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In commit 62f43f7c1947c, we set PcdVariableStoreSize to the same value as PcdFlashNvStorageVariableSize (which in turn comes from VARS_LIVE_SIZE in "OvmfPkg.fdf.inc"). This equality between both PCDs is a false requirement from EmuVariableFvbRuntimeDxe. FVB drivers should use PcdFlashNvStorageVariableSize for supporting non-volatile variables (even if they happen to be kept in RAM only), along the other PcdFlashNvStorage* PCDs. Whereas PcdVariableStoreSize is for variables that are volatile at the gRT->SetVariable() / gRT->GetVariable() API level. (PlatformPei too bases the preallocation for EmuVariableFvbRuntimeDxe on PcdFlashNvStorageFtwSpareSize.) Replace PcdVariableStoreSize in EmuVariableFvbRuntimeDxe with the same-value PcdFlashNvStorageVariableSize. This means no change in behavior, and it allows us to increase PcdVariableStoreSize in a later patch without disturbing EmuVariableFvbRuntimeDxe (or PlatformPei). Cc: Anthony Perard <anthony.perard@citrix.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Gary Ching-Pang Lin <glin@suse.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Julien Grall <julien.grall@linaro.org> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Gary Lin <glin@suse.com> Tested-by: Gary Lin <glin@suse.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>