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Re: [XEN PATCH v7 3/4] x86/include: address violations of MISRA C:2012 Rule 7.2
On 29/09/23 00:58, Stefano Stabellini wrote:
On Thu, 28 Sep 2023, Simone Ballarin wrote:
The xen sources contains violations of MISRA C:2012 Rule 7.2 whose
headline states:
"A 'u' or 'U' suffix shall be applied to all integer constants
that are represented in an unsigned type".
Add the 'U' suffix to integers literals with unsigned type.
Use _AC() for macro costants that are used also in assembly files.
For the sake of uniformity, the following changes are made:
- add the 'U' suffix to macros in 'pci.h'
- use _AC() for macros near 'X86_CR0_PG'
Signed-off-by: Gianluca Luparini <gianluca.luparini@xxxxxxxxxxx>
Signed-off-by: Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
---
Changes in v7:
- switch order of Signed-off-by tags
- change tag from x86/arm to x86/include
Changes in v6:
- new patch obtained by splitting ASM related changes from
"xen/x86: address violations of MISRA C:2012 Rule 7.2 (v5)"
- use UL suffix for X86_CR0_* macros
---
xen/arch/x86/include/asm/apicdef.h | 2 +-
xen/arch/x86/include/asm/config.h | 2 +-
xen/arch/x86/include/asm/hpet.h | 2 +-
xen/arch/x86/include/asm/msi.h | 2 +-
xen/arch/x86/include/asm/msr-index.h | 182 +++++++++++++--------------
xen/arch/x86/include/asm/pci.h | 8 +-
xen/arch/x86/include/asm/x86-defns.h | 22 ++--
7 files changed, 110 insertions(+), 110 deletions(-)
diff --git a/xen/arch/x86/include/asm/apicdef.h
b/xen/arch/x86/include/asm/apicdef.h
index a261436993..8d1b0087d4 100644
--- a/xen/arch/x86/include/asm/apicdef.h
+++ b/xen/arch/x86/include/asm/apicdef.h
@@ -8,7 +8,7 @@
* Ingo Molnar <mingo@xxxxxxxxxx>, 1999, 2000
*/
-#define APIC_DEFAULT_PHYS_BASE 0xfee00000
+#define APIC_DEFAULT_PHYS_BASE 0xfee00000U
#define APIC_ID 0x20
#define APIC_ID_MASK (0xFFu<<24)
diff --git a/xen/arch/x86/include/asm/config.h
b/xen/arch/x86/include/asm/config.h
index fbc4bb3416..bbced338be 100644
--- a/xen/arch/x86/include/asm/config.h
+++ b/xen/arch/x86/include/asm/config.h
@@ -257,7 +257,7 @@ extern unsigned char boot_edid_info[128];
#endif /* CONFIG_PV32 */
#define MACH2PHYS_COMPAT_VIRT_START HYPERVISOR_COMPAT_VIRT_START
-#define MACH2PHYS_COMPAT_VIRT_END 0xFFE00000
+#define MACH2PHYS_COMPAT_VIRT_END 0xFFE00000U
#define MACH2PHYS_COMPAT_NR_ENTRIES(d) \
((MACH2PHYS_COMPAT_VIRT_END-MACH2PHYS_COMPAT_VIRT_START(d))>>2)
diff --git a/xen/arch/x86/include/asm/hpet.h b/xen/arch/x86/include/asm/hpet.h
index 9919f74730..c5e8e9c8db 100644
--- a/xen/arch/x86/include/asm/hpet.h
+++ b/xen/arch/x86/include/asm/hpet.h
@@ -41,7 +41,7 @@
#define HPET_TN_ROUTE 0x3e00
#define HPET_TN_FSB 0x4000
#define HPET_TN_FSB_CAP 0x8000
-#define HPET_TN_RESERVED 0xffff0081
+#define HPET_TN_RESERVED 0xffff0081U
#define HPET_TN_INT_ROUTE_CAP (0xffffffffULL << 32)
diff --git a/xen/arch/x86/include/asm/msi.h b/xen/arch/x86/include/asm/msi.h
