From 166fb177e4706b9eace88f06687ae1fedf79c143 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Thu, 13 Oct 2022 15:42:40 -0700 Subject: [PATCH 1/3] MAINTAINERS: update the 'T:' entry for xtensa All development activity for xtensa architecture have been routed through the github.com/jcmvbkbc/linux-xtensa tree for the last few years. Update the 'T:' entry in the MAINTAINERS file to reflect that. Github deprecated the git:// links about a year ago, so let's move to the https:// URLs instead. Reported-by: Conor Dooley Link: https://github.blog/2021-09-01-improving-git-protocol-security-github/ Signed-off-by: Palmer Dabbelt Signed-off-by: Max Filippov --- MAINTAINERS | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/MAINTAINERS b/MAINTAINERS index 72b9654f764c..98cf4476d135 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20097,7 +20097,7 @@ M: Chris Zankel M: Max Filippov L: linux-xtensa@linux-xtensa.org S: Maintained -T: git git://github.com/czankel/xtensa-linux.git +T: git https://github.com/jcmvbkbc/linux-xtensa.git F: arch/xtensa/ F: drivers/irqchip/irq-xtensa-* From b8c4f4db24368fb6ba6283b9c3a67da04db22751 Mon Sep 17 00:00:00 2001 From: Lukas Bulwahn Date: Thu, 29 Sep 2022 12:15:15 +0200 Subject: [PATCH 2/3] xtensa: update config files Clean up config files by: - removing configs that were deleted in the past - removing configs not in tree and without recently pending patches - adding new configs that are replacements for old configs in the file For some detailed information, see Link. Link: https://lore.kernel.org/kernel-janitors/20220929090645.1389-1-lukas.bulwahn@gmail.com/ Signed-off-by: Lukas Bulwahn Message-Id: <20220929101515.354-1-lukas.bulwahn@gmail.com> Signed-off-by: Max Filippov --- arch/xtensa/configs/audio_kc705_defconfig | 1 - arch/xtensa/configs/cadence_csp_defconfig | 4 ---- arch/xtensa/configs/generic_kc705_defconfig | 1 - arch/xtensa/configs/nommu_kc705_defconfig | 1 - arch/xtensa/configs/smp_lx200_defconfig | 1 - arch/xtensa/configs/xip_kc705_defconfig | 1 - 6 files changed, 9 deletions(-) diff --git a/arch/xtensa/configs/audio_kc705_defconfig b/arch/xtensa/configs/audio_kc705_defconfig index 3be62da8089b..f09bbd6ea0a2 100644 --- a/arch/xtensa/configs/audio_kc705_defconfig +++ b/arch/xtensa/configs/audio_kc705_defconfig @@ -125,7 +125,6 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_LOCKUP_DETECTOR=y # CONFIG_SCHED_DEBUG is not set CONFIG_SCHEDSTATS=y -CONFIG_TIMER_STATS=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y diff --git a/arch/xtensa/configs/cadence_csp_defconfig b/arch/xtensa/configs/cadence_csp_defconfig index fc240737b14d..a5e029bca7cc 100644 --- a/arch/xtensa/configs/cadence_csp_defconfig +++ b/arch/xtensa/configs/cadence_csp_defconfig @@ -48,9 +48,6 @@ CONFIG_IP_PNP=y CONFIG_IP_PNP_DHCP=y CONFIG_IP_PNP_BOOTP=y CONFIG_IP_PNP_RARP=y -# CONFIG_INET_XFRM_MODE_TRANSPORT is not set -# CONFIG_INET_XFRM_MODE_TUNNEL is not set -# CONFIG_INET_XFRM_MODE_BEET is not set # CONFIG_INET_DIAG is not set # CONFIG_IPV6 is not set # CONFIG_WIRELESS is not set @@ -105,7 +102,6 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_LOCKUP_DETECTOR=y # CONFIG_SCHED_DEBUG is not set CONFIG_SCHEDSTATS=y -CONFIG_TIMER_STATS=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_PROVE_LOCKING=y CONFIG_DEBUG_ATOMIC_SLEEP=y diff --git a/arch/xtensa/configs/generic_kc705_defconfig b/arch/xtensa/configs/generic_kc705_defconfig index e9d6b6f6eca1..45fb181eaebd 100644 --- a/arch/xtensa/configs/generic_kc705_defconfig +++ b/arch/xtensa/configs/generic_kc705_defconfig @@ -112,7 +112,6 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_LOCKUP_DETECTOR=y # CONFIG_SCHED_DEBUG is not set CONFIG_SCHEDSTATS=y -CONFIG_TIMER_STATS=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y diff --git a/arch/xtensa/configs/nommu_kc705_defconfig b/arch/xtensa/configs/nommu_kc705_defconfig index fcb620ef3799..c97c856076b0 100644 --- a/arch/xtensa/configs/nommu_kc705_defconfig +++ b/arch/xtensa/configs/nommu_kc705_defconfig @@ -113,7 +113,6 @@ CONFIG_DEBUG_NOMMU_REGIONS=y CONFIG_DEBUG_SHIRQ=y CONFIG_LOCKUP_DETECTOR=y CONFIG_SCHEDSTATS=y -CONFIG_TIMER_STATS=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y diff --git a/arch/xtensa/configs/smp_lx200_defconfig b/arch/xtensa/configs/smp_lx200_defconfig index a47c85638ec1..d46459a67031 100644 --- a/arch/xtensa/configs/smp_lx200_defconfig +++ b/arch/xtensa/configs/smp_lx200_defconfig @@ -116,7 +116,6 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_VM=y CONFIG_LOCKUP_DETECTOR=y CONFIG_SCHEDSTATS=y -CONFIG_TIMER_STATS=y CONFIG_DEBUG_RT_MUTEXES=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig index 062148e17135..f8492fe1223a 100644 --- a/arch/xtensa/configs/xip_kc705_defconfig +++ b/arch/xtensa/configs/xip_kc705_defconfig @@ -55,7 +55,6 @@ CONFIG_SCSI=y CONFIG_BLK_DEV_SD=y CONFIG_NETDEVICES=y # CONFIG_NET_VENDOR_ARC is not set -# CONFIG_NET_VENDOR_AURORA is not set # CONFIG_NET_VENDOR_BROADCOM is not set # CONFIG_NET_VENDOR_INTEL is not set # CONFIG_NET_VENDOR_MARVELL is not set From 8939c58d68f97ce530f02d46c9f2b56c3ec88399 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 5 Dec 2022 13:19:21 -0800 Subject: [PATCH 3/3] xtensa: add __umulsidi3 helper xtensa gcc-13 has changed multiplication handling and may now use __umulsidi3 helper where it used to use __muldi3. As a result building the kernel with the new gcc may fail with the following error: linux/init/main.c:1287: undefined reference to `__umulsidi3' Fix the build by providing __umulsidi3 implementation for xtensa. Cc: stable@vger.kernel.org # 5.18+ Signed-off-by: Max Filippov --- arch/xtensa/kernel/xtensa_ksyms.c | 2 + arch/xtensa/lib/Makefile | 2 +- arch/xtensa/lib/umulsidi3.S | 230 ++++++++++++++++++++++++++++++ 3 files changed, 233 insertions(+), 1 deletion(-) create mode 100644 arch/xtensa/lib/umulsidi3.S diff --git a/arch/xtensa/kernel/xtensa_ksyms.c b/arch/xtensa/kernel/xtensa_ksyms.c index b0bc8897c924..2a31b1ab0c9f 100644 --- a/arch/xtensa/kernel/xtensa_ksyms.c +++ b/arch/xtensa/kernel/xtensa_ksyms.c @@ -62,6 +62,7 @@ extern int __modsi3(int, int); extern int __mulsi3(int, int); extern unsigned int __udivsi3(unsigned int, unsigned int); extern unsigned int __umodsi3(unsigned int, unsigned int); +extern unsigned long long __umulsidi3(unsigned int, unsigned int); EXPORT_SYMBOL(__ashldi3); EXPORT_SYMBOL(__ashrdi3); @@ -71,6 +72,7 @@ EXPORT_SYMBOL(__modsi3); EXPORT_SYMBOL(__mulsi3); EXPORT_SYMBOL(__udivsi3); EXPORT_SYMBOL(__umodsi3); +EXPORT_SYMBOL(__umulsidi3); unsigned int __sync_fetch_and_and_4(volatile void *p, unsigned int v) { diff --git a/arch/xtensa/lib/Makefile b/arch/xtensa/lib/Makefile index d4e9c397e3fd..7ecef0519a27 100644 --- a/arch/xtensa/lib/Makefile +++ b/arch/xtensa/lib/Makefile @@ -5,7 +5,7 @@ lib-y += memcopy.o memset.o checksum.o \ ashldi3.o ashrdi3.o lshrdi3.o \ - divsi3.o udivsi3.o modsi3.o umodsi3.o mulsi3.o \ + divsi3.o udivsi3.o modsi3.o umodsi3.o mulsi3.o umulsidi3.o \ usercopy.o strncpy_user.o strnlen_user.o lib-$(CONFIG_PCI) += pci-auto.o lib-$(CONFIG_KCSAN) += kcsan-stubs.o diff --git a/arch/xtensa/lib/umulsidi3.S b/arch/xtensa/lib/umulsidi3.S new file mode 100644 index 000000000000..136081647942 --- /dev/null +++ b/arch/xtensa/lib/umulsidi3.S @@ -0,0 +1,230 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */ +#include +#include +#include + +#if !XCHAL_HAVE_MUL16 && !XCHAL_HAVE_MUL32 && !XCHAL_HAVE_MAC16 +#define XCHAL_NO_MUL 1 +#endif + +ENTRY(__umulsidi3) + +#ifdef __XTENSA_CALL0_ABI__ + abi_entry(32) + s32i a12, sp, 16 + s32i a13, sp, 20 + s32i a14, sp, 24 + s32i a15, sp, 28 +#elif XCHAL_NO_MUL + /* This is not really a leaf function; allocate enough stack space + to allow CALL12s to a helper function. */ + abi_entry(32) +#else + abi_entry_default +#endif + +#ifdef __XTENSA_EB__ +#define wh a2 +#define wl a3 +#else +#define wh a3 +#define wl a2 +#endif /* __XTENSA_EB__ */ + + /* This code is taken from the mulsf3 routine in ieee754-sf.S. + See more comments there. */ + +#if XCHAL_HAVE_MUL32_HIGH + mull a6, a2, a3 + muluh wh, a2, a3 + mov wl, a6 + +#else /* ! MUL32_HIGH */ + +#if defined(__XTENSA_CALL0_ABI__) && XCHAL_NO_MUL + /* a0 and a8 will be clobbered by calling the multiply function + but a8 is not used here and need not be saved. */ + s32i a0, sp, 0 +#endif + +#if XCHAL_HAVE_MUL16 || XCHAL_HAVE_MUL32 + +#define a2h a4 +#define a3h a5 + + /* Get the high halves of the inputs into registers. */ + srli a2h, a2, 16 + srli a3h, a3, 16 + +#define a2l a2 +#define a3l a3 + +#if XCHAL_HAVE_MUL32 && !XCHAL_HAVE_MUL16 + /* Clear the high halves of the inputs. This does not matter + for MUL16 because the high bits are ignored. */ + extui a2, a2, 0, 16 + extui a3, a3, 0, 16 +#endif +#endif /* MUL16 || MUL32 */ + + +#if XCHAL_HAVE_MUL16 + +#define do_mul(dst, xreg, xhalf, yreg, yhalf) \ + mul16u dst, xreg ## xhalf, yreg ## yhalf + +#elif XCHAL_HAVE_MUL32 + +#define do_mul(dst, xreg, xhalf, yreg, yhalf) \ + mull dst, xreg ## xhalf, yreg ## yhalf + +#elif XCHAL_HAVE_MAC16 + +/* The preprocessor insists on inserting a space when concatenating after + a period in the definition of do_mul below. These macros are a workaround + using underscores instead of periods when doing the concatenation. */ +#define umul_aa_ll umul.aa.ll +#define umul_aa_lh umul.aa.lh +#define umul_aa_hl umul.aa.hl +#define umul_aa_hh umul.aa.hh + +#define do_mul(dst, xreg, xhalf, yreg, yhalf) \ + umul_aa_ ## xhalf ## yhalf xreg, yreg; \ + rsr dst, ACCLO + +#else /* no multiply hardware */ + +#define set_arg_l(dst, src) \ + extui dst, src, 0, 16 +#define set_arg_h(dst, src) \ + srli dst, src, 16 + +#ifdef __XTENSA_CALL0_ABI__ +#define do_mul(dst, xreg, xhalf, yreg, yhalf) \ + set_arg_ ## xhalf (a13, xreg); \ + set_arg_ ## yhalf (a14, yreg); \ + call0 .Lmul_mulsi3; \ + mov dst, a12 +#else +#define do_mul(dst, xreg, xhalf, yreg, yhalf) \ + set_arg_ ## xhalf (a14, xreg); \ + set_arg_ ## yhalf (a15, yreg); \ + call12 .Lmul_mulsi3; \ + mov dst, a14 +#endif /* __XTENSA_CALL0_ABI__ */ + +#endif /* no multiply hardware */ + + /* Add pp1 and pp2 into a6 with carry-out in a9. */ + do_mul(a6, a2, l, a3, h) /* pp 1 */ + do_mul(a11, a2, h, a3, l) /* pp 2 */ + movi a9, 0 + add a6, a6, a11 + bgeu a6, a11, 1f + addi a9, a9, 1 +1: + /* Shift the high half of a9/a6 into position in a9. Note that + this value can be safely incremented without any carry-outs. */ + ssai 16 + src a9, a9, a6 + + /* Compute the low word into a6. */ + do_mul(a11, a2, l, a3, l) /* pp 0 */ + sll a6, a6 + add a6, a6, a11 + bgeu a6, a11, 1f + addi a9, a9, 1 +1: + /* Compute the high word into wh. */ + do_mul(wh, a2, h, a3, h) /* pp 3 */ + add wh, wh, a9 + mov wl, a6 + +#endif /* !MUL32_HIGH */ + +#if defined(__XTENSA_CALL0_ABI__) && XCHAL_NO_MUL + /* Restore the original return address. */ + l32i a0, sp, 0 +#endif +#ifdef __XTENSA_CALL0_ABI__ + l32i a12, sp, 16 + l32i a13, sp, 20 + l32i a14, sp, 24 + l32i a15, sp, 28 + abi_ret(32) +#else + abi_ret_default +#endif + +#if XCHAL_NO_MUL + + .macro do_addx2 dst, as, at, tmp +#if XCHAL_HAVE_ADDX + addx2 \dst, \as, \at +#else + slli \tmp, \as, 1 + add \dst, \tmp, \at +#endif + .endm + + .macro do_addx4 dst, as, at, tmp +#if XCHAL_HAVE_ADDX + addx4 \dst, \as, \at +#else + slli \tmp, \as, 2 + add \dst, \tmp, \at +#endif + .endm + + .macro do_addx8 dst, as, at, tmp +#if XCHAL_HAVE_ADDX + addx8 \dst, \as, \at +#else + slli \tmp, \as, 3 + add \dst, \tmp, \at +#endif + .endm + + /* For Xtensa processors with no multiply hardware, this simplified + version of _mulsi3 is used for multiplying 16-bit chunks of + the floating-point mantissas. When using CALL0, this function + uses a custom ABI: the inputs are passed in a13 and a14, the + result is returned in a12, and a8 and a15 are clobbered. */ + .align 4 +.Lmul_mulsi3: + abi_entry_default + + .macro mul_mulsi3_body dst, src1, src2, tmp1, tmp2 + movi \dst, 0 +1: add \tmp1, \src2, \dst + extui \tmp2, \src1, 0, 1 + movnez \dst, \tmp1, \tmp2 + + do_addx2 \tmp1, \src2, \dst, \tmp1 + extui \tmp2, \src1, 1, 1 + movnez \dst, \tmp1, \tmp2 + + do_addx4 \tmp1, \src2, \dst, \tmp1 + extui \tmp2, \src1, 2, 1 + movnez \dst, \tmp1, \tmp2 + + do_addx8 \tmp1, \src2, \dst, \tmp1 + extui \tmp2, \src1, 3, 1 + movnez \dst, \tmp1, \tmp2 + + srli \src1, \src1, 4 + slli \src2, \src2, 4 + bnez \src1, 1b + .endm + +#ifdef __XTENSA_CALL0_ABI__ + mul_mulsi3_body a12, a13, a14, a15, a8 +#else + /* The result will be written into a2, so save that argument in a4. */ + mov a4, a2 + mul_mulsi3_body a2, a4, a3, a5, a6 +#endif + abi_ret_default +#endif /* XCHAL_NO_MUL */ + +ENDPROC(__umulsidi3)