This patch didn't make mainline yet (3.15-rc6). This is required for booting in the PowerNV (non-virtualized) platform in little-endian mode.
Sources: - https://github.com/torvalds/linux/commit/5072b7ba14de2b02b1d68f85dc5e81980e1818e7 - http://patchwork.ozlabs.org/patch/350461/ Signed-off-by: Mauricio Faria de Oliveira <mauri...@linux.vnet.ibm.com> --- ...el-powernv-calls-to-support-little-endian.patch | 94 ++++++++++++++++++++ debian/patches/series | 1 + 2 files changed, 95 insertions(+), 0 deletions(-) create mode 100644 debian/patches/bugfix/powerpc/ppc64el-powernv-calls-to-support-little-endian.patch diff --git a/debian/patches/bugfix/powerpc/ppc64el-powernv-calls-to-support-little-endian.patch b/debian/patches/bugfix/powerpc/ppc64el-powernv-calls-to-support-little-endian.patch new file mode 100644 index 0000000..815ff98 --- /dev/null +++ b/debian/patches/bugfix/powerpc/ppc64el-powernv-calls-to-support-little-endian.patch @@ -0,0 +1,94 @@ +https://github.com/torvalds/linux/commit/5072b7ba14de2b02b1d68f85dc5e81980e1818e7 + +From 5072b7ba14de2b02b1d68f85dc5e81980e1818e7 Mon Sep 17 00:00:00 2001 +From: Benjamin Herrenschmidt <b...@kernel.crashing.org> +Date: Wed, 21 Aug 2013 14:52:31 +1000 +Subject: [PATCH] powerpc/powernv: Add calls to support little endian + +Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.or> +Forward-ported-by: Mauricio Faria de Oliveira <mauri...@linux.vnet.ibm.com> + +Index: linux-3.15-rc5/arch/powerpc/include/asm/opal.h +=================================================================== +--- linux-3.15-rc5.orig/arch/powerpc/include/asm/opal.h 2014-05-09 17:10:52.000000000 -0300 ++++ linux-3.15-rc5/arch/powerpc/include/asm/opal.h 2014-05-19 15:31:37.000000000 -0300 +@@ -154,6 +154,7 @@ + #define OPAL_LPC_READ 67 + #define OPAL_LPC_WRITE 68 + #define OPAL_RETURN_CPU 69 ++#define OPAL_REINIT_CPUS 70 + #define OPAL_ELOG_READ 71 + #define OPAL_ELOG_WRITE 72 + #define OPAL_ELOG_ACK 73 +@@ -725,6 +726,11 @@ + uint64_t pestB[OPAL_PHB3_NUM_PEST_REGS]; + }; + ++enum { ++ OPAL_REINIT_CPUS_HILE_BE = (1 << 0), ++ OPAL_REINIT_CPUS_HILE_LE = (1 << 1), ++}; ++ + typedef struct oppanel_line { + const char * line; + uint64_t line_len; +@@ -849,6 +855,7 @@ + uint16_t *pci_error_type, uint16_t *severity); + int64_t opal_pci_poll(uint64_t phb_id); + int64_t opal_return_cpu(void); ++int64_t opal_reinit_cpus(uint64_t flags); + + int64_t opal_xscom_read(uint32_t gcid, uint64_t pcb_addr, __be64 *val); + int64_t opal_xscom_write(uint32_t gcid, uint64_t pcb_addr, uint64_t val); +Index: linux-3.15-rc5/arch/powerpc/platforms/powernv/opal-wrappers.S +=================================================================== +--- linux-3.15-rc5.orig/arch/powerpc/platforms/powernv/opal-wrappers.S 2014-05-09 17:10:52.000000000 -0300 ++++ linux-3.15-rc5/arch/powerpc/platforms/powernv/opal-wrappers.S 2014-05-19 15:31:37.000000000 -0300 +@@ -124,6 +124,7 @@ + OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); + OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); + OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); ++OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS); + OPAL_CALL(opal_read_elog, OPAL_ELOG_READ); + OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK); + OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE); +Index: linux-3.15-rc5/arch/powerpc/platforms/powernv/opal.c +=================================================================== +--- linux-3.15-rc5.orig/arch/powerpc/platforms/powernv/opal.c 2014-05-09 17:10:52.000000000 -0300 ++++ linux-3.15-rc5/arch/powerpc/platforms/powernv/opal.c 2014-05-19 15:31:37.000000000 -0300 +@@ -57,6 +57,21 @@ + static uint64_t last_notified_mask = 0x0ul; + static atomic_t opal_notifier_hold = ATOMIC_INIT(0); + ++static void opal_reinit_cores(void) ++{ ++ /* Do the actual re-init, This will clobber all FPRs, VRs, etc... ++ * ++ * It will preserve non volatile GPRs and HSPRG0/1. It will ++ * also restore HIDs and other SPRs to their original value ++ * but it might clobber a bunch. ++ */ ++#ifdef __BIG_ENDIAN__ ++ opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE); ++#else ++ opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_LE); ++#endif ++} ++ + int __init early_init_dt_scan_opal(unsigned long node, + const char *uname, int depth, void *data) + { +@@ -96,6 +111,13 @@ + printk("OPAL V1 detected !\n"); + } + ++ /* Reinit all cores with the right endian */ ++ opal_reinit_cores(); ++ ++ /* Restore some bits */ ++ if (cur_cpu_spec->cpu_restore) ++ cur_cpu_spec->cpu_restore(); ++ + return 1; + } + diff --git a/debian/patches/series b/debian/patches/series index c313b85..b232b9f 100644 --- a/debian/patches/series +++ b/debian/patches/series @@ -58,6 +58,7 @@ bugfix/arm/omap-musb-choice.patch bugfix/mips/disable-advansys.patch bugfix/arm/ixp4xx_iobe.patch bugfix/m68k/ethernat-kconfig.patch +bugfix/powerpc/ppc64el-powernv-calls-to-support-little-endian.patch # Miscellaneous bug fixes bugfix/all/misc-bmp085-Enable-building-as-a-module.patch -- 1.7.1 -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/1400966342-19173-6-git-send-email-mauri...@linux.vnet.ibm.com