index a53ade95c9..d89723d009 100644
--- a/xen/arch/x86/include/asm/msi.h
+++ b/xen/arch/x86/include/asm/msi.h
@@ -37,7 +37,7 @@
*/
#define MSI_ADDR_BASE_HI 0
-#define MSI_ADDR_BASE_LO 0xfee00000
+#define MSI_ADDR_BASE_LO 0xfee00000U
#define MSI_ADDR_BASE_MASK (~0xfffff)
#define MSI_ADDR_HEADER MSI_ADDR_BASE_LO
diff --git a/xen/arch/x86/include/asm/msr-index.h b/xen/arch/x86/include/asm/msr-index.h
index 11ffed543a..718f8f860d 100644
--- a/xen/arch/x86/include/asm/msr-index.h
+++ b/xen/arch/x86/include/asm/msr-index.h
@@ -22,7 +22,7 @@
#define APIC_BASE_BSP (_AC(1, ULL) << 8)
#define APIC_BASE_EXTD (_AC(1, ULL) << 10)
#define APIC_BASE_ENABLE (_AC(1, ULL) << 11)
-#define APIC_BASE_ADDR_MASK 0x000ffffffffff000ULL
+#define APIC_BASE_ADDR_MASK _AC(0x000ffffffffff000, ULL)
This is not used by assembly code?
#define MSR_TEST_CTRL 0x00000033
#define TEST_CTRL_SPLITLOCK_DETECT (_AC(1, ULL) << 29)
@@ -30,7 +30,7 @@
#define MSR_INTEL_CORE_THREAD_COUNT 0x00000035
#define MSR_CTC_THREAD_MASK 0x0000ffff
-#define MSR_CTC_CORE_MASK 0xffff0000
+#define MSR_CTC_CORE_MASK _AC(0xffff0000, U)
Also this one is not?
#define MSR_SPEC_CTRL 0x00000048
#define SPEC_CTRL_IBRS (_AC(1, ULL) << 0)
@@ -186,7 +186,7 @@
#define MSR_UARCH_MISC_CTRL 0x00001b01
#define UARCH_CTRL_DOITM (_AC(1, ULL) << 0)
-#define MSR_EFER 0xc0000080 /* Extended Feature Enable Register */
+#define MSR_EFER _AC(0xc0000080, U) /* Extended
Feature Enable Register */
#define EFER_SCE (_AC(1, ULL) << 0) /* SYSCALL
Enable */
#define EFER_LME (_AC(1, ULL) << 8) /* Long Mode
Enable */
#define EFER_LMA (_AC(1, ULL) << 10) /* Long Mode
Active */
@@ -199,35 +199,35 @@
(EFER_SCE | EFER_LME | EFER_LMA | EFER_NXE | EFER_SVME | EFER_FFXSE | \
EFER_AIBRSE)
-#define MSR_STAR 0xc0000081 /* legacy mode SYSCALL target */
-#define MSR_LSTAR 0xc0000082 /* long mode SYSCALL
target */
-#define MSR_CSTAR 0xc0000083 /* compat mode SYSCALL
target */
-#define MSR_SYSCALL_MASK 0xc0000084 /* EFLAGS mask for
syscall */
-#define MSR_FS_BASE 0xc0000100 /* 64bit FS base */
-#define MSR_GS_BASE 0xc0000101 /* 64bit GS base */
-#define MSR_SHADOW_GS_BASE 0xc0000102 /* SwapGS GS shadow */
-#define MSR_TSC_AUX 0xc0000103 /* Auxiliary TSC */
+#define MSR_STAR _AC(0xc0000081, U) /* legacy mode
SYSCALL target */
+#define MSR_LSTAR _AC(0xc0000082, U) /* long mode
SYSCALL target */
+#define MSR_CSTAR _AC(0xc0000083, U) /* compat mode
SYSCALL target */
+#define MSR_SYSCALL_MASK _AC(0xc0000084, U) /* EFLAGS mask
for syscall */
+#define MSR_FS_BASE _AC(0xc0000100, U) /* 64bit FS
base */
+#define MSR_GS_BASE _AC(0xc0000101, U) /* 64bit GS
base */
+#define MSR_SHADOW_GS_BASE _AC(0xc0000102, U) /* SwapGS GS
shadow */
+#define MSR_TSC_AUX _AC(0xc0000103, U) /* Auxiliary
TSC */
None of these set seems to be used by assembly code
-#define MSR_K8_SYSCFG 0xc0010010
+#define MSR_K8_SYSCFG _AC(0xc0010010, U)
This one also is not?
