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Saurabh Sengar 3d6af30f17 x86/hyperv: Use per cpu initial stack for vtl context

[ Upstream commit 2b4b90e053 ]

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: 3be1bc2fe9 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-03-26 18:20:06 -04:00

hv_apic.c

Merge tag 'hyperv-next-signed-20230902' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2023-09-04 11:26:29 -07:00

hv_init.c

x86/hyperv: Fix the detection of E820_TYPE_PRAM in a Gen2 VM

2023-12-20 17:01:55 +01:00

hv_proc.c

…

hv_spinlock.c

x86/apic: Wrap IPI calls into helper functions

2023-08-09 12:00:55 -07:00