On Tue, Jul 30, 2024 at 03:17:29PM +0000, John Allen wrote: > Platform Runtime Mechanism (PRM) introduces a means for the AML > interpreter and OS drivers to invoke runtime handlers from platform > firmware in order to remove the need for certain classes of SMIs. > Further details can be seen in the PRM specification[1]. > > Future AMD platforms will implement a PRM module in firmware that will > include handlers for performing various types of address translation. > The address translation PRM module is documented in chapter 22 of the > publicly available "AMD Family 1Ah Models 00h–0Fh and Models 10h–1Fh > ACPI v6.5 Porting Guide"[2]. > > While the kernel currently has support for calling PRM handlers from the > AML interpreter, it does not support calling PRM handlers directly from > OS drivers. This series implements the direct call interface and uses it > for translating normalized addresses to system physical addresses. > > Thanks, > John > > [1]: > https://uefi.org/sites/default/files/resources/Platform%20Runtime%20Mechanism%20-%20with%20legal%20notice.pdf > [2]: > https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/programmer-references/58088-0.75-pub.pdf > > Tree: git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > Base commit: 8400291e289ee6b2bf9779ff1c83a291501f017b > > John Allen (2): > ACPI: PRM: Add PRM handler direct call support > RAS/AMD/ATL: Translate normalized to system physical addresses using > PRM > > drivers/acpi/prmt.c | 24 ++++++++++++++ > drivers/ras/amd/atl/Kconfig | 4 +++ > drivers/ras/amd/atl/Makefile | 2 ++ > drivers/ras/amd/atl/internal.h | 10 ++++++ > drivers/ras/amd/atl/prm.c | 57 ++++++++++++++++++++++++++++++++++ > drivers/ras/amd/atl/umc.c | 5 +++ > include/linux/prmt.h | 5 +++ > 7 files changed, 107 insertions(+) > create mode 100644 drivers/ras/amd/atl/prm.c > > -- Applied, thanks. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