#define SYSCFG_MTRR_FIX_DRAM_EN (_AC(1, ULL) << 18)
#define SYSCFG_MTRR_FIX_DRAM_MOD_EN (_AC(1, ULL) << 19)
#define SYSCFG_MTRR_VAR_DRAM_EN (_AC(1, ULL) << 20)
#define SYSCFG_MTRR_TOM2_EN (_AC(1, ULL) << 21)
#define SYSCFG_TOM2_FORCE_WB (_AC(1, ULL) << 22)
-#define MSR_K8_IORR_BASE0 0xc0010016
-#define MSR_K8_IORR_MASK0 0xc0010017
-#define MSR_K8_IORR_BASE1 0xc0010018
-#define MSR_K8_IORR_MASK1 0xc0010019
+#define MSR_K8_IORR_BASE0 _AC(0xc0010016, U)
+#define MSR_K8_IORR_MASK0 _AC(0xc0010017, U)
+#define MSR_K8_IORR_BASE1 _AC(0xc0010018, U)
+#define MSR_K8_IORR_MASK1 _AC(0xc0010019, U)
These ones are not?
-#define MSR_K8_TSEG_BASE 0xc0010112 /* AMD doc: SMMAddr */
-#define MSR_K8_TSEG_MASK 0xc0010113 /* AMD doc: SMMMask */
+#define MSR_K8_TSEG_BASE _AC(0xc0010112, U) /* AMD doc:
SMMAddr */
+#define MSR_K8_TSEG_MASK _AC(0xc0010113, U) /* AMD doc:
SMMMask */
These ones are not?
-#define MSR_K8_VM_CR 0xc0010114
+#define MSR_K8_VM_CR _AC(0xc0010114, U)
Also this one
#define VM_CR_INIT_REDIRECTION (_AC(1, ULL) << 1)
#define VM_CR_SVM_DISABLE (_AC(1, ULL) << 4)
-#define MSR_VIRT_SPEC_CTRL 0xc001011f /* Layout matches MSR_SPEC_CTRL */
+#define MSR_VIRT_SPEC_CTRL _AC(0xc001011f, U) /* Layout
matches MSR_SPEC_CTRL */
And this one.
What am I missing? Did you also add _AC to all the places where the
constants end up being used in asm inline? Because I don't think that
asm inline needs the _AC...
Initially I've used _AC only when strictly required, then I've received
the following comment
(https://lists.xenproject.org/archives/html/xen-devel/2023-08/msg02207.html):
I understand you use _AC() here because the constant is used in
assembly code. But I don't understand why you use it only here,
and not throughout at least the "modern" portion of the file. I
wonder what other x86 maintainers think about this.
