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| author |  Saurabh Sengar <ssengar@linux.microsoft.com>
| 2024-03-03 00:01:36 -0800 |
|---|---|---|
| committer |  Wei Liu <wei.liu@kernel.org>
| 2024-03-08 23:40:09 +0000 |
| commit | 2b4b90e053a29057fb05ba81acce26bddce8d404 (patch) | |
| tree | 563b6b0c779a3cfbd0da364ae1a6cfadb5158e52 /drivers/hv | |
| parent | hyperv-tlfs: Change prefix of generic HV_REGISTER_* MSRs to HV_MSR_* (diff) | |
| download | linux-2b4b90e053a29057fb05ba81acce26bddce8d404.tar.gz linux-2b4b90e053a29057fb05ba81acce26bddce8d404.tar.bz2 linux-2b4b90e053a29057fb05ba81acce26bddce8d404.zip | |
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/Kconfig | 1 |
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 |