From: Srinath Parvathaneni <Srinath.Parvathaneni@arm.com>
To: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Cc: Richard Earnshaw <Richard.Earnshaw@arm.com>
Subject: RE: [GCC][PATCH v2] arm: Add support for Arm Cortex-M85 CPU.
Date: Fri, 12 Aug 2022 17:20:47 +0000 [thread overview]
Message-ID: <VE1PR08MB4893FD0B7B61855939F8C0E79B679@VE1PR08MB4893.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <def1d46d-1e84-0283-cfa1-ad8657240e12@foss.arm.com>
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Hi,
This patch adds the -mcpu support for the Arm Cortex-M85 CPU which is an
Armv8.1-M Mainline CPU supporting MVE and PACBTI by default.
-mpcu=cortex-m85 switch by default matches to -march=armv8.1-m.main+pacbti+mve.fp+fp.dp.
Also following options are provided to disable default features.
+nomve.fp (disables MVE Floating point)
+nomve (disables MVE Integer and MVE Floating point)
+nodsp (disables dsp, MVE Integer and MVE Floating point)
+nopacbti (disables pacbti)
+nofp (disables floating point and MVE floating point)
Regression tested on arm-none-eabi and bootstrapped on arm-none-linux-gnueabihf.
Ok for master?
Regards,
Srinath.
gcc/ChangeLog:
2022-08-12 Srinath Parvathaneni <srinath.parvathaneni@arm.com>
* config/arm/arm-cpus.in (cortex-m85): Define new CPU.
* config/arm/arm-tables.opt: Regenerate.
* config/arm/arm-tune.md: Likewise.
* doc/invoke.texi (Arm Options): Document -mcpu=cortex-m85.
* (-mfix-cmse-cve-2021-35465): Likewise.
gcc/testsuite/ChangeLog:
2022-08-12 Srinath Parvathaneni <srinath.parvathaneni@arm.com>
* gcc.target/arm/multilib.exp: Add tests for cortex-m85.
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diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 9502a34fa974744f02ded4f32c03de6169950120..a6f364309f8728d6d2264b4e60feb75d51b87b64 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -1643,6 +1643,21 @@ begin cpu cortex-m55
vendor 41
end cpu cortex-m55
+begin cpu cortex-m85
+ cname cortexm85
+ tune flags LDSCHED
+ architecture armv8.1-m.main+pacbti+mve.fp+fp.dp
+ option nopacbti remove pacbti
+ option nomve.fp remove mve_float
+ option nomve remove mve mve_float
+ option nofp remove ALL_FP mve_float
+ option nodsp remove MVE mve_float
+ isa quirk_no_asmcpu quirk_vlldm
+ costs v7m
+ part 0xd23
+ vendor 41
+end cpu cortex-m85
+
# V8 R-profile implementations.
begin cpu cortex-r52
cname cortexr52
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index ef0cc5ef0c87ce37958fc0ac9b1623078b890187..54f87da7852b3e495da9fd08106d9f6bd7c99716 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -282,6 +282,9 @@ Enum(processor_type) String(cortex-m35p) Value( TARGET_CPU_cortexm35p)
EnumValue
Enum(processor_type) String(cortex-m55) Value( TARGET_CPU_cortexm55)
+EnumValue
+Enum(processor_type) String(cortex-m85) Value( TARGET_CPU_cortexm85)
+
EnumValue
Enum(processor_type) String(cortex-r52) Value( TARGET_CPU_cortexr52)
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index 3422553604245035089e4f52b3feb9db4c51b2b5..27cafe9b4caf9270cb5f537c988d57715495a207 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -49,6 +49,6 @@
cortexa710,cortexx1,neoversen1,
cortexa75cortexa55,cortexa76cortexa55,neoversev1,
neoversen2,cortexm23,cortexm33,
- cortexm35p,cortexm55,cortexr52,
+ cortexm35p,cortexm55,cortexm85,cortexr52,
cortexr52plus"
(const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 2ac082eb9c5f1572fd3e6d83b348104dc9114e78..199b0a531409fd2124460566b93381bfa4e1dc1e 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -21079,7 +21079,7 @@ Permissible names are: @samp{arm7tdmi}, @samp{arm7tdmi-s}, @samp{arm710t},
@samp{cortex-r7}, @samp{cortex-r8}, @samp{cortex-r52}, @samp{cortex-r52plus},
@samp{cortex-m0}, @samp{cortex-m0plus}, @samp{cortex-m1}, @samp{cortex-m3},
@samp{cortex-m4}, @samp{cortex-m7}, @samp{cortex-m23}, @samp{cortex-m33},
-@samp{cortex-m35p}, @samp{cortex-m55}, @samp{cortex-x1},
+@samp{cortex-m35p}, @samp{cortex-m55}, @samp{cortex-m85}, @samp{cortex-x1},
@samp{cortex-m1.small-multiply}, @samp{cortex-m0.small-multiply},
@samp{cortex-m0plus.small-multiply}, @samp{exynos-m1}, @samp{marvell-pj4},
@samp{neoverse-n1}, @samp{neoverse-n2}, @samp{neoverse-v1}, @samp{xscale},
@@ -21143,25 +21143,30 @@ The following extension options are common to the listed CPUs:
@table @samp
@item +nodsp
-Disable the DSP instructions on @samp{cortex-m33}, @samp{cortex-m35p}
-and @samp{cortex-m55}. Also disable the M-Profile Vector Extension (MVE)
-integer and single precision floating-point instructions on @samp{cortex-m55}.