#define MSR_AMD_CSTATE_CFG 0xc0010296
@@ -313,7 +313,7 @@
#define CMCI_EN (1UL<<30)
#define CMCI_THRESHOLD_MASK 0x7FFF
-#define MSR_AMD64_MC0_MASK 0xc0010044
+#define MSR_AMD64_MC0_MASK 0xc0010044U
#define MSR_IA32_MCx_CTL(x) (MSR_IA32_MC0_CTL + 4*(x))
#define MSR_IA32_MCx_STATUS(x) (MSR_IA32_MC0_STATUS + 4*(x))
@@ -345,82 +345,82 @@
/* K7/K8 MSRs. Not complete. See the architecture manual for a more
complete list. */
-#define MSR_K7_EVNTSEL0 0xc0010000
-#define MSR_K7_PERFCTR0 0xc0010004
-#define MSR_K7_EVNTSEL1 0xc0010001
-#define MSR_K7_PERFCTR1 0xc0010005
-#define MSR_K7_EVNTSEL2 0xc0010002
-#define MSR_K7_PERFCTR2 0xc0010006
-#define MSR_K7_EVNTSEL3 0xc0010003
-#define MSR_K7_PERFCTR3 0xc0010007
-#define MSR_K8_TOP_MEM1 0xc001001a
-#define MSR_K8_TOP_MEM2 0xc001001d
-
-#define MSR_K8_HWCR 0xc0010015
+#define MSR_K7_EVNTSEL0 0xc0010000U
+#define MSR_K7_PERFCTR0 0xc0010004U
+#define MSR_K7_EVNTSEL1 0xc0010001U
+#define MSR_K7_PERFCTR1 0xc0010005U
+#define MSR_K7_EVNTSEL2 0xc0010002U
+#define MSR_K7_PERFCTR2 0xc0010006U
+#define MSR_K7_EVNTSEL3 0xc0010003U
+#define MSR_K7_PERFCTR3 0xc0010007U
+#define MSR_K8_TOP_MEM1 0xc001001aU
+#define MSR_K8_TOP_MEM2 0xc001001dU
+
+#define MSR_K8_HWCR 0xc0010015U
#define K8_HWCR_TSC_FREQ_SEL (1ULL << 24)
#define K8_HWCR_CPUID_USER_DIS (1ULL << 35)
-#define MSR_K7_FID_VID_CTL 0xc0010041
-#define MSR_K7_FID_VID_STATUS 0xc0010042
-#define MSR_K8_PSTATE_LIMIT 0xc0010061
-#define MSR_K8_PSTATE_CTRL 0xc0010062
-#define MSR_K8_PSTATE_STATUS 0xc0010063
-#define MSR_K8_PSTATE0 0xc0010064
-#define MSR_K8_PSTATE1 0xc0010065
-#define MSR_K8_PSTATE2 0xc0010066
-#define MSR_K8_PSTATE3 0xc0010067
-#define MSR_K8_PSTATE4 0xc0010068
-#define MSR_K8_PSTATE5 0xc0010069
-#define MSR_K8_PSTATE6 0xc001006A
-#define MSR_K8_PSTATE7 0xc001006B
-#define MSR_K8_ENABLE_C1E 0xc0010055
-#define MSR_K8_VM_HSAVE_PA 0xc0010117
-
-#define MSR_AMD_FAM15H_EVNTSEL0 0xc0010200
-#define MSR_AMD_FAM15H_PERFCTR0 0xc0010201
-#define MSR_AMD_FAM15H_EVNTSEL1 0xc0010202
-#define MSR_AMD_FAM15H_PERFCTR1 0xc0010203
-#define MSR_AMD_FAM15H_EVNTSEL2 0xc0010204
-#define MSR_AMD_FAM15H_PERFCTR2 0xc0010205
-#define MSR_AMD_FAM15H_EVNTSEL3 0xc0010206
-#define MSR_AMD_FAM15H_PERFCTR3 0xc0010207
-#define MSR_AMD_FAM15H_EVNTSEL4 0xc0010208
-#define MSR_AMD_FAM15H_PERFCTR4 0xc0010209
-#define MSR_AMD_FAM15H_EVNTSEL5 0xc001020a
