kernel/arch/s390/include/asm/mem_detect.h, branch linux-5.14.y

s390/mem_detect: provide single get_mem_detect_end

2019-08-26T10:51:18Z

get_mem_detect_end is already used in couple of places with potential to be utilized in more cases. Provide single get_mem_detect_end implementation in asm/mem_detect.h to be used by kasan and startup code. Signed-off-by: Vasily Gorbik

s390/mem_detect: replace tprot loop with binary search

2018-10-09T09:21:12Z

In a situation when other memory detection methods are not available (no SCLP and no z/VM diag260), continuous online memory is assumed. Replacing tprot loop with faster binary search, as only online memory end has to be found. Reviewed-by: Heiko Carstens Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/mem_detect: use SCLP info for continuous memory detection

2018-10-09T09:21:11Z

When neither SCLP storage info, nor z/VM diag260 "storage configuration" are available assume a continuous online memory of size specified by SCLP info. Reviewed-by: Heiko Carstens Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/mem_detect: introduce z/VM specific diag260 call

2018-10-09T09:21:10Z

In the case when z/VM memory is defined with "define storage config" command, SCLP storage info is not available. Utilize diag260 "storage configuration" call, to get information about z/VM specific guest memory definitions with potential memory holes. Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/mem_detect: introduce SCLP storage info

2018-10-09T09:21:09Z

SCLP storage info allows to detect continuous and non-continuous online memory under LPAR, z/VM and KVM, when standby memory is defined. Reviewed-by: Heiko Carstens Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky

s390/mem_detect: move tprot loop to early boot phase

2018-10-09T09:21:08Z

Move memory detection to early boot phase. To store online memory regions "struct mem_detect_info" has been introduced together with for_each_mem_detect_block iterator. mem_detect_info is later converted to memblock. Also introduces sclp_early_get_meminfo function to get maximum physical memory and maximum increment number. Reviewed-by: Heiko Carstens Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky