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KVM: arm64: Expose PSCI SYSTEM_RESET2 call to the guest

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PSCI v1.1 introduces the optional SYSTEM_RESET2 call, which allows the
caller to provide a vendor-specific "reset type" and "cookie" to request
a particular form of reset or shutdown.

Expose this call to the guest and handle it in the same way as PSCI
SYSTEM_RESET, along with some basic range checking on the type argument.

Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220221153524.15397-3-will@kernel.org
This commit is contained in:
Will Deacon 2022-02-21 15:35:23 +00:00 • committed by Marc Zyngier
parent 512865d83f
commit d43583b890
2 changed files with 33 additions and 4 deletions
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4
include/uapi/linux/psci.h
View file

@ -82,6 +82,10 @@
#define PSCI_0_2_TOS_UP_NO_MIGRATE 1
#define PSCI_0_2_TOS_MP 2
/* PSCI v1.1 reset type encoding for SYSTEM_RESET2 */
#define PSCI_1_1_RESET_TYPE_SYSTEM_WARM_RESET 0
#define PSCI_1_1_RESET_TYPE_VENDOR_START 0x80000000U
/* PSCI version decoding (independent of PSCI version) */
#define PSCI_VERSION_MAJOR_SHIFT 16
#define PSCI_VERSION_MINOR_MASK \