+Disable the DSP instructions on @samp{cortex-m33}, @samp{cortex-m35p},
+@samp{cortex-m55} and @samp{cortex-m85}. Also disable the M-Profile Vector
+Extension (MVE) integer and single precision floating-point instructions on
+@samp{cortex-m55} and @samp{cortex-m85}.
+
+@item +nopacbti
+Disable the Pointer Authentication and Branch Target Identification Extension
+on @samp{cortex-m85}.
@item +nomve
Disable the M-Profile Vector Extension (MVE) integer and single precision
-floating-point instructions on @samp{cortex-m55}.
+floating-point instructions on @samp{cortex-m55} and @samp{cortex-m85}.
@item +nomve.fp
Disable the M-Profile Vector Extension (MVE) single precision floating-point
-instructions on @samp{cortex-m55}.
+instructions on @samp{cortex-m55} and @samp{cortex-m85}.
@item +nofp
Disables the floating-point instructions on @samp{arm9e},
@samp{arm946e-s}, @samp{arm966e-s}, @samp{arm968e-s}, @samp{arm10e},
@samp{arm1020e}, @samp{arm1022e}, @samp{arm926ej-s},
@samp{arm1026ej-s}, @samp{cortex-r5}, @samp{cortex-r7}, @samp{cortex-r8},
-@samp{cortex-m4}, @samp{cortex-m7}, @samp{cortex-m33}, @samp{cortex-m35p}
-and @samp{cortex-m55}.
+@samp{cortex-m4}, @samp{cortex-m7}, @samp{cortex-m33}, @samp{cortex-m35p},
+@samp{cortex-m55} and @samp{cortex-m85}.
Disables the floating-point and SIMD instructions on
@samp{generic-armv7-a}, @samp{cortex-a5}, @samp{cortex-a7},
@samp{cortex-a8}, @samp{cortex-a9}, @samp{cortex-a12},
@@ -21501,8 +21506,9 @@ Development Tools Engineering Specification", which can be found on
Mitigate against a potential security issue with the @code{VLLDM} instruction
in some M-profile devices when using CMSE (CVE-2021-365465). This option is
enabled by default when the option @option{-mcpu=} is used with
-@code{cortex-m33}, @code{cortex-m35p} or @code{cortex-m55}. The option
-@option{-mno-fix-cmse-cve-2021-35465} can be used to disable the mitigation.
+@code{cortex-m33}, @code{cortex-m35p}, @code{cortex-m55} or @code{cortex-m85}.
+The option @option{-mno-fix-cmse-cve-2021-35465} can be used to disable the
+mitigation.
