Re: [PATCH 4/9] hw/block/nvme: validate command set selected

[Klaus Jensen]

On Sep 30 15:04, Keith Busch wrote:
> Fail to start the controller if the user requests a command set that the
> controller does not support.
> 
> Signed-off-by: Keith Busch <kbusch@kernel.org>

Reviewed-by: Klaus Jensen <k.jensen@samsung.com>

> ---
>  hw/block/nvme.c       | 6 +++++-
>  hw/block/trace-events | 1 +
>  include/block/nvme.h  | 4 ++++
>  3 files changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 41389b2b09..6c582e6874 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -2049,6 +2049,10 @@ static int nvme_start_ctrl(NvmeCtrl *n)
>          trace_pci_nvme_err_startfail_acq_misaligned(n->bar.acq);
>          return -1;
>      }
> +    if (unlikely(!(NVME_CAP_CSS(n->bar.cap) & (1 << 
> NVME_CC_CSS(n->bar.cc))))) {
> +        trace_pci_nvme_err_startfail_css(NVME_CC_CSS(n->bar.cc));
> +        return -1;
> +    }
>      if (unlikely(NVME_CC_MPS(n->bar.cc) <
>                   NVME_CAP_MPSMIN(n->bar.cap))) {
>          trace_pci_nvme_err_startfail_page_too_small(
> @@ -2750,7 +2754,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice 
> *pci_dev)
>      NVME_CAP_SET_MQES(n->bar.cap, 0x7ff);
>      NVME_CAP_SET_CQR(n->bar.cap, 1);
>      NVME_CAP_SET_TO(n->bar.cap, 0xf);
> -    NVME_CAP_SET_CSS(n->bar.cap, 1);
> +    NVME_CAP_SET_CSS(n->bar.cap, NVME_CAP_CSS_NVM);
>      NVME_CAP_SET_MPSMAX(n->bar.cap, 4);
>  
>      n->bar.vs = NVME_SPEC_VER;
> diff --git a/hw/block/trace-events b/hw/block/trace-events
> index 446cca08e9..7720e1b4d9 100644
> --- a/hw/block/trace-events
> +++ b/hw/block/trace-events
> @@ -133,6 +133,7 @@ pci_nvme_err_startfail_cqent_too_small(uint8_t log2ps, 
> uint8_t maxlog2ps) "nvme_
>  pci_nvme_err_startfail_cqent_too_large(uint8_t log2ps, uint8_t maxlog2ps) 
> "nvme_start_ctrl failed because the completion queue entry size is too large: 
> log2size=%u, max=%u"
>  pci_nvme_err_startfail_sqent_too_small(uint8_t log2ps, uint8_t maxlog2ps) 
> "nvme_start_ctrl failed because the submission queue entry size is too small: 
> log2size=%u, min=%u"
>  pci_nvme_err_startfail_sqent_too_large(uint8_t log2ps, uint8_t maxlog2ps) 
> "nvme_start_ctrl failed because the submission queue entry size is too large: 
> log2size=%u, max=%u"
> +pci_nvme_err_startfail_css(uint8_t css) "nvme_start_ctrl failed because 
> invalid command set selected:%u"
>  pci_nvme_err_startfail_asqent_sz_zero(void) "nvme_start_ctrl failed because 
> the admin submission queue size is zero"
>  pci_nvme_err_startfail_acqent_sz_zero(void) "nvme_start_ctrl failed because 
> the admin completion queue size is zero"
>  pci_nvme_err_startfail(void) "setting controller enable bit failed"
> diff --git a/include/block/nvme.h b/include/block/nvme.h
> index 868cf53f0b..bc20a2ba5e 100644
> --- a/include/block/nvme.h
> +++ b/include/block/nvme.h
> @@ -82,6 +82,10 @@ enum NvmeCapMask {
>  #define NVME_CAP_SET_PMRS(cap, val) (cap |= (uint64_t)(val & CAP_PMR_MASK)\
>                                                              << CAP_PMR_SHIFT)
>  
> +enum NvmeCapCss {
> +    NVME_CAP_CSS_NVM = 1 << 0,
> +};
> +
>  enum NvmeCcShift {
>      CC_EN_SHIFT     = 0,
>      CC_CSS_SHIFT    = 4,
> -- 
> 2.24.1
> 
> 

-- 
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