mirror of https://github.com/acidanthera/audk.git
e4a1d5a7c4
Commit:24e4ad7 (OvmfPkg: Add AmdSevDxe driver) added a driver which runs early in DXE phase and clears the C-bit from NonExistent entry -- which is later split and accommodate the flash MMIO. When SMM is enabled, we build two sets of page tables; first page table is used when executing code in non SMM mode (SMM-less-pgtable) and second page table is used when we are executing code in SMM mode (SMM-pgtable). During boot time, AmdSevDxe driver clears the C-bit from the SMM-less-pgtable. But when SMM is enabled, Qemu Flash services are used from SMM mode. In this patch we explicitly clear the C-bit from Qemu flash MMIO range before we probe the flash. When OVMF is built with SMM_REQUIRE then call to initialize the flash services happen after the SMM-pgtable is created and processor has served the first SMI. At this time we will have access to the SMM-pgtable. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> [lersek@redhat.com: trivial coding style improvements] Reviewed-by: Laszlo Ersek <lersek@redhat.com> |
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| .. | ||
| FvbInfo.c | ||
| FvbServicesRuntimeDxe.inf | ||
| FvbServicesSmm.inf | ||
| FwBlockService.c | ||
| FwBlockService.h | ||
| FwBlockServiceDxe.c | ||
| FwBlockServiceSmm.c | ||
| QemuFlash.c | ||
| QemuFlash.h | ||
| QemuFlashDxe.c | ||
| QemuFlashSmm.c | ||