From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrew Jones <drjones@redhat.com>
Cc: Bill Wendling <morbo@google.com>, kvm@vger.kernel.org, oupton@google.com
Subject: Re: [kvm-unit-tests PATCH 2/7] pci: use uint32_t for unsigned long values
Date: Fri, 28 Feb 2020 14:02:12 +0100 [thread overview]
Message-ID: <c025bd4c-b390-0b8e-f788-dc01ba0040f1@redhat.com> (raw)
In-Reply-To: <20200228124657.aqgrty74dbki6d4g@kamzik.brq.redhat.com>
On 28/02/20 13:46, Andrew Jones wrote:
> On Fri, Feb 28, 2020 at 12:04:38PM +0100, Paolo Bonzini wrote:
>> On 26/02/20 10:44, Bill Wendling wrote:
>>> The "pci_bar_*" functions use 64-bit masks, but the results are assigned
>>> to 32-bit variables. Use 32-bit masks, since we're interested only in
>>> the least significant 4-bits.
>>>
>>> Signed-off-by: Bill Wendling <morbo@google.com>
>>> ---
>>> lib/linux/pci_regs.h | 4 ++--
>>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/lib/linux/pci_regs.h b/lib/linux/pci_regs.h
>>> index 1becea8..3bc2b92 100644
>>> --- a/lib/linux/pci_regs.h
>>> +++ b/lib/linux/pci_regs.h
>>> @@ -96,8 +96,8 @@
>>> #define PCI_BASE_ADDRESS_MEM_TYPE_1M 0x02 /* Below 1M [obsolete] */
>>> #define PCI_BASE_ADDRESS_MEM_TYPE_64 0x04 /* 64 bit address */
>>> #define PCI_BASE_ADDRESS_MEM_PREFETCH 0x08 /* prefetchable? */
>>> -#define PCI_BASE_ADDRESS_MEM_MASK (~0x0fUL)
>>> -#define PCI_BASE_ADDRESS_IO_MASK (~0x03UL)
>>> +#define PCI_BASE_ADDRESS_MEM_MASK (~0x0fU)
>>> +#define PCI_BASE_ADDRESS_IO_MASK (~0x03U)
>>> /* bit 1 is reserved if address_space = 1 */
>>>
>>> /* Header type 0 (normal devices) */
>>>
>>
>> Removing the "U" is even better because it will then sign-extend
>> automatically.
>>
>
> We don't want this patch at all though. We shouldn't change pci_regs.h
> since it comes from linux and someday we may update again and lose
> any changes we make. We should change how these masks are used instead.
I will try to get the change into Linux.
Paolo
next prev parent reply other threads:[~2020-02-28 13:02 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 7:44 [kvm-unit-tests PATCH 0/7] Fixes for clang builds morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 1/7] x86: emulator: use "SSE2" for the target morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 2/7] pci: use uint32_t for unsigned long values morbo
2020-02-26 7:59 ` Andrew Jones
2020-02-26 9:02 ` Bill Wendling
2020-02-26 9:24 ` Andrew Jones
2020-02-26 7:44 ` [kvm-unit-tests PATCH 3/7] x86: realmode: syscall: add explicit size suffix to ambiguous instructions morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 4/7] svm: change operand to output-only for matching constraint morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 5/7] svm: convert neg shift to unsigned shift morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 6/7] x86: VMX: use inline asm to get stack pointer morbo
2020-02-26 7:44 ` [kvm-unit-tests PATCH 7/7] x86: VMX: the "noclone" attribute is gcc-specific morbo
2020-02-26 8:21 ` Oliver Upton
2020-02-26 8:22 ` Oliver Upton
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 0/7] Fixes for clang builds Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 1/7] x86: emulator: use "SSE2" for the target Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 1/7] x86: pmu: Test WRMSR on a running counter Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 2/7] pci: use uint32_t for unsigned long values Bill Wendling
2020-02-28 11:04 ` Paolo Bonzini
2020-02-28 12:46 ` Andrew Jones
2020-02-28 13:02 ` Paolo Bonzini [this message]
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 2/7] x86: provide enabled and disabled variation of the PCID test Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 3/7] x86: pmu: Test perfctr overflow after WRMSR on a running counter Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 3/7] x86: realmode: syscall: add explicit size suffix to ambiguous instructions Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 4/7] svm: change operand to output-only for matching constraint Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 4/7] vmx: tweak XFAILS for #DB test Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 5/7] svm: convert neg shift to unsigned shift Bill Wendling
2020-02-28 11:12 ` Paolo Bonzini
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 5/7] x86: VMX: Add tests for monitor trap flag Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 6/7] x86: emulator: use "SSE2" for the target Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 6/7] x86: VMX: use inline asm to get stack pointer Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH v2 7/7] pci: cast masks to uint32_t for unsigned long values Bill Wendling
2020-02-26 9:44 ` [kvm-unit-tests PATCH 7/7] x86: VMX: the "noclone" attribute is gcc-specific Bill Wendling
2020-02-28 11:16 ` Paolo Bonzini
2020-02-28 18:19 ` Oliver Upton
2020-02-28 18:24 ` Paolo Bonzini
2020-02-28 18:40 ` Oliver Upton
2020-02-26 19:02 ` [kvm-unit-tests PATCH v2 0/7] Fixes for clang builds Oliver Upton
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 " Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 1/7] x86: emulator: use "SSE2" for the target Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 2/7] pci: cast masks to uint32_t for unsigned long values Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 3/7] x86: realmode: syscall: add explicit size suffix to ambiguous instructions Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 4/7] svm: change operand to output-only for matching constraint Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 5/7] svm: convert neg shift to unsigned shift Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 6/7] x86: VMX: use inline asm to get stack pointer Bill Wendling
2020-02-26 20:12 ` [kvm-unit-tests PATCH v3 7/7] x86: VMX: the "noclone" attribute is gcc-specific Bill Wendling
2020-02-27 2:05 ` Oliver Upton
2020-02-28 11:19 ` [kvm-unit-tests PATCH v2 0/7] Fixes for clang builds Paolo Bonzini
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