On Mon, 13 May 2013 11:23:05 -0400, Christopher Covington cov@codeaurora.org wrote:
Hi Pranavkumar,
On 05/10/2013 03:23 AM, Pranavkumar Sawargaonkar wrote:
This patch does following fixes:
- Make HCR_* flags as unsigned long long constants
Reason : By default, compiler assumes numeric constants as signed hence sign extending it when assigned to unsigned variable such as hcr_el2 (in VCPU context). This accidently sets HCR_ID and HCR_CD making entire guest memory non-cacheable. On real HW, this breaks Stage2 ttbl walks and also breaks VirtIO.
- VTCR_EL2_ORGN0_WBWA and VTCR_EL2_IRGN0_WBWA macros.
Signed-off-by: Pranavkumar Sawargaonkar pranavkumar@linaro.org Signed-off-by: Anup Patel anup.patel@linaro.org
arch/arm64/include/asm/kvm_arm.h | 73 +++++++++++++++++++------------------- 1 file changed, 37 insertions(+), 36 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8ced0ca..14ead69 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -18,44 +18,45 @@ #ifndef __ARM64_KVM_ARM_H__ #define __ARM64_KVM_ARM_H__ +#include <linux/const.h> #include <asm/types.h> /* Hyp Configuration Register (HCR) bits */ -#define HCR_ID (1 << 33) -#define HCR_CD (1 << 32) +#define HCR_ID (UL(0x1) << 33) +#define HCR_CD (UL(0x1) << 32)
Consider using the BIT() macro from linux/bitops.h to improve
readability.
This would probably cause problems when using these macros from assembly code.
M.