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authorSaurabh Sengar <ssengar@linux.microsoft.com>2024-03-03 00:01:36 -0800
committerWei Liu <wei.liu@kernel.org>2024-03-08 23:40:09 +0000
commit2b4b90e053a29057fb05ba81acce26bddce8d404 (patch)
tree563b6b0c779a3cfbd0da364ae1a6cfadb5158e52 /drivers/hv
parent0e3f7d120086c8b9d6e1ae0dd4917fc529daa1ca (diff)
x86/hyperv: Use per cpu initial stack for vtl context
Currently, the secondary CPUs in Hyper-V VTL context lack support for parallel startup. Therefore, relying on the single initial_stack fetched from the current task structure suffices for all vCPUs. However, common initial_stack risks stack corruption when parallel startup is enabled. In order to facilitate parallel startup, use the initial_stack from the per CPU idle thread instead of the current task. Fixes: 3be1bc2fe9d2 ("x86/hyperv: VTL support for Hyper-V") Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 00242107d62e..862c47b191af 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -16,6 +16,7 @@ config HYPERV
config HYPERV_VTL_MODE
bool "Enable Linux to boot in VTL context"
depends on X86_64 && HYPERV
+ depends on SMP
default n
help
Virtual Secure Mode (VSM) is a set of hypervisor capabilities and