@item -mstack-protector-guard=@var{guard}
@itemx -mstack-protector-guard-offset=@var{offset}
diff --git a/gcc/testsuite/gcc.target/arm/multilib.exp b/gcc/testsuite/gcc.target/arm/multilib.exp
index 52e67446453fb420007cf9481cb668e9a3e4f07f..6bbd0de6866edde58b6096640493f97386cabe72 100644
--- a/gcc/testsuite/gcc.target/arm/multilib.exp
+++ b/gcc/testsuite/gcc.target/arm/multilib.exp
@@ -518,6 +518,11 @@ if {[multilib_config "rmprofile"] } {
{-mcpu=cortex-m23 -mfpu=fpv5-d16 -mfloat-abi=soft} "thumb/v8-m.base/nofp"
{-mcpu=cortex-m33 -mfpu=fpv5-d16 -mfloat-abi=soft} "thumb/v8-m.main/nofp"
{-mcpu=cortex-m7+nofp.dp -mfpu=fpv5-d16 -mfloat-abi=soft} "thumb/v7e-m/nofp"
+ {-mcpu=cortex-m85+nopacbti -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
+ {-mcpu=cortex-m85+nopacbti+nofp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
+ {-mcpu=cortex-m85+nopacbti+nomve -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
+ {-mcpu=cortex-m85+nopacbti+nodsp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
+ {-mcpu=cortex-m85+nopacbti+nomve.fp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
{-mcpu=cortex-m4 -mfpu=auto -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
{-mcpu=cortex-m7 -mfpu=auto -mfloat-abi=hard} "thumb/v7e-m+dp/hard"
{-mcpu=cortex-m33 -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
@@ -543,6 +548,15 @@ if {[multilib_config "rmprofile"] } {
{-mcpu=cortex-m7 -mfpu=fpv5-d16 -mfloat-abi=hard} "thumb/v7e-m+dp/hard"
{-mcpu=cortex-m33 -mfpu=fpv5-d16 -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
{-mcpu=cortex-m7+nofp.dp -mfpu=fpv5-d16 -mfloat-abi=hard} "thumb/v7e-m+dp/hard"
+ {-mcpu=cortex-m85+nopacbti -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
+ {-mcpu=cortex-m85+nopacbti+nomve -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
+ {-mcpu=cortex-m85+nopacbti+nodsp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
+ {-mcpu=cortex-m85+nopacbti+nofp -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+mve/hard"
+ {-mcpu=cortex-m85+nopacbti+nomve.fp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
+ {-mcpu=cortex-m85 -mbranch-protection=standard -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/hard"
+ {-mcpu=cortex-m85+nomve.fp -mbranch-protection=standard -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/hard"
+ {-mcpu=cortex-m85+nomve -mbranch-protection=standard -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/hard"
+ {-mcpu=cortex-m85+nodsp -mbranch-protection=standard -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/hard"
{-mcpu=cortex-m0 -mfpu=auto -mfloat-abi=softfp} "thumb/v6-m/nofp"
{-mcpu=cortex-m1 -mfpu=auto -mfloat-abi=softfp} "thumb/v6-m/nofp"
{-mcpu=cortex-m3 -mfpu=auto -mfloat-abi=softfp} "thumb/v7-m/nofp"
@@ -592,6 +606,15 @@ if {[multilib_config "rmprofile"] } {
{-mcpu=cortex-m23 -mfpu=fpv5-d16 -mfloat-abi=softfp} "thumb/v8-m.base/nofp"
{-mcpu=cortex-m33 -mfpu=fpv5-d16 -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
{-mcpu=cortex-m7+nofp.dp -mfpu=fpv5-d16 -mfloat-abi=softfp} "thumb/v7e-m+dp/softfp"
+ {-mcpu=cortex-m85+nopacbti+nofp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main/nofp"
+ {-mcpu=cortex-m85+nopacbti -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
+ {-mcpu=cortex-m85+nopacbti+nomve -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
+ {-mcpu=cortex-m85+nopacbti+nodsp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
+ {-mcpu=cortex-m85+nopacbti+nomve.fp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
+ {-mcpu=cortex-m85 -mbranch-protection=standard -mfpu=auto -mfloat-abi=softfp} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/softfp"
+ {-mcpu=cortex-m85+nomve.fp -mbranch-protection=standard -mfpu=auto -mfloat-abi=softfp} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/softfp"
+ {-mcpu=cortex-m85+nomve -mbranch-protection=standard -mfpu=auto -mfloat-abi=softfp} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/softfp"
+ {-mcpu=cortex-m85+nodsp -mbranch-protection=standard -mfpu=auto -mfloat-abi=softfp} "thumb/v8.1-m.main+pacbti+dp/mbranch-protection/softfp"
{-march=armv6-m -mfpu=auto -mfloat-abi=soft} "thumb/v6-m/nofp"
{-march=armv7-m -mfpu=auto -mfloat-abi=soft} "thumb/v7-m/nofp"
{-march=armv7e-m -mfpu=auto -mfloat-abi=soft} "thumb/v7e-m/nofp"
next prev parent reply other threads:[~2022-08-12 17:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-05 15:20 [GCC][PATCH] " Srinath Parvathaneni
2022-08-05 15:45 ` Richard Earnshaw
2022-08-12 17:20 ` Srinath Parvathaneni [this message]
2022-08-18 14:55 ` [GCC][PATCH v2] " Richard Earnshaw
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