- Dave - Rebase to latest tip/master.
v1: https://lore.kernel.org/linux-kernel/cover.1706698706.git.kai.huang@intel.com/
Hi Dave, Kirill, Sean, Paolo,
The last patch provides a new mechanism to handle all other TDX private pages when they become possible to exist, e.g., when KVM is ready to run TDX guests. It covers both normal kexec and crash kexec. Strictly speaking, it is not mandatory to be in this series though. I appreciate if you can help to review.
Hi Tom, Ashish,
This series touches AMD SME code too, and I don't have AMD machine to test. I appreciate if you can help to review and/or test.
Kai Huang (5): x86/kexec: do unconditional WBINVD for bare-metal in stop_this_cpu() x86/kexec: do unconditional WBINVD for bare-metal in relocate_kernel() x86/kexec: Reset TDX private memory on platforms with TDX erratum x86/virt/tdx: Remove the !KEXEC_CORE dependency x86/virt/tdx: Add TDX memory reset notifier to reset other private pages
arch/x86/Kconfig | 1 - arch/x86/include/asm/kexec.h | 2 +- arch/x86/include/asm/tdx.h | 16 +++++ arch/x86/kernel/machine_kexec_64.c | 29 ++++++-- arch/x86/kernel/process.c | 19 +++-- arch/x86/kernel/relocate_kernel_64.S | 19 +++-- arch/x86/virt/vmx/tdx/tdx.c | 100 +++++++++++++++++++++++++++ 7 files changed, 165 insertions(+), 21 deletions(-)
base-commit: 1e0fd81e4f32a8a383c05d27a672d742b45c1088 -- 2.43.2
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