This patch series introduces support for discovering AMD's PSP from an ACPI table and extends the CCP driver to allow binding to that device on x86. This method of PSP discovery is used on Hyper-V when SNP isolation support is exposed to the guest. There is no ACPI node associated with this PSP, so after parsing the ASPT it is registered with the system as a platform_device. I was not quite sure about where to place some of this code but opted for placing the ASPT parsing code in drivers/acpi/ and the platform device creation in arch/x86/ because configuring the irq for the PSP through the ACPI interface requires poking at bits from the architectural vector domain. This was also inspired by the sev-guest device. This series is a prerequisite for nested SNP-host support on Hyper-V but is independent of the SNP-host support patch set. Hyper-V only supports nested SEV-SNP (not SEV or SEV-ES) so the PSP only supports a subset of the full PSP command set. Without SNP-host support (which is not upstream yet), the only PSP command that will succeed is SEV_PLATFORM_STATUS. Jeremi Piotrowski (8): include/acpi: add definition of ASPT table ACPI: ASPT: Add helper to parse table x86/psp: Register PSP platform device when ASP table is present x86/psp: Add IRQ support crypto: cpp - Bind to psp platform device on x86 crypto: ccp - Add vdata for platform device crypto: ccp - Skip DMA coherency check for platform psp crypto: ccp - Allow platform device to be psp master device arch/x86/kernel/Makefile | 2 +- arch/x86/kernel/psp.c | 213 ++++++++++++++++++++++++++++++ drivers/acpi/Makefile | 1 + drivers/acpi/aspt.c | 104 +++++++++++++++ drivers/crypto/ccp/sp-dev.c | 67 +++++++++- drivers/crypto/ccp/sp-dev.h | 16 ++- drivers/crypto/ccp/sp-pci.c | 48 ------- drivers/crypto/ccp/sp-platform.c | 73 +++++++++- include/acpi/actbl1.h | 46 +++++++ include/linux/platform_data/psp.h | 32 +++++ 10 files changed, 544 insertions(+), 58 deletions(-) create mode 100644 arch/x86/kernel/psp.c create mode 100644 drivers/acpi/aspt.c create mode 100644 include/linux/platform_data/psp.h -- 2.25.1