-#define MSR_AMD_FAM15H_PERFCTR5 0xc001020b
-
-#define MSR_AMD_L7S0_FEATURE_MASK 0xc0011002
-#define MSR_AMD_THRM_FEATURE_MASK 0xc0011003
-#define MSR_K8_FEATURE_MASK 0xc0011004
-#define MSR_K8_EXT_FEATURE_MASK 0xc0011005
+#define MSR_K7_FID_VID_CTL 0xc0010041U
+#define MSR_K7_FID_VID_STATUS 0xc0010042U
+#define MSR_K8_PSTATE_LIMIT 0xc0010061U
+#define MSR_K8_PSTATE_CTRL 0xc0010062U
+#define MSR_K8_PSTATE_STATUS 0xc0010063U
+#define MSR_K8_PSTATE0 0xc0010064U
+#define MSR_K8_PSTATE1 0xc0010065U
+#define MSR_K8_PSTATE2 0xc0010066U
+#define MSR_K8_PSTATE3 0xc0010067U
+#define MSR_K8_PSTATE4 0xc0010068U
+#define MSR_K8_PSTATE5 0xc0010069U
+#define MSR_K8_PSTATE6 0xc001006AU
+#define MSR_K8_PSTATE7 0xc001006BU
+#define MSR_K8_ENABLE_C1E 0xc0010055U
+#define MSR_K8_VM_HSAVE_PA 0xc0010117U
+
+#define MSR_AMD_FAM15H_EVNTSEL0 0xc0010200U
+#define MSR_AMD_FAM15H_PERFCTR0 0xc0010201U
+#define MSR_AMD_FAM15H_EVNTSEL1 0xc0010202U
+#define MSR_AMD_FAM15H_PERFCTR1 0xc0010203U
+#define MSR_AMD_FAM15H_EVNTSEL2 0xc0010204U
+#define MSR_AMD_FAM15H_PERFCTR2 0xc0010205U
+#define MSR_AMD_FAM15H_EVNTSEL3 0xc0010206U
+#define MSR_AMD_FAM15H_PERFCTR3 0xc0010207U
+#define MSR_AMD_FAM15H_EVNTSEL4 0xc0010208U
+#define MSR_AMD_FAM15H_PERFCTR4 0xc0010209U
+#define MSR_AMD_FAM15H_EVNTSEL5 0xc001020aU
+#define MSR_AMD_FAM15H_PERFCTR5 0xc001020bU
+
+#define MSR_AMD_L7S0_FEATURE_MASK 0xc0011002U
+#define MSR_AMD_THRM_FEATURE_MASK 0xc0011003U
+#define MSR_K8_FEATURE_MASK 0xc0011004U
+#define MSR_K8_EXT_FEATURE_MASK 0xc0011005U
/* AMD64 MSRs */
-#define MSR_AMD64_NB_CFG 0xc001001f
+#define MSR_AMD64_NB_CFG 0xc001001fU
#define AMD64_NB_CFG_CF8_EXT_ENABLE_BIT 46
-#define MSR_AMD64_LS_CFG 0xc0011020
-#define MSR_AMD64_IC_CFG 0xc0011021
-#define MSR_AMD64_DC_CFG 0xc0011022
-#define MSR_AMD64_DE_CFG 0xc0011029
+#define MSR_AMD64_LS_CFG 0xc0011020U
+#define MSR_AMD64_IC_CFG 0xc0011021U
+#define MSR_AMD64_DC_CFG 0xc0011022U
+#define MSR_AMD64_DE_CFG 0xc0011029U
#define AMD64_DE_CFG_LFENCE_SERIALISE (_AC(1, ULL) << 1)
-#define MSR_AMD64_EX_CFG 0xc001102c
-#define MSR_AMD64_DE_CFG2 0xc00110e3
+#define MSR_AMD64_EX_CFG 0xc001102cU
+#define MSR_AMD64_DE_CFG2 0xc00110e3U
-#define MSR_AMD64_DR0_ADDRESS_MASK 0xc0011027
-#define MSR_AMD64_DR1_ADDRESS_MASK 0xc0011019
-#define MSR_AMD64_DR2_ADDRESS_MASK 0xc001101a
-#define MSR_AMD64_DR3_ADDRESS_MASK 0xc001101b
+#define MSR_AMD64_DR0_ADDRESS_MASK 0xc0011027U
+#define MSR_AMD64_DR1_ADDRESS_MASK 0xc0011019U
+#define MSR_AMD64_DR2_ADDRESS_MASK 0xc001101aU
+#define MSR_AMD64_DR3_ADDRESS_MASK 0xc001101bU
/* AMD Family10h machine check MSRs */
-#define MSR_F10_MC4_MISC1 0xc0000408
-#define MSR_F10_MC4_MISC2 0xc0000409
-#define MSR_F10_MC4_MISC3 0xc000040A
+#define MSR_F10_MC4_MISC1 0xc0000408U
+#define MSR_F10_MC4_MISC2 0xc0000409U
+#define MSR_F10_MC4_MISC3 0xc000040AU
/* AMD Family10h Bus Unit MSRs */
-#define MSR_F10_BU_CFG 0xc0011023
-#define MSR_F10_BU_CFG2 0xc001102a
+#define MSR_F10_BU_CFG 0xc0011023U
+#define MSR_F10_BU_CFG2 0xc001102aU
/* Other AMD Fam10h MSRs */
-#define MSR_FAM10H_MMIO_CONF_BASE 0xc0010058
+#define MSR_FAM10H_MMIO_CONF_BASE 0xc0010058U
#define FAM10H_MMIO_CONF_ENABLE (1<<0)
#define FAM10H_MMIO_CONF_BUSRANGE_MASK 0xf
#define FAM10H_MMIO_CONF_BUSRANGE_SHIFT 2
@@ -429,22 +429,22 @@
/* AMD Microcode MSRs */
#define MSR_AMD_PATCHLEVEL 0x0000008b
-#define MSR_AMD_PATCHLOADER 0xc0010020
+#define MSR_AMD_PATCHLOADER 0xc0010020U
/* AMD TSC RATE MSR */
-#define MSR_AMD64_TSC_RATIO 0xc0000104
+#define MSR_AMD64_TSC_RATIO 0xc0000104U
/* AMD Lightweight Profiling MSRs */
-#define MSR_AMD64_LWP_CFG 0xc0000105
-#define MSR_AMD64_LWP_CBADDR 0xc0000106
+#define MSR_AMD64_LWP_CFG 0xc0000105U
+#define MSR_AMD64_LWP_CBADDR 0xc0000106U
/* AMD OS Visible Workaround MSRs */
-#define MSR_AMD_OSVW_ID_LENGTH 0xc0010140
-#define MSR_AMD_OSVW_STATUS 0xc0010141
+#define MSR_AMD_OSVW_ID_LENGTH 0xc0010140U
+#define MSR_AMD_OSVW_STATUS 0xc0010141U
/* AMD Protected Processor Inventory Number */
-#define MSR_AMD_PPIN_CTL 0xc00102f0
-#define MSR_AMD_PPIN 0xc00102f1
+#define MSR_AMD_PPIN_CTL 0xc00102f0U
+#define MSR_AMD_PPIN 0xc00102f1U
/* VIA Cyrix defined MSRs*/
#define MSR_VIA_FCR 0x00001107
diff --git a/xen/arch/x86/include/asm/pci.h b/xen/arch/x86/include/asm/pci.h
index f4a58c8acf..e1dd12eb19 100644
--- a/xen/arch/x86/include/asm/pci.h
+++ b/xen/arch/x86/include/asm/pci.h
@@ -3,10 +3,10 @@
#include <xen/mm.h>
-#define CF8_BDF(cf8) ( ((cf8) & 0x00ffff00) >> 8)
-#define CF8_ADDR_LO(cf8) ( (cf8) & 0x000000fc)
-#define CF8_ADDR_HI(cf8) ( ((cf8) & 0x0f000000) >> 16)
-#define CF8_ENABLED(cf8) (!!((cf8) & 0x80000000))
+#define CF8_BDF(cf8) ( ((cf8) & 0x00ffff00U) >> 8)
+#define CF8_ADDR_LO(cf8) ( (cf8) & 0x000000fcU)
+#define CF8_ADDR_HI(cf8) ( ((cf8) & 0x0f000000U) >> 16)
+#define CF8_ENABLED(cf8) (!!((cf8) & 0x80000000U))
#define IS_SNB_GFX(id) (id == 0x01068086 || id == 0x01168086 \
|| id == 0x01268086 || id == 0x01028086 \
diff --git a/xen/arch/x86/include/asm/x86-defns.h
b/xen/arch/x86/include/asm/x86-defns.h
index 5838631ef6..48d7a3b7af 100644
--- a/xen/arch/x86/include/asm/x86-defns.h
+++ b/xen/arch/x86/include/asm/x86-defns.h
@@ -30,17 +30,17 @@
/*
* Intel CPU flags in CR0
*/
-#define X86_CR0_PE 0x00000001 /* Enable Protected Mode (RW) */
-#define X86_CR0_MP 0x00000002 /* Monitor Coprocessor (RW) */
-#define X86_CR0_EM 0x00000004 /* Require FPU Emulation (RO) */
-#define X86_CR0_TS 0x00000008 /* Task Switched (RW) */
-#define X86_CR0_ET 0x00000010 /* Extension type (RO) */
-#define X86_CR0_NE 0x00000020 /* Numeric Error Reporting (RW) */
-#define X86_CR0_WP 0x00010000 /* Supervisor Write Protect (RW) */
-#define X86_CR0_AM 0x00040000 /* Alignment Checking (RW) */
-#define X86_CR0_NW 0x20000000 /* Not Write-Through (RW) */
-#define X86_CR0_CD 0x40000000 /* Cache Disable (RW) */
-#define X86_CR0_PG 0x80000000 /* Paging (RW) */
+#define X86_CR0_PE _AC(0x00000001, UL) /* Enable Protected Mode
(RW) */
+#define X86_CR0_MP _AC(0x00000002, UL) /* Monitor Coprocessor
(RW) */
+#define X86_CR0_EM _AC(0x00000004, UL) /* Require FPU Emulation
(RO) */
+#define X86_CR0_TS _AC(0x00000008, UL) /* Task Switched
(RW) */
+#define X86_CR0_ET _AC(0x00000010, UL) /* Extension type
(RO) */
+#define X86_CR0_NE _AC(0x00000020, UL) /* Numeric Error Reporting
(RW) */
+#define X86_CR0_WP _AC(0x00010000, UL) /* Supervisor Write
Protect (RW) */
+#define X86_CR0_AM _AC(0x00040000, UL) /* Alignment Checking
(RW) */
+#define X86_CR0_NW _AC(0x20000000, UL) /* Not Write-Through
(RW) */
+#define X86_CR0_CD _AC(0x40000000, UL) /* Cache Disable
(RW) */
+#define X86_CR0_PG _AC(0x80000000, UL) /* Paging
(RW) */
While "UL" here instead of "U"? They are all 32-bit values.
Initially U was used, then I've received the following indication
(https://lists.xenproject.org/archives/html/xen-devel/2023-08/msg02308.html):
CR0 being a 64-bit register, I consider this risky. Imo either
UL needs to be used as suffix, or the change needs limiting to
just PG (and even then perhaps better using UL).
--
Simone Ballarin, M.Sc.
Field Application Engineer, BUGSENG (https://bugseng.com)
|
